I am using function filter in Python, and using Pycharm as an IDE. When I click on function name to take a look to the code I only see this:
def filter(function_or_none, sequence): # known special case of filter
"""
filter(function or None, sequence) -> list, tuple, or string
Return those items of sequence for which function(item) is true. If
function is None, return the items that are true. If sequence is a tuple
or string, return the same type, else return a list.
"""
pass
Where is the code of this function?
