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a = 'hello world'
b = a[:5] + '\\\"' + a[5:]
print(b) # hello\" world
c = 'hello{0} world'.format('\\\"')
print(c) # hello\" world
def p(strs):
print(strs)
if __name__ == '__main__':
s = r'abc\abc'
p(s)
s = r"abcd\fadf"
print(s, len(s)
abcd\fadf 9