The first, [:], is creating a slice (normally often used for getting just part of a list), which happens to contain the entire list, and thus is effectively a copy of the list. The second, list(), is using the actual …

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 in the list. …

I have a piece of code here that is supposed to return the least common element in a list of elements, ordered by commonality: def getSingle(arr): from collections import Counter c = Counte...

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 awkward. ...

Nov 1, 2011 · How can I check if a list has any duplicates and return a new list without duplicates?

The notation List<?> means "a list of something (but I'm not saying what)". Since the code in test works for any kind of object in the list, this works as a formal method parameter. Using a type parameter …

Oct 5, 2012 · By using a : colon in the list index, you are asking for a slice, which is always another list. In Python you can assign values to both an individual item in a list, and to a slice of the list.

How can I print a plain list of all files that were part of a given commit? Although the following lists the files, it also includes unwanted diff information for each: git show

Feb 2, 2013 · can we have list comprehension without a for loop and just if/else to put a single default value inside the list and later extend it if required? i.e. result = [ 'hello' if x == 1 ].

Using Pip List Well !pip list will run inside your jupyter notebook if working there, simplifying the 'quick check' Combine with other utilities like grep (if you have installed) pip list | grep pandas will get you …