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.. testsetup::
from packaging.specifiers import Specifier, SpecifierSet, InvalidSpecifier
from packaging.version import Version
� N) �Callable�Iterable�Iterator�List�Optional�Set�Tuple�TypeVar�Union� )�canonicalize_version)�Version�UnparsedVersionVar)�bound�version�returnc �< � t | t � s t | � } | S �N)�
isinstancer )r s �I/usr/lib/python3/dist-packages/setuptools/_vendor/packaging/specifiers.py�_coerce_versionr " s � � �g�w� '��'�"�� �N� c � � e Zd ZdZy)�InvalidSpecifiera
Raised when attempting to create a :class:`Specifier` with a specifier
string that is invalid.
>>> Specifier("lolwat")
Traceback (most recent call last):
...
packaging.specifiers.InvalidSpecifier: Invalid specifier: 'lolwat'
N)�__name__�
__module__� __qualname__�__doc__� r r r r ( s � �r r c �x � e Zd Zej defd�� Zej defd�� Zej de de
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BaseSpecifierr c � � y)z�
Returns the str representation of this Specifier-like object. This
should be representative of the Specifier itself.
Nr ��selfs r �__str__zBaseSpecifier.__str__5 � � r c � � y)zF
Returns a hash value for this Specifier-like object.
Nr r# s r �__hash__zBaseSpecifier.__hash__< r& r �otherc � � y)z�
Returns a boolean representing whether or not the two Specifier-like
objects are equal.
:param other: The other object to check against.
Nr �r$ r) s r �__eq__zBaseSpecifier.__eq__B r& r c � � y)z�Whether or not pre-releases as a whole are allowed.
This can be set to either ``True`` or ``False`` to explicitly enable or disable
prereleases or it can be set to ``None`` (the default) to use default semantics.
Nr r# s r � prereleaseszBaseSpecifier.prereleasesK r& r �valueNc � � y)zQSetter for :attr:`prereleases`.
:param value: The value to set.
Nr �r$ r/ s r r. zBaseSpecifier.prereleasesT r& r �itemr. c � � y)zR
Determines if the given item is contained within this specifier.
Nr )r$ r2 r. s r �containszBaseSpecifier.contains[ r& r �iterablec � � y)z�
Takes an iterable of items and filters them so that only items which
are contained within this specifier are allowed in it.
Nr )r$ r5 r. s r �filterzBaseSpecifier.filtera r& r r )r r r �abc�abstractmethod�strr% �intr( �object�boolr, �propertyr r. �setterr4 r r r r7 r r r r! r! 4 s7 � ���� �� � � � ��� �#� � � �
��� �F� �t� � � � ���� �X�d�^� � � � � ��� �� �$� � � � ��� �S� �x��~� �� � � �
���TX� � �!3�4� �CK�D�>� � �$� %� � � r r! )� metaclassc � � e Zd ZdZdZdZ ej dez ez dz ej ej z � Z
dddd d
d d d
d�Z d0de de
e ddfd�Zedefd�� Zej$ deddfd�� Zede fd�� Zede fd�� Zde fd�Zde fd�Zedee e f fd�� Zdefd �Zd edefd �Z d e de fd �Z d!e de defd"�Z d!e de defd#�Z!d!e de defd$�Z"d!e de defd%�Z#d!e de defd&�Z$d!e d'e defd(�Z%d!e d'e defd)�Z&d!e de defd*�Z'd+e(e e f defd,�Z) d1d+e*de
e defd-�Z+ d1d.e,e- de
e de.e- fd/�Z/y)2� Specifiera? This class abstracts handling of version specifiers.
