How can I escape the format string?

Question

Is it possible to use Python\'s str.format(key=value) syntax to replace only certain keys.

Consider this example:

my_string = \'Hello {n         


        

Answer 1

Python3.2+ has format_map which lets you do this

>>> class D(dict):
...     def __missing__(self, k):return '{'+k+'}'
... 
>>> my_string = 'Hello {name}, my name is {my_name}!'
>>> my_string.format_map(D(name='minerz029'))
'Hello minerz029, my name is {my_name}!'
>>> _.format_map(D(my_name='minerz029'))
'Hello minerz029, my name is minerz029!'

Now it's not necessary to add extra {}, only the keys you provide to D will be substituted

As @steveha points out, if you are on an older Python3 you can still use

my_string.format(**D(name='minerz029'))