Python find minimum in list How can I get the minimum and the maximum element of a list in python. For example here the answer would be -14. Using min() The most efficient way to do this is by using the min() function with the key parameter. I The time complexity of this code is O(n) as it makes two linear scans of the list, one for finding the largest and smallest elements and another for finding the second largest and smallest elements. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent You can use the builtin min function to do this. start (optional): The position from where the search begins. index(min(myList)) However, with a list of floats I get the Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company How would one go about finding the minimum value in an array of 100 floats in python? I have tried minindex=darr. Returning a list of indexes of the smallest value in a multidimensional list. Modified 4 years, 11 months ago. z=7. index(min(myList)) However, with a list of floats I get the If they were integers, I would simply do: minIndex = myList. I have a list in python that is essentially a list of lists. Thus a final tuple is returned with only a single iteration using a generator from the original list to "filter and replace" the NoneType indices. We shall look into the following processes to find the smallest number in a list, with examples. Commented Nov 3, 2013 at 23:17 @Bakuriu's solution returns the smallest, but to return two of def solution(A): # Const-ish to improve readability MIN = 1 if not A: return MIN # Save re-computing MAX MAX = max(A) # Loop over all entries with minimum of 1 starting at 1 for num in range(1, MAX): # going for greatest missing number return optimistically (minimum) # If order needs to switch, then use max as start and count backwards if num not in A: return num # In I'll rename the function take_closest to conform with PEP8 naming conventions. This is useful as a subproblem solution of bigger problem in web development and day-day programming. ) function:. The below Skip to main content. sort(). 1 4 4 bronze badges. datetime. – In this Python article, I will explain how to get the index of the minimum element of a list in Python. @PeterDeGlopper: Good point, but it's also worth mentioning that the simplest key function for (non-ISO-format) dates is usually something like datetime. import heapq indices = heapq. Follow edited Mar 7, 2017 at 18:30. I changed the I'm confused by the problem description: it says 'I am looking to find the minimum value in an array that is greater than 0 and its corresponding position' which to me reads like the task is to find the smallest value which is greater than zero and greater than its Recently, while working with lists or arrays of numbers in Python, I had one requirement: find the minimum and maximum values. The pop operation is O(n) so the overall complexity is O(n). List group by on max date. Methods demonstrated in this article to get the index of the minimum element of a list in Python:. I. min(x for x in foo_list) which returns [1, 8] But I was wondering if there is a similar way to return both minimum values of the The python has a built-in function of min() which returns the minimum value in the list. I wrote this min(len(a[0]),len(a[1]),len(a[2])). Stack Overflow. How to list lowest values in numpy array. Improve this question. In any case, there are dozens of existing questions on Stack Overflow about manipulating a list of dicts, and about techniques like using the key argument of min, max, and sorted. Min and Max of a List (without using min/max function) 0. Given this sample list: [5, 3, 9, 10, 8, 2, 7] How to find the minimum number using recursion? The answer is 2. 1), (5, 0. from operator import itemgetter # Define a function called max_min_list_tuples that takes a list of tuples 'class_students' as For this list elements 1 and 2 have a value of 2 at index[1] within the nested list therefore the 4 and 3 fit the criteria and the min number is 3 so the output should be 3 for val in freqList: print(val[0]) Syntax of List index() Method. 7. (Because many people try to write functions that parse and How to find the shortest string in a list in Python. It one pass that will be: min((a,i) for i, a in enumerate(lst) if a>0)[1] This uses the fact that tuples are In two words - finding min or max diff can be simplified as getting min/max element of a list that consist of differences for each pair of elements from the sorted original list of values Share Improve this answer Plus I was actually trying to find the minimum length out of these lists within a list. Least value in nested list. When you put numbers between single quotes like that, you are creating strings, which are just a sequence of characters. It's an initialization trick, in case the list is empty, it will return infinite, meaning with that that the What is happening in this case of min?. – Now I want to calculate the minimum number in the list irrespective of sign but in the final answer the sign should be retained. How can I get that in a simple way? The proposed dupe (Optimise a minimum operation on a python list of list) had very little to do with this question. The code for the task is l is a list of strings. Modified 2 years, 11 months ago. And the first answer to the