Escape double quotes for JSON in Python

Question

How can I replace double quotes with a backslash and double quotes in Python?

>>> s = 'my string with "double quotes" blablabla'
>>> s.replace('"', '\\"')
'my string with \\"double quotes\\" blablabla'
>>> s.replace('"', '\\\"')
'my string with \\"double quotes\\" blablabla'

I would like to get the following:

'my string with \"double quotes\" blablabla'

Answer 1

>>> s = 'my string with \\"double quotes\\" blablabla'
>>> s
'my string with \\"double quotes\\" blablabla'
>>> print s
my string with \"double quotes\" blablabla
>>> 

When you just ask for 's' it escapes the \ for you, when you print it, you see the string a more 'raw' state. So now...

>>> s = """my string with "double quotes" blablabla"""
'my string with "double quotes" blablabla'
>>> print s.replace('"', '\\"')
my string with \"double quotes\" blablabla
>>>