Caveats Linear time-complexity in list length An index call checks every element of the list in order, until it finds a match. If the list is long, and if there is no guarantee that the value will be …

Nov 2, 2010 · When reading, list is a reference to the original list, and list[:] shallow-copies the list. When assigning, list (re)binds the name and list[:] slice-assigns, replacing what was previously …

Use a list of values to select rows from a Pandas dataframe Asked 12 years, 11 months ago Modified 4 months ago Viewed 1.8m times

Apr 11, 2011 · How can I convert a list to a string using Python?

Jul 8, 2018 · Is there a way in Python to list all installed packages and their versions? I know I can go inside python/Lib/site-packages and see what files and directories exist, but I find this very …

Don't use quotes on the command line 1 Don't use type=list, as it will return a list of lists This happens because under the hood argparse uses the value of type to coerce each individual …

Feb 2, 2014 · Best in what way, and is this remove elements based on their position or their value?

Oct 31, 2008 · They are semantically similar to extend. my_list + another_list creates a third list in memory, so you can return the result of it, but it requires that the second iterable be a list. …

While using new_list = my_list, any modifications to new_list changes my_list every time. Why is this, and how can I clone or copy the list to prevent it? For example: >>> my_list = [1, 2,...

I love tuples. They allow you to quickly group relevant information together without having to write a struct or class for it. This is very useful while refactoring very localized code. Initializin...