diff options
Diffstat (limited to 'Doc/library/functions.rst')
| -rw-r--r-- | Doc/library/functions.rst | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index 4371969464b..2b370691780 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -540,12 +540,13 @@ are always available. They are listed here in alphabetical order. A call to ``format(value, format_spec)`` is translated to ``type(value).__format__(format_spec)`` which bypasses the instance dictionary when searching for the value's :meth:`__format__` method. A - :exc:`TypeError` exception is raised if the method is not found or if either - the *format_spec* or the return value are not strings. + :exc:`TypeError` exception is raised if the method search reaches + :mod:`object` and the *format_spec* is non-empty, or if either the + *format_spec* or the return value are not strings. - .. versionadded:: 3.4 + .. versionchanged:: 3.4 ``object().__format__(format_spec)`` raises :exc:`TypeError` - if *format_spec* is not empty string. + if *format_spec* is not an empty string. .. _func-frozenset: @@ -609,12 +610,26 @@ are always available. They are listed here in alphabetical order. This function is added to the built-in namespace by the :mod:`site` module. + .. versionchanged:: 3.4 + Changes to :mod:`pydoc` and :mod:`inspect` mean that the reported + signatures for callables are now more comprehensive and consistent. + .. function:: hex(x) - Convert an integer number to a hexadecimal 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 lowercase hexadecimal string + prefixed with "0x", for example: + + >>> 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. + + See also :func:`int` for converting a hexadecimal string to an + integer using a base of 16. .. note:: @@ -780,6 +795,9 @@ are always available. They are listed here in alphabetical order. such as ``sorted(iterable, key=keyfunc, reverse=True)[0]`` and ``heapq.nlargest(1, iterable, key=keyfunc)``. + .. versionadded:: 3.4 + The *default* keyword-only argument. + .. _func-memoryview: .. function:: memoryview(obj) @@ -811,6 +829,9 @@ are always available. They are listed here in alphabetical order. such as ``sorted(iterable, key=keyfunc)[0]`` and ``heapq.nsmallest(1, iterable, key=keyfunc)``. + .. versionadded:: 3.4 + The *default* keyword-only argument. + .. function:: next(iterator[, default]) Retrieve the next item from the *iterator* by calling its |