.. tip::
It is generally not required to instantiate this manually. You should instead
prefer to work with :class:`SpecifierSet` instead, which can parse
comma-separated version specifiers (which is what package metadata contains).
z8
(?P<operator>(~=|==|!=|<=|>=|<|>|===))
a�
(?P<version>
(?:
# The identity operators allow for an escape hatch that will
# do an exact string match of the version you wish to install.
# This will not be parsed by PEP 440 and we cannot determine
# any semantic meaning from it. This operator is discouraged
# but included entirely as an escape hatch.
(?<====) # Only match for the identity operator
\s*
[^\s;)]* # The arbitrary version can be just about anything,
# we match everything except for whitespace, a
# semi-colon for marker support, and a closing paren
# since versions can be enclosed in them.
)
|
(?:
# The (non)equality operators allow for wild card and local
# versions to be specified so we have to define these two
# operators separately to enable that.
(?<===|!=) # Only match for equals and not equals
\s*
v?
(?:[0-9]+!)? # epoch
[0-9]+(?:\.[0-9]+)* # release
# You cannot use a wild card and a pre-release, post-release, a dev or
# local version together so group them with a | and make them optional.
(?:
\.\* # Wild card syntax of .*
|
(?: # pre release
[-_\.]?
(alpha|beta|preview|pre|a|b|c|rc)
[-_\.]?
[0-9]*
)?
(?: # post release
(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
)?
(?:[-_\.]?dev[-_\.]?[0-9]*)? # dev release
(?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
)?
)
|
(?:
# The compatible operator requires at least two digits in the
# release segment.
(?<=~=) # Only match for the compatible operator
\s*
v?
(?:[0-9]+!)? # epoch
[0-9]+(?:\.[0-9]+)+ # release (We have a + instead of a *)
(?: # pre release
[-_\.]?
(alpha|beta|preview|pre|a|b|c|rc)
[-_\.]?
[0-9]*
)?
(?: # post release
(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
)?
(?:[-_\.]?dev[-_\.]?[0-9]*)? # dev release
)
|
(?:
# All other operators only allow a sub set of what the
# (non)equality operators do. Specifically they do not allow
# local versions to be specified nor do they allow the prefix
# matching wild cards.
(?<!==|!=|~=) # We have special cases for these
# operators so we want to make sure they
# don't match here.
\s*
v?
(?:[0-9]+!)? # epoch
[0-9]+(?:\.[0-9]+)* # release
(?: # pre release
[-_\.]?
(alpha|beta|preview|pre|a|b|c|rc)
[-_\.]?
[0-9]*
)?
(?: # post release
(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
)?
(?:[-_\.]?dev[-_\.]?[0-9]*)? # dev release
)
)
z^\s*z\s*$�
compatible�equal� not_equal�less_than_equal�greater_than_equal� less_than� greater_than� arbitrary)�~=�==z!=�<=�>=�<�>�===N�specr. r c �� � | j j |� }|st d|� d�� �|j d� j � |j d� j � f| _ || _ y)a� Initialize a Specifier instance.
:param spec:
The string representation of a specifier which will be parsed and
normalized before use.
:param prereleases:
This tells the specifier if it should accept prerelease versions if
applicable or not. The default of ``None`` will autodetect it from the
given specifiers.
:raises InvalidSpecifier:
If the given specifier is invalid (i.e. bad syntax).
zInvalid specifier: '�'�operatorr N)�_regex�searchr �group�strip�_spec� _prereleases)r$ rR r. �matchs r �__init__zSpecifier.__init__� so � � � � �"�"�4�(���"�%9�$��q�#A�B� B�
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��
� (��r c � � | j � | j S | j \ }}|dv r1|dk( r|j d� r|d d }t |� j ryy)N)rL rN rM rK rQ rL �.*���TF)r[ rZ �endswithr �
is_prerelease)r$ rU r s r r. zSpecifier.prereleases sm � � � � � (��$�$� $�
!�J�J���'� �6� 6� �4� �G�$4�$4�T�$:�!�#�2�,�� �w� �-�-��r r/ c � � || _ y r �r[ r1 s r r. zSpecifier.prereleases �
� � !��r c � � | j d S )z`The operator of this specifier.
