405 How do I concatenate two lists in Python? As of 3.9, these are the most popular stdlib methods for concatenating two (or more) lists in Python. ... * A solution will qualify as a generalized solution if it …

Aug 20, 2009 · 255 You can't add a list to a set because lists are mutable, meaning that you can change the contents of the list after adding it to the set. You can however add tuples to the set, because you …

Sep 20, 2010 · What is the syntax to insert one list into another list in python? [duplicate] Asked 15 years, 2 months ago Modified 6 years, 6 months ago Viewed 351k times

Nov 25, 2013 · 454 I figured out how to append multiple values to a list in Python; I can manually input the values, or put the append operation in a for loop, or the append and extend functions. Any neater …

Jun 20, 2019 · If you have a list with [0,1,2] and another one with [3,4,5] and you want to merge them, so it becomes [0,1,2,3,4,5], you can either use chaining or extending and should know the differences to …

It would be nice for python to add a list.push_front (item) function. This will be obvious and less error-prone.

Here's the timeit comparison of all the answers with list of 1000 elements on Python 3.9.1 and Python 2.7.16. Answers are listed in the order of performance for both the Python versions.

parser.add_argument('--default') # Telling the type to be a list will also fail for multiple arguments, # but give incorrect results for a single argument. parser.add_argument('--list-type', type=list) # This will …

Mar 6, 2019 · Yes that is definitely something you can do. You simply access the list object that you want to add another item to by its index, and then call .append() on that list object with the new value.

Sep 17, 2012 · For handling a few strings in separate variables, see How do I append one string to another in Python?. For the opposite process - creating a list from a string - see How do I split a …