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:param url: url of the resource pointed to (href of the link)
:param comes_from: instance of HTMLPage where the link was found,
or string.
:param requires_python: String containing the `Requires-Python`
metadata field, specified in PEP 345. This may be specified by
a data-requires-python attribute in the HTML link tag, as
described in PEP 503.
:param yanked_reason: the reason the file has been yanked, if the
file has been yanked, or None if the file hasn't been yanked.
This is the value of the "data-yanked" attribute, if present, in
a simple repository HTML link. If the file has been yanked but
no reason was provided, this should be the empty string. See
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| j d k S)Nfile)r7 )r r" r" r# is_file s z Link.is_filec C s | j o t j j | j S)N)rN osr+ isdirr6 )r r" r" r# is_existing_dir s zLink.is_existing_dirc C s
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Link.is_wheelc C s d d l m } | j | j k S)Nr )vcs)pip._internal.vcsrS r7 all_schemes)r rS r" r" r# is_vcs s z Link.is_vcsc C s
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| j d k S)N)rH )r r" r" r# has_hash s z
Link.has_hashc C s] | d k s | j r d S| j d k s/ t | j d k sD t | j | j d | j S)zG
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