Python string formatting

Question

I see you guys using

url = '"%s"' % url # This part

>>> url = "http://www.site.com/info.xx"
>>> print url
http://www.site.com/info.xx
>>> url = '"%s"' % url
>>> print url
"http://www.site.com/info.xx"

Is it advanced Python? Is there a tutorial for it? How can I learn about it?

Duplicate: http://stackoverflow.com/questions/1225637/python-string-formatting — bignose, Mar 23 '10 at 13:06
You've marked both questions as duplicates. Surely you'd mark only the latter (chronologically) — Anti Earth, Dec 30 '12 at 06:35

score 17 · Answer 1 · answered Feb 12 '09 at 21:43

17

It's common string formatting, and very useful. It's analogous to C-style printf formatting. See String Formatting Operations in the Python.org docs. You can use multiple arguments like this:

"%3d\t%s" % (42, "the answer to ...")

answered Feb 12 '09 at 21:43

dwc

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The real answer is 43 but don't tell anyone. – Janusz Lenar Dec 12 '11 at 21:32
@Janusz Lenar blasphemy, I will not flag you this time but big brother is keeping an eye on you now. – AWE Sep 22 '14 at 20:52
Url is broken => Correct Url https://docs.python.org/3/library/string.html#formatstrings – Sandeep Singh Rawat Jul 22 '16 at 18:15

score 8 · Answer 2 · answered Feb 12 '09 at 21:37

8

That line of code is using Python string formatting. You can read up more on how to use it here: http://docs.python.org/library/stdtypes.html#string-formatting

answered Feb 12 '09 at 21:37

Dan Lew

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score 0 · Answer 3 · answered Feb 12 '09 at 21:37

0

It is not advanced, you can use ' or " to define a string.

Check the documentation.

answered Feb 12 '09 at 21:37

Andrea Ambu

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Python string formatting

3 Answers3

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