question is really extensive in all Python ways to I want to find the minimum value of this list for the third entry in the sub lists, i. min([x for x in my_list if x > min_num]) In python there are many ways to get minimum and maximum from a list by using different method such as using min() and max() function, by using “for” loop, and by using sort()function. values(), key=lambda x: (x[0]<0, x)) #(0, 1, 'e') For the negative values, x[0]<0 will be 1 so they will sort higher than the positive values. Here, we have given a list of numbers and we have to find the smallest number in given list by using different methods, such as min(), for loop() , and sort(). Then for subsequent elements, the x < min_value check will evaluate to False since this value is already the minimum of the Time Complexity: O(n*m) where n is the number of sublists in the test_list and m is the length of the sublists. Ask Question Asked 11 years, 2 months ago. Python Find Minimum Pair Sum in list - The Minimum pair sum is defined by finding the smallest possible sum of two numbers taken from a given list of numbers. That is a size dependent problem. Find the index of minimum values in given array in Python. Getting the max date from a list of date strings. Finding Min/Max Date with List Comprehension in Python. This seems like a pretty simple problem, but I'm looking for a short and sweet way of doing it that is still understandable (this isn't code golf). This You can use . 1, you can also use find_peaks. Understanding the Problem The problem at hand is to find the minimum product from the given list and create a program in Python. We can find largest and smallest element of list using max and min method after getting min and max element pop outs the elements from list and again use min and max element to get the second largest and second smallest element. min(a) will give you the smallest row, performing a row by row comparison. def locate_min(a): smallest = min(a) return smallest, [index for index, element in enumerate(a) if smallest == element] The old version relied on a Python 2 implementation detail that None is always sorted before anything else (so it tests as way of finding the second smallest number is by eliminating the smallest number from the list and then printing the minimum from the list would return me the second smallest element of the list. Method #2 : Using map() + min() + zip() This works in almost similar way as the above method, but the difference is just that we use map function to build the min element list rather than python find min value in the list of dictionary plus if condition. Modified 11 years, 2 months ago. The syntax has nothing python 3. count(minValue) > 1: for i, num in enumerate(my_list): if num == minValue : print(i) Your problem was printing my_list. Although the time complexity of using max() is worse than using Counter. Calling two O(N) functions still gives you a O(N) algorithm, all you do is double the constant per-iteration cost. 6 timings shown in IPython 5. Some of these dates might be in the future. Ask Question Asked 12 years, 9 months ago. lst = range(10) print min(lst) EDIT: I agree that the answer that was accepted is better. python; list; selection; Share. Loop through the elements in test_list using the enumerate() function to get both the index and value at each position in the list. Here is my code : A = [3,2,1,2,3,5,6] def min_distance(A): for i in range(len(A)): distance = len(A) - 1 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Concerning method 1: A) it is an in-place operation, use sort build-in for a new list B) using a sort approach to find only the min/max could be a waste since, depending on the data in the list, it is at worst an n*log(n) – Taken a list of integer "l" (separated by commas) in line 1. 0, inf, , 5. Thus the value of [1,1,21] is less than [1,3], because the second element of [1,3], which is, 3 is lexicographically higher than the As you mentioned, numpy. Finding two smallest values in a list. How to get the max x and min y coordinates from a 2D list 3. For a collection The sorted() function returns a new sorted list from the items in the iterable. Max value from list. Hot Network Questions How do I find min values excluding zero in this list which has nested lists below? lst = [[1, 5, 7], [8, 6, 3], [0, 2, 4], [0, 0, 0]] I tried this function but it will show 0 obviously. Another way is to use a for loop to iterate through the list, keeping track of the minimum value seen so far. Python min and max finding in list with numpy,argmin and argmax functions. min Find the minimum value in the list using the min() function, and store it in the variable min_val. If all you need is the single smallest value, this is an easy way: from operator import itemgetter lst = [20, 15, 27, 30] As of SciPy version 1. Nothing prevents you from writing a find function in Python and use it later as you wish. Proven that you are given an unordered list of numbers, then you would need to sort the list first. Finally, you'll Python min () function returns the smallest of the values or the smallest item in an iterable passed as its parameter. The easiest way to find the position of the maximum and minimum elements in a list is by using Python’s built-in max() and min() functions along with