replace letters in python code example

Example 1: replace character in string python

>>> x = 'xpple bxnxnx cherry'
>>> a = x.replace(x,a)  # replaces x with a
'apple banana cherry'

>>> first_a = x.replace(x,a,1)  # only replaces first a
'apple bxnxnx cherry'

Example 2: replace characters in string python

>>> a = '&#'
>>> print a.replace('&', r'\&')
\&#
>>> print a.replace('#', r'\#')
&\#
>>>