The length in bytes of one array item in the internal representation.
- .. method:: append(x)
+ .. method:: append(value, /)
- Append a new item with value *x* to the end of the array.
+ Append a new item with the specified value to the end of the array.
.. method:: buffer_info()
components (the real part, followed by imaginary part) is preserved.
- .. method:: count(x)
+ .. method:: count(value, /)
- Return the number of occurrences of *x* in the array.
+ Return the number of occurrences of *value* in the array.
- .. method:: extend(iterable)
+ .. method:: extend(iterable, /)
Append items from *iterable* to the end of the array. If *iterable* is another
array, it must have *exactly* the same type code; if not, :exc:`TypeError` will
must be the right type to be appended to the array.
- .. method:: frombytes(buffer)
+ .. method:: frombytes(buffer, /)
Appends items from the :term:`bytes-like object`, interpreting
its content as an array of machine values (as if it had been read
:meth:`!fromstring` is renamed to :meth:`frombytes` for clarity.
- .. method:: fromfile(f, n)
+ .. method:: fromfile(f, n, /)
Read *n* items (as machine values) from the :term:`file object` *f* and append
them to the end of the array. If less than *n* items are available,
inserted into the array.
- .. method:: fromlist(list)
+ .. method:: fromlist(list, /)
Append items from the list. This is equivalent to ``for x in list:
a.append(x)`` except that if there is a type error, the array is unchanged.
- .. method:: fromunicode(s)
+ .. method:: fromunicode(ustr, /)
Extends this array with data from the given Unicode string.
The array must have type code ``'u'`` or ``'w'``; otherwise a :exc:`ValueError` is raised.
array of some other type.
- .. method:: index(x[, start[, stop]])
+ .. method:: index(value[, start[, stop]])
Return the smallest *i* such that *i* is the index of the first occurrence of
- *x* in the array. The optional arguments *start* and *stop* can be
- specified to search for *x* within a subsection of the array. Raise
- :exc:`ValueError` if *x* is not found.
+ *value* in the array. The optional arguments *start* and *stop* can be
+ specified to search for *value* within a subsection of the array. Raise
+ :exc:`ValueError` if *value* is not found.
.. versionchanged:: 3.10
Added optional *start* and *stop* parameters.
- .. method:: insert(i, x)
+ .. method:: insert(index, value, /)
- Insert a new item with value *x* in the array before position *i*. Negative
+ Insert a new item *value* in the array before position *index*. Negative
values are treated as being relative to the end of the array.
- .. method:: pop([i])
+ .. method:: pop(index=-1, /)
Removes the item with the index *i* from the array and returns it. The optional
argument defaults to ``-1``, so that by default the last item is removed and
returned.
- .. method:: remove(x)
+ .. method:: remove(value, /)
- Remove the first occurrence of *x* from the array.
+ Remove the first occurrence of *value* from the array.
.. method:: clear()
:meth:`!tostring` is renamed to :meth:`tobytes` for clarity.
- .. method:: tofile(f)
+ .. method:: tofile(f, /)
Write all items (as machine values) to the :term:`file object` *f*.
[('the', 1143), ('and', 966), ('to', 762), ('of', 669), ('i', 631),
('you', 554), ('a', 546), ('my', 514), ('hamlet', 471), ('in', 451)]
-.. class:: Counter([iterable-or-mapping])
+.. class:: Counter(**kwargs)
+ Counter(iterable, /, **kwargs)
+ Counter(mapping, /, **kwargs)
A :class:`Counter` is a :class:`dict` subclass for counting :term:`hashable` objects.
It is a collection where elements are stored as dictionary keys
>>> sorted(c.elements())
['a', 'a', 'a', 'a', 'b', 'b']
- .. method:: most_common([n])
+ .. method:: most_common(n=None)
Return a list of the *n* most common elements and their counts from the
most common to the least. If *n* is omitted or ``None``,
>>> Counter('abracadabra').most_common(3)
[('a', 5), ('b', 2), ('r', 2)]
- .. method:: subtract([iterable-or-mapping])
+ .. method:: subtract(**kwargs)
+ subtract(iterable, /, **kwargs)
+ subtract(mapping, /, **kwargs)
Elements are subtracted from an *iterable* or from another *mapping*
(or counter). Like :meth:`dict.update` but subtracts counts instead
This class method is not implemented for :class:`Counter` objects.
- .. method:: update([iterable-or-mapping])
+ .. method:: update(**kwargs)
+ update(iterable, /, **kwargs)
+ update(mapping, /, **kwargs)
Elements are counted from an *iterable* or added-in from another
*mapping* (or counter). Like :meth:`dict.update` but adds counts
Deque objects support the following methods:
- .. method:: append(x)
+ .. method:: append(item, /)
- Add *x* to the right side of the deque.
+ Add *item* to the right side of the deque.
- .. method:: appendleft(x)
+ .. method:: appendleft(item, /)
- Add *x* to the left side of the deque.
+ Add *item* to the left side of the deque.
.. method:: clear()
.. versionadded:: 3.5
- .. method:: count(x)
+ .. method:: count(value, /)
- Count the number of deque elements equal to *x*.
+ Count the number of deque elements equal to *value*.
.. versionadded:: 3.2
- .. method:: extend(iterable)
+ .. method:: extend(iterable, /)
Extend the right side of the deque by appending elements from the iterable
argument.