index(). Add a comment | Your Answer Reminder: Answers generated by artificial Python Min-Max Function - List as argument to return min and max element. Finding min. In Python I've got a list of datetime objects, and I want to find the oldest or youngest one. In other words, I need to know which move produced the max (at a first player's turn) or min (second player) value. You can also use list comprehension to loop through lists in list and functions you want to use: You can also use list comprehension to loop through lists in list and functions you want to use: I don't guarantee that this will be faster, but a better algorithm would rely on heapq. nsmallest(10,np. Find 2nd minimum along second axis in a 2-D numpy array. Then loop through each dictionary item in your list and compare against the max and min values and update if required. Share. Note: the above code is to pick up the max and min by using for loop, which can be commonly used in other programming languages Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I am kinda of new to python and I recently came across this problem which I cannot figure which is how to find the minimum value of a list without using the min or max function in python. To identify the smallest string by length in a list, we compare the lengths of all strings and select the shortest one. 17. foreach() method to find a minimum value. It can be used to solve challenges when minimizing the total of two elements is important, such as reducing the cost, distance, or time necessary for a certain operation. However, the other is pushed into highly optimized C, so it might still perform better. The min (list1) would give me 3. ; We will cover different examples to find the index of element in list using Python and explore Building on answer from Calculate difference between all elements in a set of integers. index(minValue) , which always returns the first instance of the minValue, so the solution is to print the current index that the for loop is at for every item max = list[0] for x in list: if x > max: max = x print max In this example, we initialize the max value to the first element. argmin() and print darr[minindex] with import numpy (darr is the name of the array) but I get: minindex=darr. You can leverage masking zeros from an array (or ANY other kind of mask you desire, even masks that are more complicated than a simple equality) and do pretty much most of the stuff you do on regular arrays on your masked array. Python program to find maximum and minimum number in a list; In this python article, we would love to show you how to find maximum and minimum number in a list in python. Let’s discuss certain ways in which this problem can be solved. Right now I can get the function to find either the minimum index of a list of integers or strings but not both at the same time. argmin() AttributeError: 'list' object has no attribute 'argmin' what might be the problem? Is there a better alternative? You can use the min() function in combination with a list traversal using a for loop as follows to introduce conditions when finding minimums: L= [383, 590, 912, 618, 203, 982, 364, 131, 343, 202] m = min(i for i in L if i > 200) print(m) Hi guys I need help creating a function that will find the minimum index of a list that includes both a list of strings and a list of integers. datetime. Find minimum of two values in Python . using the min function. Then we iterate through the list, and if we find a larger value than the current max, we assign that value to max. The problem is that as soon as you find the first common element in the two lists, you return that single element only. 2), (4, 2. So I wrote a small code for the same using recursion. Finding max and min indices in lists in Python. Consider: python -m timeit -s 'my_list = range(1000)[::-1]' 'my_list. a local minimum). seq = [x['the_key'] for x in dict_list] min(seq) max(seq) [Edit] If you only wanted to iterate through the list once, you could try this (assuming the values [and ], and actually generate a Python list as an intermediate step. If the elements in the list are numbers, the comparison is done numerically; I want to find the minimum of a list of tuples sorting by a given column. Improve this answer. Find the smallest number in given list using For loop. You can use the Python built-in min() function to get the minimum value of the list in the following way: list_of_numbers = [10,32,98,38,47,34] print(min(list_of_numbers)) #Output 10 . One way is to find the min element and then find its index, like in another answer. Finding minimum number for each element in 2 lists of integers in Python. If the last element of the list is greater than the first element of the list, then the list has not been rotated. Commented Jun 28, 2019 at 18:10. [2,5,7,9,3] l_two = [4,6,9,11,4] and I need to find the min and max value from both lists combined. find max of datetime list if it has None. In Python, there are a number of ways to find the minimum value from a list. How to get a list of date time objects in python and find out the In Python, lists are one of the most common data structures we use to store multiple items. Commented Mar 16, 2011 at 4:01. I have some data arranged as a list of 2-tuples for example. In this tutorial, I will explain different methods to find The min() is a built-in function of Python that is used to find the smallest element in a list, tuple, or any other iterable object. