Free Interactive Python Tutorial

This is my code: In [8]: b=dict.fromkeys([1,2,3,4], []) In [9]: b[1].append(1) In [10]: b[2].appe… Read more Python: Why Lista.append('a') Affects Listb?

How do I create a new list containing only the beginning index number of where the segment of True … Read more Index Lists For Specific Repeating Element

Have the following code: import sys ints = [1,2,3,4,5,6,8,9,10,11,14,34,14,35,16,18,39,10,29,30,1… Read more Group Consecutive Integers Together

I have this issue where I would like to shuffle a list, but only do so slightly. Say, I want only a… Read more How To Lightly Shuffle A List In Python

Is there a way to pass a variable to the choice() function for a list. I have a bunch of lists and… Read more Random List Choices In Python

Python does has built in functions any() and all(), which are applied on a list(array in JavaScript… Read more What Is The Equivalent Of Python Any() And All() Functions In Javascript?

I have the following list: data_items = ['abc','123data','dataxyz','456… Read more Count Occurrences Of Search Strings In A List

I have the following python code which almost works for me (I'm SO close!). I have text file f… Read more How Do I Remove Duplicate Words From A List In Python Without Using Sets?

I need some help with deleting some items from some lists at the same time, when a button is click… Read more Delete Items From 3 Different Lists

In my penultimate (next to last) line from all the files in a specific directory, I have a list of … Read more How To Read An Output Line Containing A List Of Integers Produced

So this is my code, when I had everything set to 'print' things, the code worked, but now w… Read more Why Isn't This Code Returning These Lists? Does This Have To Do With Using 'return' Rather Than 'print'?

In Python I have a list of strings, some of which may be the empty string. What's the best way … Read more Get First Non-empty String From A List In Python

The following dictionary gives the word and its value: keywords = {'alone': 1, 'amazed&… Read more Matching Keywords In A Dictionary To A List In Python

How can I find the dictionary with value user7 then update it's match_sum eg add 3 to the exist… Read more Find And Update A Value Of A Dictionary In List Of Dictionaries

Given a list, I can get the product of each item in a list as such: from itertools import product x… Read more How To Nest Itertools Products?

a = [ 1, 2 ] b = a a.append(3) print(b) # shows [ 1 2 3 ] which means b changed c = 4 d = c c = 8 … Read more Why Did One Value Change But The Second Value Did Not?

I have a similar question to this question: Determine if 2 lists have the same elements, regardless… Read more Python: Determine If An Unsorted List Is Contained In A 'list Of Lists', Regardless Of The Order To The Elements

Tell me please, how does it work exactly? Why does each iteration result write to array? list_of_st… Read more How Does This "[.. For .. In ..]" Work In Python?

My Goal - To list only 5 entries when using OS walk. So far I have only been able to get a list of … Read more Print/list Only 5 Entries From Os.walk In Python

I have a list named rule.start. In this list, all elements are equal to an element from another lis… Read more Replace Element In List With Element From Another List - Python