I'm new to Python. I see
: used in list indices especially when it's associated with function calls.
Python 2.7 documentation suggests that
lists.append translates to
a[len(a):] = [x]. Why does one need to suffix
len(a) with a colon?
I understand that
: is used to identify keys in dictionary.
: is the delimiter of the slice syntax to 'slice out' sub-parts in sequences ,
[1:5] is equivalent to "from 1 to 5" (5 not included) [1:] is equivalent to "1 to end" [len(a):] is equivalent to "from length of a to end"
Watch https://youtu.be/tKTZoB2Vjuk?t=41m40s at around 40:00 he starts explaining that.
Works with tuples, dictionaries and lists, too.
slicing operator. http://docs.python.org/tutorial/introduction.html#strings and scroll down a bit