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private How can I find the index of the minimum item in a Python list of floats? If they were integers, I would simply do: minIndex = myList. That however makes two passes over the list. Modified 1 year, 7 months ago. itemgetter(-1) returns the last element of each list. If you wanted something higher level, like perhaps the greatest or smallest distance, you could reduce the number of calculations based on some external knowledge, but the given your setup, the best you're going to get is O(n^2) performance. . Time Complexity: O(N) Auxiliary Space: O(1) Approach#3: This task can be performed using max and pop methods of list. array([ (1 determine the minimum element, and then check it against other elements in the list. I have only been able to find an answer for a simple list. And the elements are represented inside the square brackets and separated by comma. – colidyre. Since you want to sort by the minimum value, it's a much better idea to use the built-in sorted method which is designed precisely for this job, rather than your own custom version:. How do I optimiz Find minimum key value from list of dicts, ignoring None values [duplicate] Ask Question Asked 4 years, 11 months ago. 8usec per loop (and carefully designed to be worst case scenario). Here's the original code just to signify i know how to find the min date value: for snapshot in snapshots: if earliest_date > snapshot: earliest_date = snapshot Anyone has any ideas? python; date; list-comprehension; Share 2014' you can provide a key function to tell Python how to calculate a comparable value from the input. Getting min value from a list using python Try to make a code out of your assumptions, then maybe we could understand your intentions better. Note: We use the min() method in Python to find the minimum In general, find the min (or max) using a loop requires you to initialize the return variable to something huge (or a huge negative value). The space complexity is O(1) as the code only uses a constant amount of extra space. index(element, start, end) Parameters: element: The element whose lowest index will be returned. min(my_list) However, you are looking for the minimum number that is higher than min_num. Taken a integer "num" in line 2. Finding max and min indices in lists in This problem involves searching through a list to identify the smallest number that is still larger than K. a = [2, 2, 4, 2, 5, 7] If one is to find the minimum value in this list (which is 2) the corresponding indexes of 2 in the list a are 0, 1 and 3 respectively. Create an empty dictionary index_dict to store the indices of each unique In python there are many ways to get minimum and maximum from a list by using different method such as using min() and max() function, by using “for” loop, and by using You can find the smallest number of a list in Python using min () function, sort () function or for loop. The min()function takes an iterable(like a list, typle etc. This is similar to @Jon Clements's answer. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & This code is supposed to iterate over the list of lists and return the entire list that contains the smallest value. Mark and SilentGhost generally tell you how it should be done in a Pythonic way, but I thought you might also benefit from knowing why your solution doesn't work. How to tell python to use the minimum I'm a big fan of generators and comprehensions, but in this case it seems they are not the right way to go, because: You want to compute the min and the max of the list; Your list is huge my_list = [3, 2, 5, 7, 2, 4, 3, 2] minValue = min(my_list) my_list. Finally, we use these indices to extract the corresponding tuples from the original Just subtract the maximum value from the minimum value. tuples can be indexed (see: Accessing a value in a tuple that is in a list). That part I'm okay with, the issue I'm having is how do I get the program to return all the occurrences of that min value? Restrictions I can't use anything like enumerate or other such functions, I'm allowed to use the min function but that's Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company If you are trying to avoid using two loops, hoping a single loop will be faster, you need to reconsider. Now, that said, I don't suggest you use your . In Python , dictionary is defined as - dict = {'a':8 , 'b':8, 'c':15, 'd':13 } Then you can iterate over the key value pairs in this dictionary to find the 5 smallest numbers. @dcrosta, yes, thank you, you're right of course. Execution time is 1 second and my code exceeds the allowed time. 3): output: find_nminimum(lis,0) gives minimum of the list. 1, with an index of 2, now i want to print list2[2]. To calculate the N distances, there's not a better method than brute forcing all of the possibilities. Plus, SO is not a code writing service if you want to get a proper answer for your question it's better to add the code that you've tried before and explain more about your expected output and the reasons that you don't want to use certain solutions. Get min max from the list inside a list . Syntax: list_name. If you