What does `r` and `!` mean int python string? [duplicate]

Question

I have following lines

{value!r}".format(value=value) 
%(access_token)r % value

What does r and ! mean here?

Ben · Accepted Answer · 2016-04-30 23:28:50Z

1

It's a conversion operation. It converts value to a string using repr()

Check out "Explicit Conversion Flag" in https://www.python.org/dev/peps/pep-3101/ for more info.

answered Apr 30, 2016 at 23:28

Ben

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2 Comments

what diffrence between str() and repr()?

Ignacio Vazquez-Abrams · Accepted Answer · 2016-04-30 23:26:33Z

0

r means print the repr() of the object. ! is what allows it to work in format strings.

answered Apr 30, 2016 at 23:26

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