>>> Specifier("==1.2.3").operator
'=='
r �rZ r# s r rU zSpecifier.operator � � � �z�z�!�}� r c � � | j d S )zaThe version of this specifier.
>>> Specifier("==1.2.3").version
'1.2.3'
r rg r# s r r zSpecifier.version% rh r c � � | j �d| j ��nd}d| j j � dt | � �|� d�S )aT A representation of the Specifier that shows all internal state.
>>> Specifier('>=1.0.0')
<Specifier('>=1.0.0')>
>>> Specifier('>=1.0.0', prereleases=False)
<Specifier('>=1.0.0', prereleases=False)>
>>> Specifier('>=1.0.0', prereleases=True)
<Specifier('>=1.0.0', prereleases=True)>
�, prereleases=� rO �(�)>)r[ r. � __class__r r: �r$ �pres r �__repr__zSpecifier.__repr__. sU � � � � �,� �T� -� -� 0� 1�� � �4�>�>�*�*�+�1�S��Y�M�#��b�A�Ar c �4 � dj | j � S )z�A string representation of the Specifier that can be round-tripped.
>>> str(Specifier('>=1.0.0'))
'>=1.0.0'
>>> str(Specifier('>=1.0.0', prereleases=False))
'>=1.0.0'
z{}{})�formatrZ r# s r r% zSpecifier.__str__@ s � � �v�}�}�d�j�j�)�)r c �x � t | j d | j d dk7 �� }| j d |fS )Nr r rK ��strip_trailing_zero)r
rZ )r$ �canonical_versions r �_canonical_speczSpecifier._canonical_specJ s> � � 0� �J�J�q�M�!%���A� �$�!6�
�� �z�z�!�}� /�/�/r c �, � t | j � S r )�hashry r# s r r( zSpecifier.__hash__R s � ��D�(�(�)�)r r) c �� � t |t � r | j t |� � }n t || j � st S | j
|j
k( S # t $ r t cY S w xY w)a> Whether or not the two Specifier-like objects are equal.
:param other: The other object to check against.
The value of :attr:`prereleases` is ignored.
>>> Specifier("==1.2.3") == Specifier("== 1.2.3.0")
True
>>> (Specifier("==1.2.3", prereleases=False) ==
... Specifier("==1.2.3", prereleases=True))
True
>>> Specifier("==1.2.3") == "==1.2.3"
True
>>> Specifier("==1.2.3") == Specifier("==1.2.4")
False
>>> Specifier("==1.2.3") == Specifier("~=1.2.3")
False
)r r: ro r �NotImplementedry r+ s r r, zSpecifier.__eq__U si � �& �e�S� !�
&� ���s�5�z�2�� �E�4�>�>�2�!� !��#�#�u�'<�'<�<�<�� $�
&�%�%�
&�s �A" �"A4�3A4�opc �> � t | d| j | � �� }|S )N� _compare_)�getattr�
_operators)r$ r~ �operator_callables r �
_get_operatorzSpecifier._get_operatorr s+ � �.5� �I�d�o�o�b� 1� 2�3�/
�� !� r � prospectivec
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d� ||� S )N�.���r_ rN rL )�join�list� itertools� takewhile�_is_not_suffix�_version_splitr� )r$ r� rR �prefixs r �_compare_compatiblez Specifier._compare_compatiblex s{ � � ��� ��$�$�^�^�D�5I�J� K�C�R� P�
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�$���'�t�!�!�$�'� �T�:�
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|
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k( S )Nr_ Frv r` )ra r
�publicr� � _pad_version�lenr �local) r$ r� rR �normalized_prospective�normalized_spec�
split_spec�split_prospective�padded_prospective�_�shortened_prospective� spec_versions r �_compare_equalzSpecifier._compare_equal� s� � � �=�=�� �%9��"�"��&� "� 3�4���9�RW� X�O� (��8�J�
!/�/E� F� � %1�1B�J�$O� !� ��
%7�7H��Z� �$I� !�(�J�6� 6� #�4�=�L�
