gettext: python-format

 
 15.3.3 Python Format Strings
 ----------------------------
 
    There are two kinds of format strings in Python: those acceptable to
 the Python built-in format operator ‘%’, labelled as ‘python-format’,
 and those acceptable to the ‘format’ method of the ‘str’ object.
 
    Python ‘%’ format strings are described in Python Library reference /
 5. Built-in Types / 5.6. Sequence Types /
 5.6.2. String Formatting Operations.
 <https://docs.python.org/2/library/stdtypes.html#string-formatting-operations>.
 
    Python brace format strings are described in
 PEP 3101 – Advanced String Formatting,
 <https://www.python.org/dev/peps/pep-3101/>.