What does `r` and `!` mean int python string?

Question

I have following lines

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

What does r and ! mean here?

That doesn't look like a legit (minimal) snippet. – user2864740 Apr 30 '16 at 23:27 — user2864740, Apr 30 '16 at 23:27

score 1 · Accepted Answer · answered Apr 30 '16 at 23:28

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 '16 at 23:28

Ben

what diffrence between str() and repr()? – Tany May 01 '16 at 07:45
Here's a description of the two. http://stackoverflow.com/questions/19331404/str-vs-repr-functions-in-python-2-7-5 – Ben May 01 '16 at 20:16

score 0 · Answer 2 · answered Apr 30 '16 at 23:26

0

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

answered Apr 30 '16 at 23:26

2 Answers2