�%�%� %�k�&8�&8� 9� � �,�.� .r c �( � | j ||� S r )r� �r$ r� rR s r �_compare_not_equalz Specifier._compare_not_equal� s � ��&�&�{�D�9�9�9r c �D � t |j � t |� k S r �r r� r� s r �_compare_less_than_equalz"Specifier._compare_less_than_equal� � � �
�{�)�)�*�g�d�m�;�;r c �D � t |j � t |� k\ S r r� r� s r �_compare_greater_than_equalz%Specifier._compare_greater_than_equal� r� r �spec_strc � � t |� }||k sy|j s8|j r,t |j � t |j � k( ryy�NFT)r rb � base_version�r$ r� r� rR s r �_compare_less_thanz Specifier._compare_less_than� sT � � �x� ��
�T�!�� �!�!�k�&?�&?��{�/�/�0�G�D�<M�<M�4N�N� �
r c � � t |� }||kD sy|j s8|j r,t |j � t |j � k( ry|j �,t |j � t |j � k( ryyr� )r �is_postreleaser� r� r� s r �_compare_greater_thanz Specifier._compare_greater_than� s� � � �x� ��
�T�!�� �"�"�{�'A�'A��{�/�/�0�G�D�<M�<M�4N�N� � � � � (��{�/�/�0�G�D�<M�<M�4N�N� �
r c �h � t |� j � t |� j � k( S r )r: �lowerr� s r �_compare_arbitraryz Specifier._compare_arbitrary� s& � ��;� �%�%�'�3�t�9�?�?�+<�<�<r r2 c �$ � | j |� S )a; Return whether or not the item is contained in this specifier.
:param item: The item to check for.
This is used for the ``in`` operator and behaves the same as
:meth:`contains` with no ``prereleases`` argument passed.
>>> "1.2.3" in Specifier(">=1.2.3")
True
>>> Version("1.2.3") in Specifier(">=1.2.3")
True
>>> "1.0.0" in Specifier(">=1.2.3")
False
>>> "1.3.0a1" in Specifier(">=1.2.3")
False
>>> "1.3.0a1" in Specifier(">=1.2.3", prereleases=True)
True
�r4 �r$ r2 s r � __contains__zSpecifier.__contains__ � � �& �}�}�T�"�"r c � � |� | j }t |� }|j r|sy| j | j � } ||| j
� S )al Return whether or not the item is contained in this specifier.
:param item:
The item to check for, which can be a version string or a
:class:`Version` instance.
:param prereleases:
Whether or not to match prereleases with this Specifier. If set to
``None`` (the default), it uses :attr:`prereleases` to determine
whether or not prereleases are allowed.
>>> Specifier(">=1.2.3").contains("1.2.3")
True
>>> Specifier(">=1.2.3").contains(Version("1.2.3"))
True
>>> Specifier(">=1.2.3").contains("1.0.0")
False
>>> Specifier(">=1.2.3").contains("1.3.0a1")
False
>>> Specifier(">=1.2.3", prereleases=True).contains("1.3.0a1")
True
>>> Specifier(">=1.2.3").contains("1.3.0a1", prereleases=True)
True
F)r. r rb r� rU r )r$ r2 r. �normalized_itemr� s r r4 zSpecifier.contains sY � �8 � � �*�*�K� *�$�/��
� (� (��� /3�.@�.@�� � �.O�� � �$�,�,�?�?r r5 c # � K � d}g }d|�|ndi}|D ]S }t |� } | j |fi |��s�"|j r |s | j s|j |� �Nd}|�� �U |s|r |D ] }|�� � yyy�w)aO Filter items in the given iterable, that match the specifier.
:param iterable:
An iterable that can contain version strings and :class:`Version` instances.
The items in the iterable will be filtered according to the specifier.
:param prereleases:
Whether or not to allow prereleases in the returned iterator. If set to
``None`` (the default), it will be intelligently decide whether to allow
prereleases or not (based on the :attr:`prereleases` attribute, and
whether the only versions matching are prereleases).