want the minimum of each column independently, you can use zip to access column values and apply the min() function to each column: I need to find the index of more than one minimum values that occur in an array. In your case you are initializing the minimum to the first element in the list. min() returns the smallest representable datetime, not the minimum of a list of datetimes. You can set up dictionaries to hold the max and min values. flatten() and pass that into the built-in min function. Example: ls = [[2,3,5],[8,1,10]] The minimum value in ls is 1. from datetime import datetime datetime_list = [ datetime(2009, In python there are many ways to get minimum and maximum from a list by using different method such as using min() and max() function, by using “for” loop, and by using sort()function. You'll also learn how to modify their standard behavior by providing a suitable key function. This solution is also shorter and easier to understand than the others, so arguably more Pythonic. You can use the builtin min function to do this. @Cfreak, well I know that I can find the minimum distances by using a list comprehension and using min() but I still don't know how to retain the values of 'responder' – user2767074. GvR is Guido van Rossum, Python's benevolent dictator for life. Code. 6)] import numpy as np #create a python list of tuples and convert it to a numpy ndarray of floats data = np. Find the minimum value in a python list. find_nminimum(lis,n) gives the nth minimum in the list. Since I'm still new in adapting to the recursive method, I would like to seek some help regarding my line of code: listA = [9,-2,6,1,80, So I have this list and variables: nums = [14, 8, 9, 16, 3, 11, 5] big = nums[0] spot = 0 I'm confused about how to actually do it. Instead of using itemgetter() he simply reverses the order of the values in the tuples so they naturally sort in the correct order. That is, I want to generate a single min and a single max value. You get [8,7] because [8,7] is smaller than [9,-2] and smaller than [9,100] (compared as whole lists). Python find min & max of two lists. Finally for the positive values, x will be used to find the min. You can use the Python min() function to find the minimum, or smallest, value in a list made up of numbers or strings. However, the return value shouldn't be min(seq[i]) but instead only seq[i]. I want to find the minimum value in a list. After you sort a list, you have your smallest number at the start of the list if you have sorted in ascending order or at the end of the list if you have sorted in descending order. You can use the key argument to min(): path = min(my_list, key=operator. How can I find the min and max of a specific position in a loop of lists? 4. 01), (6, 0. How to find the minimum from a matrix in multiple lists in python? 0. Using is for comparing with None as in value is not None is prefered to using == (or !=). # Find the Min and Max in a List without min/max using sorted() Find min in list - python. Another way: >>> [i for i in range(len(a)) if a[i] > 2] [2, 5] In general, remember that while find is a ready-cooked function, list comprehensions are a general, and thus very powerful solution. Find third latest date in a list. This method directly calculates the smallest string based on its length, avoiding the need for explicit looping. Now we use argmin and argmax functions of Numpy to get the index of the minimum and maximum values in each column of the array. Python find list lengths in a sublist. Find the smallest number in given list using sort() function. argmin returns the index of the minimum value (of course, you can then use this index to return the minimum value by indexing your array with it). Choose one, based on your program The Python list min() method compares the elements of the list and returns the element with minimum value. most_common(1) as PM 2Ring comments, the approach benefits from a rapid C implementation and I find this approach is fastest for short lists but slower for larger ones (Python 3. The index() function is another You can do this by passing in a key function to min that forces the negative values to rank higher: min(d. 5), (7, 0. Finding the minimum of a Numpy array of (x,y) cordinates. I found this in a question paper while I was doing recursion exercises. Hot Network Questions In the early solar system, were most orbits highly eccentric? You can just use min() or max() on single list to get it's min/max value. Using the height argument, one can select all maxima above a certain threshold (in this example, all non-negative maxima; this can be very useful if one has to deal with a noisy baseline; if you want to find minima, just multiply you input by -1): Find the minimum value in the list using the min() function, and store it in the variable min_val. 0. How to get the min value of a key based upon the value of another key in a list of dictionaries? 2. 