https://github.com/python/cpython/commit/4dfba854ec9217e1a162c60187b00aa2f0564569 commit: 4dfba854ec9217e1a162c60187b00aa2f0564569 branch: 3.12 author: Miss Islington (bot) <[email protected]> committer: encukou <[email protected]> date: 2024-05-21T19:54:20+02:00 summary:
[3.12] GH-110383: Improve Tutorial for Input Ouput (GH-119230) (GH-119327) GH-110383: Improve Tutorial for Input Ouput (GH-119230) (cherry picked from commit 9db2fd7edaa9d03e8c649c3bb0e8d963233cde22) Co-authored-by: Blaise Pabon <[email protected]> Co-authored-by: edson duarte <[email protected]> files: M Doc/tutorial/inputoutput.rst diff --git a/Doc/tutorial/inputoutput.rst b/Doc/tutorial/inputoutput.rst index fe9ca9ccb9c7e0..857068a51ab843 100644 --- a/Doc/tutorial/inputoutput.rst +++ b/Doc/tutorial/inputoutput.rst @@ -37,16 +37,23 @@ printing space-separated values. There are several ways to format output. * The :meth:`str.format` method of strings requires more manual effort. You'll still use ``{`` and ``}`` to mark where a variable will be substituted and can provide detailed formatting directives, - but you'll also need to provide the information to be formatted. + but you'll also need to provide the information to be formatted. In the following code + block there are two examples of how to format variables: + :: >>> yes_votes = 42_572_654 - >>> no_votes = 43_132_495 - >>> percentage = yes_votes / (yes_votes + no_votes) + >>> total_votes = 85_705_149 + >>> percentage = yes_votes / total_votes >>> '{:-9} YES votes {:2.2%}'.format(yes_votes, percentage) ' 42572654 YES votes 49.67%' + Notice how the ``yes_votes`` are padded with spaces and a negative sign only for negative numbers. + The example also prints ``percentage`` multiplied by 100, with 2 decimal + places and followed by a percent sign (see :ref:`formatspec` for details). + + * Finally, you can do all the string handling yourself by using string slicing and concatenation operations to create any layout you can imagine. The string type has some methods that perform useful operations for padding @@ -197,7 +204,12 @@ notation. :: Jack: 4098; Sjoerd: 4127; Dcab: 8637678 This is particularly useful in combination with the built-in function -:func:`vars`, which returns a dictionary containing all local variables. +:func:`vars`, which returns a dictionary containing all local variables:: + + >>> table = {k: str(v) for k, v in vars().items()} + >>> message = " ".join([f'{k}: ' + '{' + k +'};' for k in table.keys()]) + >>> print(message.format(**table)) + __name__: __main__; __doc__: None; __package__: None; __loader__: ... As an example, the following lines produce a tidily aligned set of columns giving integers and their squares and cubes:: _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-checkins.python.org/ Member address: [email protected]
