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| -rw-r--r-- | Doc/library/functions.rst | 62 |
1 files changed, 52 insertions, 10 deletions
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index 925da50..4e48e42 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -81,9 +81,24 @@ are always available. They are listed here in alphabetical order. .. function:: bin(x) - Convert an integer number to a binary string. The result is a valid Python - expression. If *x* is not a Python :class:`int` object, it has to define an - :meth:`__index__` method that returns an integer. + Convert an integer number to a binary string prefixed with "0b". The result + is a valid Python expression. If *x* is not a Python :class:`int` object, it + has to define an :meth:`__index__` method that returns an integer. Some + examples: + + >>> bin(3) + '0b11' + >>> bin(-10) + '-0b1010' + + If prefix "0b" is desired or not, you can use either of the following ways. + + >>> format(14, '#b'), format(14, 'b') + ('0b1110', '1110') + >>> f'{14:#b}', f'{14:b}' + ('0b1110', '1110') + + See also :func:`format` for more information. .. class:: bool([x]) @@ -635,16 +650,26 @@ are always available. They are listed here in alphabetical order. .. function:: hex(x) - Convert an integer number to a lowercase hexadecimal string - prefixed with "0x", for example: + Convert an integer number to a lowercase hexadecimal string prefixed with + "0x". If x is not a Python :class:`int` object, it has to define an + __index__() method that returns an integer. Some examples: >>> hex(255) '0xff' >>> hex(-42) '-0x2a' - If x is not a Python :class:`int` object, it has to define an __index__() - method that returns an integer. + If you want to convert an integer number to an uppercase or lower hexadecimal + string with prefix or not, you can use either of the following ways: + + >>> '%#x' % 255, '%x' % 255, '%X' % 255 + ('0xff', 'ff', 'FF') + >>> format(255, '#x'), format(255, 'x'), format(255, 'X') + ('0xff', 'ff', 'FF') + >>> f'{255:#x}', f'{255:x}', f'{255:X}' + ('0xff', 'ff', 'FF') + + See also :func:`format` for more information. See also :func:`int` for converting a hexadecimal string to an integer using a base of 16. @@ -878,10 +903,27 @@ are always available. They are listed here in alphabetical order. .. function:: oct(x) - Convert an integer number to an octal string. The result is a valid Python - expression. If *x* is not a Python :class:`int` object, it has to define an - :meth:`__index__` method that returns an integer. + Convert an integer number to an octal string prefixed with "0o". The result + is a valid Python expression. If *x* is not a Python :class:`int` object, it + has to define an :meth:`__index__` method that returns an integer. For + example: + + >>> oct(8) + '0o10' + >>> oct(-56) + '-0o70' + + If you want to convert an integer number to octal string either with prefix + "0o" or not, you can use either of the following ways. + + >>> '%#o' % 10, '%o' % 10 + ('0o12', '12') + >>> format(10, '#o'), format(10, 'o') + ('0o12', '12') + >>> f'{10:#o}', f'{10:o}' + ('0o12', '12') + See also :func:`format` for more information. .. index:: single: file object; open() built-in function |