4. I just need the general idea. 7] 1. data = [ (1, 7. Finding the minimum result of a list of results. Viewed 2k times 1 . Now to find the smallest positive value a solution is to use a list comprehension and then min(): min([i for i in l if i > 0]) returns. answered Mar 7, 2017 at 18:22. argmin but it gives me the index of very first minimum value in a array. ) and returns the smallest value. The four following methods produce what you want. Going element wise on my_list, firstly [1,2,21] and [1,3]. on your code, the first smallest_greater should work if you switch the > with <= in if seq[i] > value:. for value in somelist: if not min_value: min_value = value. The operator module has replacements for extracting members: "lambda x: x[1]" compared to "itemgetter(1)" is a Note, however, that this approach will iterate the list twice, and also calculate the distance of each value twice -- once to find the (any) minimum value, and then again to compare each value to that minimum. __getitem__) This should work in approximately O(N) operations whereas using argsort would take O(NlogN) operations. If you mean quick-to-execute as opposed to quick-to-write, min should not be your weapon of choice, except in one very narrow use case. The min solution needs to examine every number in the list and do a calculation for each number. It works in python 2 just fine. Let us explore different methods to find smallest number in a list. index() to retrieve the index of an element from a list. – javidcf. And also, we do not change the order of elements in the given list. Can this be made any better? python; list; Share. – Daan. Used for loop in line 3 to traverse inside the list and checking if numbers(of the list) meets the given number(num) then it will print the index of the number inside the list. Get point with minimum x from 2D numpy array of points. I can't fi Masked arrays in general are designed exactly for these kind of purposes. These two functions are used in combination to find the index of a minimum element in a single line code. How to find the shortest string in a list in Python. Commented Dec 23, 2020 at 10:34. strptime (with a format partialed into it) or other similar way to convert them into actual date objects that know how to compare to each other. Find minimum value above a certain threshold in a Python list. I need to find one element from each list, which the absolute difference is minimal. g. At I was wondering if there is a way to find min & max of a list without using min/max functions in Python. Hot Network Questions Colombian passport expires in 5 months Odd-looking coordinate system Is it possible to discover a The minimum element will always be the element that is less than the element preceding it. def find_index_of_min(L): """ Parameter: a list L Returns: the index of the minimum element of the Finding the Min and Max value in a list of tuples using Python - Introduction The Python language is composed of several data structures and from the list is the most common one. – dcrosta. Commented Nov 3, 2013 at 23:15. Let's consider the following list. Finding the minimum and maximum of a list of arrays . Get a maximum value I came up with the following and it works as you can see with max, min and others functions over lists like these:. xs = [7, 8, 3, 1, 5] def sort_list(lst): return sorted(lst) print sort_list(xs) The solutions suggested by S. Finding a minimum value in a list of lists and returning that list. You can also use the count method on a list to find the number of times a value occurs in the list. The min() function in Python is a versatile built-in function that returns the smallest item in an iterable or the smallest of 2 or more arguments. Here's a five year old post from him explaining why lisp-isms (map,filter,reduce,lambda) don't have much of a place in python going forward, and those reasons are still true today. l = [ 7, 3, 6, 9, 2, -1, -5, -4, -3] to find the smallest value, a solution is to use the function min(): min(l) which returns here:-1 2 -- Find the smallest positive value. 16. Given a list like the next one: foo_list = [[1,8],[2,7],[3,6]] I've found in questions like Tuple pairs, finding minimum using python and minimum of list of lists that the pair with the minimum value of a list of lists can be found using a generator like:. Example: Find Python min integer from the list. Now from the docs . copy(list1) # create a temporary list so that we can reference the original list1 index later on # a shallow copy will work with 1D lists for i in range(0, k): min1 = 9999999; for j in range(len(cpList)): # note that I changed list1 to cpList if @abarnert -- Careful making grand claims about efficiency. The list item at index -1 stores the largest number in the list. I know I can use min(), but I am learning Python and want to implement this for practice on my own: x=[2,3,5,9,1,0,2,3] z=len(x)-1 i=0 In this tutorial, you'll learn how to use Python's built-in min() and max() functions to find the smallest and largest values. itemgetter(-1)) This will apply the key function to each element of the list, and return the element for which the result of applying that funciton is minimal. Instead, make your main object return a list of values, and simply call the Python min() function. 1. Viewed 95k times 25 . To find the smallest element in a list, use the min() function with the list as its argument. Find minimum and maximum value at each index of a dictionary of lists. Create an empty dictionary index_dict to store the indices of each unique value in the list. We know that sort() function sorts a list in ascending or descending order. This question I'm trying to create a list of the index's of the minimums of each list in a list of list. – Daniel Pryden I have two lists of integers. I am trying to find out minimum distance between duplicate items in a list. If two items to be compared are themselves sequences of the same type, the lexicographical comparison is carried out recursively. 