This method is smarter than just ``filter(Specifier().contains, [...])``
because it implements the rule from :pep:`440` that a prerelease item
SHOULD be accepted if no other versions match the given specifier.
>>> list(Specifier(">=1.2.3").filter(["1.2", "1.3", "1.5a1"]))
['1.3']
>>> list(Specifier(">=1.2.3").filter(["1.2", "1.2.3", "1.3", Version("1.4")]))
['1.2.3', '1.3', <Version('1.4')>]
>>> list(Specifier(">=1.2.3").filter(["1.2", "1.5a1"]))
['1.5a1']
>>> list(Specifier(">=1.2.3").filter(["1.3", "1.5a1"], prereleases=True))
['1.3', '1.5a1']
>>> list(Specifier(">=1.2.3", prereleases=True).filter(["1.3", "1.5a1"]))
['1.3', '1.5a1']
Fr. NT)r r4 rb r. �append)r$ r5 r. �yielded�found_prereleases�kwr �parsed_versions r r7 zSpecifier.filterE s� � �� �< �� ���K�,C�[��
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� z � t t j |� � t t j |� � fS )Nc �" � | j � S r ��isdigit��xs r �<lambda>z _pad_version.<locals>.<lambda>� s � ����� r c �" � | j � S r r� r� s r r� z _pad_version.<locals>.<lambda>� s � �!�)�)�+� r r r �0)r� r� r� r� r� �insert�max�chain)r� r� �
left_split� right_splits r r� r� � s" � � �"� �J� ���d�9�.�.�/D�d�K�L�M����t�I� /� /�0E�u� M�N�O� ���d�3�z�!�}�-�/�0�1����u�S��Q� � 0� 2�3�4� ���a�#���Q��K��N�(;�c�*�Q�-�>P�(P�!Q�Q�R����q�3�%�#�a��Z��]�);�c�+�a�.�>Q�)Q�"R�R�S� �� � �*�-� .��Y�_�_�k�5R�0S� T�Tr c �H � e Zd ZdZ ddedee ddfd�Zedee fd�� Z e j deddfd �� Z defd
�Z defd �Z de
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ed ef dd fd�Zd
edefd�Zde
fd�Zdee fd�Zdedefd�Z ddedee dee defd�Z ddee dee dee fd�Z y)� SpecifierSetz�This class abstracts handling of a set of version specifiers.
It can be passed a single specifier (``>=3.0``), a comma-separated list of
specifiers (``>=3.0,!=3.1``), or no specifier at all.
N�
specifiersr. r c � � |j d� D �cg c]# }|j � s�|j � ��% }}t � }|D ] }|j t |� � � t |� | _ || _ yc c}w )aN Initialize a SpecifierSet instance.
:param specifiers:
The string representation of a specifier or a comma-separated list of
specifiers which will be parsed and normalized before use.
:param prereleases:
This tells the SpecifierSet if it should accept prerelease versions if
applicable or not. The default of ``None`` will autodetect it from the
given specifiers.
:raises InvalidSpecifier:
If the given ``specifiers`` are not parseable than this exception will be
raised.
�,N)r� rY �set�addrB � frozenset�_specsr[ )r$ r� r. �s�split_specifiers�parsed� specifiers r r] zSpecifierSet.__init__� sx � �( 0:�/?�/?��/D�R�!���� �A�G�G�I�R��R� "%���)� -�I� �J�J�y��+� ,� -� ��'�� � (���� Ss
�B�Bc � � | j � | j S | j sy t d� | j D � � S )Nc 3 �4 K � | ] }|j �� � y �wr �r. �r� r� s r r� z+SpecifierSet.prereleases.<locals>.<genexpr>� s � �� �6�Q�1�=�=�6�s �)r[ r� r� r# s r r. zSpecifierSet.prereleases� s? � � � � � (��$�$� $�
�{�{�� �6�$�+�+�6�6�6r r/ c � � || _ y r rd r1 s r r. zSpecifierSet.prereleases� re r c �^ � | j �d| j ��nd}dt | � �|� d�S )a A representation of the specifier set that shows all internal state.