- .. method:: extendleft(iterable)
+ .. method:: extendleft(iterable, /)
Extend the left side of the deque by appending elements from *iterable*.
Note, the series of left appends results in reversing the order of
elements in the iterable argument.
- .. method:: index(x[, start[, stop]])
+ .. method:: index(value[, start[, stop]])
- Return the position of *x* in the deque (at or after index *start*
+ Return the position of *value* in the deque (at or after index *start*
and before index *stop*). Returns the first match or raises
:exc:`ValueError` if not found.
.. versionadded:: 3.5
- .. method:: insert(i, x)
+ .. method:: insert(index, value, /)
- Insert *x* into the deque at position *i*.
+ Insert *value* into the deque at position *index*.
If the insertion would cause a bounded deque to grow beyond *maxlen*,
an :exc:`IndexError` is raised.
elements are present, raises an :exc:`IndexError`.
- .. method:: remove(value)
+ .. method:: remove(value, /)
Remove the first occurrence of *value*. If not found, raises a
:exc:`ValueError`.
.. versionadded:: 3.2
- .. method:: rotate(n=1)
+ .. method:: rotate(n=1, /)
Rotate the deque *n* steps to the right. If *n* is negative, rotate
to the left.
:class:`defaultdict` objects
----------------------------
-.. class:: defaultdict(default_factory=None, /, [...])
+.. class:: defaultdict(default_factory=None, /, **kwargs)
+ defaultdict(default_factory, mapping, /, **kwargs)
+ defaultdict(default_factory, iterable, /, **kwargs)
Return a new dictionary-like object. :class:`defaultdict` is a subclass of the
built-in :class:`dict` class. It overrides one method and adds one writable
:class:`defaultdict` objects support the following method in addition to the
standard :class:`dict` operations:
- .. method:: __missing__(key)
+ .. method:: __missing__(key, /)
If the :attr:`default_factory` attribute is ``None``, this raises a
:exc:`KeyError` exception with the *key* as argument.
three additional methods and two attributes. To prevent conflicts with
field names, the method and attribute names start with an underscore.
-.. classmethod:: somenamedtuple._make(iterable)
+.. classmethod:: somenamedtuple._make(iterable, /)
Class method that makes a new instance from an existing sequence or iterable.
* Until Python 3.8, :class:`dict` lacked a :meth:`~object.__reversed__` method.
-.. class:: OrderedDict([items])
+.. class:: OrderedDict(**kwargs)
+ OrderedDict(mapping, /, **kwargs)
+ OrderedDict(iterable, /, **kwargs)
Return an instance of a :class:`dict` subclass that has methods
specialized for rearranging dictionary order.
to work with because the underlying dictionary is accessible as an
attribute.
-.. class:: UserDict([initialdata])
+.. class:: UserDict(**kwargs)
+ UserDict(mapping, /, **kwargs)
+ UserDict(iterable, /, **kwargs)
Class that simulates a dictionary. The instance's contents are kept in a
regular dictionary, which is accessible via the :attr:`data` attribute of
- :class:`UserDict` instances. If *initialdata* is provided, :attr:`data` is
- initialized with its contents; note that a reference to *initialdata* will not
- be kept, allowing it to be used for other purposes.
+ :class:`!UserDict` instances. If arguments are provided, they are used to
+ initialize :attr:`data`, like a regular dictionary.
In addition to supporting the methods and operations of mappings,
- :class:`UserDict` instances provide the following attribute:
+ :class:`!UserDict` instances provide the following attribute:
.. attribute:: data
The :ref:`list <typesseq-list>` data type has some more methods. Here are all
of the methods of list objects:
-.. method:: list.append(x)
+.. method:: list.append(value, /)
:noindex:
Add an item to the end of the list. Similar to ``a[len(a):] = [x]``.
-.. method:: list.extend(iterable)
+.. method:: list.extend(iterable, /)
:noindex:
Extend the list by appending all the items from the iterable. Similar to
``a[len(a):] = iterable``.
-.. method:: list.insert(i, x)
+.. method:: list.insert(index, value, /)
:noindex:
Insert an item at a given position. The first argument is the index of the
the list, and ``a.insert(len(a), x)`` is equivalent to ``a.append(x)``.
-.. method:: list.remove(x)
+.. method:: list.remove(value, /)
:noindex:
- Remove the first item from the list whose value is equal to *x*. It raises a
+ Remove the first item from the list whose value is equal to *value*. It raises a
:exc:`ValueError` if there is no such item.
-.. method:: list.pop([i])
+.. method:: list.pop(index=-1, /)
:noindex:
Remove the item at the given position in the list, and return it. If no index
Remove all items from the list. Similar to ``del a[:]``.
-.. method:: list.index(x[, start[, end]])
+.. method:: list.index(value[, start[, stop]])
:noindex:
- Return zero-based index of the first occurrence of *x* in the list.
+ Return zero-based index of the first occurrence of *value* in the list.
Raises a :exc:`ValueError` if there is no such item.
The optional arguments *start* and *end* are interpreted as in the slice
sequence rather than the *start* argument.
-.. method:: list.count(x)
+.. method:: list.count(value, /)
:noindex:
- Return the number of times *x* appears in the list.
+ Return the number of times *value* appears in the list.
.. method:: list.sort(*, key=None, reverse=False)
projects / thirdparty / Python / cpython.git / commitdiff
