find all occurrences of a character in a string python code example

Example 1: remove all occurrences of a character in a list python

>>> x = [1,2,3,2,2,2,3,4]
>>> list(filter(lambda a: a != 2, x))
[1, 3, 3, 4]

Example 2: python replace all occurrences in string

>>> 'no one knows how'.replace('no', 'yes')
'yes one kyesws how'