1), (3, 1. Python indexes are zero-based, so the first item in a list has an index of 0, and the last item has an index of -1 or len(my_list) - 1. I didn't consider exceptions when n>len(lis). The elements inside the list can be from any data type like integer, string, or float data type. Wanlie Wanlie. Ask Question Asked 13 years, 4 months ago. If you want to manually find the minimum as a function: min_value = None. If performance is very important, you should use @Kasramvd's appraoch. We will explore different methods to achieve this in Python In this article, we’ll look at simple ways to find the smallest element greater than k Max and Min in List of Tuples. Sometimes we need to find the position or index of the maximum and minimum values in the list. python -m timeit -s 'my_list = range(1000)' 'min((val, idx) for (idx, val) in I'm trying to find the minimum value in a list recursively. @mrexodia What's wrong with iterating over the list twice? Just the inefficiency? This implementation has the potential to be much faster than the ones based on enumerate, because they allocate a pair on the heap for each element. Get second minimum values per column in 2D array . I've got a list of datetime objects, and I want to find the oldest or youngest one. Here, I will describe the six ways to get the index of the minimum element of a list with illustrative examples. His uses heapq which means it can be used to find more than one smallest value. Then, pass this minimum value to the index() function which returns the index of the element. Get all min values from dictionary list. lst = Skip to main content. Like so: Python Find Index of Minimum in List Using the min() and index() Functions. This is trivial in Python. I have already identified that it keeps returning the list at index[0], but I cannot figure out why. Viewed 99k times 64 . ex) The minimum value of z occurs at x = 2 . a = [12, 10, 50, 100, 24] print min(a) If you really want to use loop, minimum = a[0] for number in a: if minimum > number: minimum = number print minimum You can use max function to find the maximum in a list. 3. I would like to find the minimum value within a range of values in that list (i. So we will use Python to implement the code. Given a list of strings, what's the easiest way to find the shortest string? Minimum value on a 2d array python. Right now I am first splitting the list into positive and negative and calculating the minimum and maximum respectively and then comparing the absolute and returning the answer. 2 Sometimes, while working with Python list, one can have a problem in which one needs to find perform the minimum of list in pair form. Then I want to print out the first value of that sublist, x . elif value < min_value: min_value = value. min=student_scores[0] for n in range(0,len(student_scores)): if student_scores[n]<=min: min=student_scores[n] print(min) # using for loop to go through all items in the list and assign the smallest value to a Now, that said, I don't suggest you use your . The min() is a built-in function of Python that is used to find the smallest element in a list, tuple, or any other iterable object. I'm certain this must be a duplicate, but I can't find a good dupe target right now. To make your code work properly, you would have to do this: I'm using Python's max and min functions on lists for a minimax algorithm, and I need the index of the value returned by max() or min(). Python find the max date in a list which are no later than a given date. Getting min value from a list using python. A cool way to do this is with itemgetter. Finally, the min function is built into Python and can be used to find the minimum value in an list. Most recent date for list sorted by values . Given a list, find the index of a minimum element. You can find the min/max index and value at the same time if you enumerate the items in the list, but perform min/max on the original values of the list. Approach #3 : To find a minimum number you can use. Then the min() gets called and uses the enumerate() return with lambda to check the values in the i[1] index (e. I am pretty known with np. Below are two examples taken from the documentation itself. One way is to use the built-in min() function. See this: min(["arthur", "Arthur"], key=len) will return "arthur" and provided code will return "Arthur" instead. You could also flatten into a single dimension array with arrname. for list1 in new_distances: min_list =[] min_index=[] cpList = copy. Find the minimum value of a list and print the corresponding index from another list. Should note that these are not my actual values, they are much more complicated. index(min(my_list))'-- 96. Its usage extends beyond finding the minimum value; it can also be employed to find the minimum element in a list. The function operator. min=student_scores[0] for n in range(0,len(student_scores)): if student_scores[n]<=min: min=student_scores[n] print(min) # using for loop to go through all items in the list and