Note that the ordering of the individual specifiers within the set may not
match the input string.
>>> SpecifierSet('>=1.0.0,!=2.0.0')
<SpecifierSet('!=2.0.0,>=1.0.0')>
>>> SpecifierSet('>=1.0.0,!=2.0.0', prereleases=False)
<SpecifierSet('!=2.0.0,>=1.0.0', prereleases=False)>
>>> SpecifierSet('>=1.0.0,!=2.0.0', prereleases=True)
<SpecifierSet('!=2.0.0,>=1.0.0', prereleases=True)>
rk rl z<SpecifierSet(rn )r[ r. r: rp s r rr zSpecifierSet.__repr__� sD � � � � �,� �T� -� -� 0� 1�� � ��D� �}�S�E��4�4r c �X � dj t d� | j D � � � S )an A string representation of the specifier set that can be round-tripped.
Note that the ordering of the individual specifiers within the set may not
match the input string.
>>> str(SpecifierSet(">=1.0.0,!=1.0.1"))
'!=1.0.1,>=1.0.0'
>>> str(SpecifierSet(">=1.0.0,!=1.0.1", prereleases=False))
'!=1.0.1,>=1.0.0'
r� c 3 �2 K � | ] }t |� �� � y �wr )r: r� s r r� z'SpecifierSet.__str__.<locals>.<genexpr> s � �� � ;�!�s�1�v� ;�s �)r� �sortedr� r# s r r% zSpecifierSet.__str__� s" � � �x�x�� ;�t�{�{� ;�;�<�<r c �, � t | j � S r )r{ r� r# s r r( zSpecifierSet.__hash__
s � ��D�K�K� � r r) c �� � t |t � r t |� }nt |t � st S t � }t | j
|j
z � |_ | j � |j �|j |_ |S | j � |j �| j |_ |S | j |j k( r| j |_ |S t d� �)a� Return a SpecifierSet which is a combination of the two sets.
:param other: The other object to combine with.
>>> SpecifierSet(">=1.0.0,!=1.0.1") & '<=2.0.0,!=2.0.1'
<SpecifierSet('!=1.0.1,!=2.0.1,<=2.0.0,>=1.0.0')>
>>> SpecifierSet(">=1.0.0,!=1.0.1") & SpecifierSet('<=2.0.0,!=2.0.1')
<SpecifierSet('!=1.0.1,!=2.0.1,<=2.0.0,>=1.0.0')>
zFCannot combine SpecifierSets with True and False prerelease overrides.)r r: r� r} r� r� r[ �
ValueError)r$ r) r� s r �__and__zSpecifierSet.__and__
s� � � �e�S� !� ��'�E��E�<�0�!� !� �N� �$�T�[�[�5�<�<�%?�@� �� � � � $��);�);�)G�%*�%7�%7�I� "� �� �
�
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*�u�/A�/A�/I�%)�%6�%6�I� "� �� �
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r c � � t |t t f� rt t |� � }nt |t � st S | j
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k( S )a� Whether or not the two SpecifierSet-like objects are equal.
:param other: The other object to check against.
The value of :attr:`prereleases` is ignored.
>>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0,!=1.0.1")
True
>>> (SpecifierSet(">=1.0.0,!=1.0.1", prereleases=False) ==
... SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True))
True
>>> SpecifierSet(">=1.0.0,!=1.0.1") == ">=1.0.0,!=1.0.1"
True
>>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0")
False
>>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0,!=1.0.2")
False
)r r: rB r� r} r� r+ s r r, zSpecifierSet.__eq__- sD � �& �e�c�9� -� .� ��U��,�E��E�<�0�!� !��{�{�e�l�l�*�*r c �, � t | j � S )z7Returns the number of specifiers in this specifier set.)r� r� r# s r �__len__zSpecifierSet.__len__G s � ��4�;�;� � r c �, � t | j � S )z�
Returns an iterator over all the underlying :class:`Specifier` instances
in this specifier set.
