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편집 파일: package_index.cpython-38.pyc
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If it is the URL of a .py file with an unambiguous ``#egg=name-version`` tag (i.e., one that escapes ``-`` as ``_`` throughout), a trivial ``setup.py`` is automatically created alongside the downloaded file. If `spec` is a ``Requirement`` object or a string containing a project/version requirement spec, this method returns the location of a matching distribution (possibly after downloading it to `tmpdir`). If `spec` is a locally existing file or directory name, it is simply returned unchanged. If `spec` is a URL, it is downloaded to a subpath of `tmpdir`, and the local filename is returned. Various errors may be raised if a problem occurs during downloading. r6 r� rK N)r� r r� � _download_urlrF rA r, � gen_setuprR r> r� r( r� �fetch_distribution)r r% �tmpdirr< �foundr/ r@ r& r& r' r3 - s zPackageIndex.downloadc s� �� d|� i �d}d � ����fdd� }|rH��� ��|� ||�}|s^|dk r^|||�}|dkr��jdk rx��� ||�}|dkr�|s���|� ||�}|dkr���d�r�dp�d|� n�� d|� |j|jd �S dS ) a| Obtain a distribution suitable for fulfilling `requirement` `requirement` must be a ``pkg_resources.Requirement`` instance. If necessary, or if the `force_scan` flag is set, the requirement is searched for in the (online) package index as well as the locally installed packages. If a distribution matching `requirement` is found, the returned distribution's ``location`` is the value you would have gotten from calling the ``download()`` method with the matching distribution's URL or filename. If no matching distribution is found, ``None`` is returned. 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