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Darwin/lib/python3.4/site-packages/pip/commands/show.py

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+import os
+
+from pip.basecommand import Command
+from pip.log import logger
+from pip._vendor import pkg_resources
+
+
+class ShowCommand(Command):
+    """Show information about one or more installed packages."""
+    name = 'show'
+    usage = """
+      %prog [options] <package> ..."""
+    summary = 'Show information about installed packages.'
+
+    def __init__(self, *args, **kw):
+        super(ShowCommand, self).__init__(*args, **kw)
+        self.cmd_opts.add_option(
+            '-f', '--files',
+            dest='files',
+            action='store_true',
+            default=False,
+            help='Show the full list of installed files for each package.')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        if not args:
+            logger.warn('ERROR: Please provide a package name or names.')
+            return
+        query = args
+
+        results = search_packages_info(query)
+        print_results(results, options.files)
+
+
+def search_packages_info(query):
+    """
+    Gather details from installed distributions. Print distribution name,
+    version, location, and installed files. Installed files requires a
+    pip generated 'installed-files.txt' in the distributions '.egg-info'
+    directory.
+    """
+    installed_packages = dict(
+        [(p.project_name.lower(), p) for p in pkg_resources.working_set])
+    for name in query:
+        normalized_name = name.lower()
+        if normalized_name in installed_packages:
+            dist = installed_packages[normalized_name]
+            package = {
+                'name': dist.project_name,
+                'version': dist.version,
+                'location': dist.location,
+                'requires': [dep.project_name for dep in dist.requires()],
+            }
+            filelist = os.path.join(
+                       dist.location,
+                       dist.egg_name() + '.egg-info',
+                       'installed-files.txt')
+            if os.path.isfile(filelist):
+                package['files'] = filelist
+            yield package
+
+
+def print_results(distributions, list_all_files):
+    """
+    Print the informations from installed distributions found.
+    """
+    for dist in distributions:
+        logger.notify("---")
+        logger.notify("Name: %s" % dist['name'])
+        logger.notify("Version: %s" % dist['version'])
+        logger.notify("Location: %s" % dist['location'])
+        logger.notify("Requires: %s" % ', '.join(dist['requires']))
+        if list_all_files:
+            logger.notify("Files:")
+            if 'files' in dist:
+                for line in open(dist['files']):
+                    logger.notify("  %s" % line.strip())
+            else:
+                logger.notify("Cannot locate installed-files.txt")