assign the smallest value to a variable, which was defined as min. from itertools import combinations def find_differences(lst): " Find all differences, min & max difference " d = [abs(i - j) for i, j in combinations(set(lst), 2)] return min(d), max(d), d Finding minimum, maximum value of a list in Python. Using list comprehension you can select all numbers larger than min_num as follows: my_list = [x for x in my_list if x > min_num] By combining the two you will get your answer. count(minValue) if my_list. return Learn how to find the minimum value and its index in a Python list using loops, min() function, or list comprehension. Comparison on the basis of min function. So, please consider the next example list find out the position of the maximum in the list a: >>> a = [3,2,1, 4,5] I have a dictionary mapping an id_ to a list of data values like so: dic = {id_ : [v1, v2, v3, v4]}. minimum in python without using min function [python 2. ; end (optional): The position from where the search ends. I'm trying to iterate through every value in the dictionary and retrieve the max/min of a certain index of the list mappings. Using bisect. 64. it is rare for a programming task to have the best way – alko. Pictorial Presentation: Sample Solution: Python Code: # Import the 'itemgetter' function from the 'operator' module. For example List1 is of length 40 List2 is of length 42 List3 is of length 47 How can I use the Python inbuilt min() or any other method to find the list Is "if item in my_list:" the most "pythonic" way of finding an item in a list? EDIT FOR REOPENING: the question has been considered dupplicate, but I'm not entirely convinced: here this question is roughly "what is the most Pythonic way to find an element in a list". Let’s say we have the following list of numbers in Python. For the other one, the problem is that you are overwriting the value of value with the for loop leading to This is useful because it means we don't have to find the minimum value twice. 57), (2, 2. in list / 2D array and do calculation in Python. The line with filter is wrong, try putting a 0 in the list and you'll see it will get filtered too, which is not what you want. My logic is very naive: I make two Python has a data structure called Dictionary that you can use to store key/value pairs . Python Minimum Product Pair in List - In the given problem statement, we have to find the minimum product pair in the given list and list of tuples. This Finding min. e. nditer(arr),key=arr. will take the leftmost shortest string which is another behaviour as list. The question is I have to use a for loop to go through a list and find the minimum value and then return the index of that value. Adding additional logic to a lambda function to get the minimum value from a python dictionary. 2. Though finding the smallest number using sort() function is easy, using Python For Loop does it relatively faster with less number of operations. See examples, code snippets, and output for each method. The fact that Python Find Min value in a Nested List with two conditions. 2), (8, 0. My question is - what is the most pythonic way to achieve this def solution(A): # Const-ish to improve readability MIN = 1 if not A: return MIN # Save re-computing MAX MAX = max(A) # Loop over all entries with minimum of 1 starting at 1 for num in range(1, MAX): # going for greatest missing number return optimistically (minimum) # If order needs to switch, then use max as start and count backwards if num I want to find the smallest value in a list of lists in Python. Auxiliary Space: O(n) where n is the number of sublists in the test_list. Python to Find Minimum/Min and Maximum/Max A straightforward solution: def minimum(lst): n = float('+inf') for num in lst: if num < n: n = num return n Explanation: first, you initialize n (the minimum number) to a very large value, in such a way that any other number will be smaller than it - for example, the infinite value. Python provides a few easy ways to get this. : >>> def find_indices(lst, condition): I want to find the minimum value of list1 and take that minimum value's index and use it to print out the value from list2 for that corresponding index. Output. min(sub[1] for sub in data)If not all sublists have at least two elements, we can add a filter conditon: I have three lists of different lengths. Using that we can create a list from those indices and call minimum like you had done: def min_steps(step_records): """ random """ if step_records: result = min([step[1] for step in step_records]) # min([1,2,3]) else: result = None return result step_records = [('2010-01-01',1), . Here we will be using Numpy to convert the list of tuples into a Numpy array. bisect_left instead is almost always faster. 0). You can also specify an axis for which you wish to find 2. how to resolve this using min and max functions but no conditional statements. Write a Python program to find the maximum and minimum values in a given list of tuples. Or we can say Python find min & max of two lists. You can make a generator that obtains the second element for each sublist with: sub[1] for sub in data So we can pass this to the min(. data = [[9 ,5, 2, 8, 6], [3, 5, 1, 9, 2], [2, Skip to main content. minimum of list of lists. lzmcxdvhewujizikswybgjextcwipcqjpxeugpfxmcpvjtku