>>> sorted(SpecifierSet(">=1.0.0,!=1.0.1"), key=str)
[<Specifier('!=1.0.1')>, <Specifier('>=1.0.0')>]
)�iterr� r# s r �__iter__zSpecifierSet.__iter__K s � � �D�K�K� � r r2 c �$ � | j |� S )ar Return whether or not the item is contained in this specifier.
:param item: The item to check for.
This is used for the ``in`` operator and behaves the same as
:meth:`contains` with no ``prereleases`` argument passed.
>>> "1.2.3" in SpecifierSet(">=1.0.0,!=1.0.1")
True
>>> Version("1.2.3") in SpecifierSet(">=1.0.0,!=1.0.1")
True
>>> "1.0.1" in SpecifierSet(">=1.0.0,!=1.0.1")
False
>>> "1.3.0a1" in SpecifierSet(">=1.0.0,!=1.0.1")
False
>>> "1.3.0a1" in SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True)
True
r� r� s r r� zSpecifierSet.__contains__U r� r � installedc � ��� t �t � s t �� ��� | j ��s
�j ry|r!�j rt �j � �t ��fd�| j D � � S )a� Return whether or not the item is contained in this SpecifierSet.
:param item:
The item to check for, which can be a version string or a
:class:`Version` instance.
:param prereleases:
Whether or not to match prereleases with this SpecifierSet. If set to
``None`` (the default), it uses :attr:`prereleases` to determine
whether or not prereleases are allowed.
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.2.3")
True
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains(Version("1.2.3"))
True
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.0.1")
False
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.3.0a1")
False
>>> SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True).contains("1.3.0a1")
True
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.3.0a1", prereleases=True)
True
Fc 3 �D �K � | ] }|j ��� � �� � y�w)r� Nr� )r� r� r2 r. s ��r r� z(SpecifierSet.contains.<locals>.<genexpr>� s �� �� �R��1�:�:�d� �:�<�R�s � )r r r. rb r� �allr� )r$ r2 r. r
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|� t |� S t |� S )a. Filter items in the given iterable, that match the specifiers in this set.
:param iterable:
An iterable that can contain version strings and :class:`Version` instances.
The items in the iterable will be filtered according to the specifier.
:param prereleases:
Whether or not to allow prereleases in the returned iterator. If set to
``None`` (the default), it will be intelligently decide whether to allow
prereleases or not (based on the :attr:`prereleases` attribute, and
whether the only versions matching are prereleases).
This method is smarter than just ``filter(SpecifierSet(...).contains, [...])``
because it implements the rule from :pep:`440` that a prerelease item
SHOULD be accepted if no other versions match the given specifier.
>>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.3", "1.5a1"]))
['1.3']
>>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.3", Version("1.4")]))
['1.3', <Version('1.4')>]
>>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.5a1"]))
[]
>>> list(SpecifierSet(">=1.2.3").filter(["1.3", "1.5a1"], prereleases=True))
['1.3', '1.5a1']
>>> list(SpecifierSet(">=1.2.3", prereleases=True).filter(["1.3", "1.5a1"]))
['1.3', '1.5a1']
An "empty" SpecifierSet will filter items based on the presence of prerelease
versions in the set.
>>> list(SpecifierSet("").filter(["1.3", "1.5a1"]))
['1.3']
>>> list(SpecifierSet("").filter(["1.5a1"]))
['1.5a1']
>>> list(SpecifierSet("", prereleases=True).filter(["1.3", "1.5a1"]))
['1.3', '1.5a1']
>>> list(SpecifierSet("").filter(["1.3", "1.5a1"], prereleases=True))
['1.3', '1.5a1']
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