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projecten1/lib/python3.6/site-packages/pip/_internal/commands/help.py

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+from __future__ import absolute_import
+
+from pip._internal.basecommand import SUCCESS, Command
+from pip._internal.exceptions import CommandError
+
+
+class HelpCommand(Command):
+    """Show help for commands"""
+    name = 'help'
+    usage = """
+      %prog <command>"""
+    summary = 'Show help for commands.'
+    ignore_require_venv = True
+
+    def run(self, options, args):
+        from pip._internal.commands import commands_dict, get_similar_commands
+
+        try:
+            # 'pip help' with no args is handled by pip.__init__.parseopt()
+            cmd_name = args[0]  # the command we need help for
+        except IndexError:
+            return SUCCESS
+
+        if cmd_name not in commands_dict:
+            guess = get_similar_commands(cmd_name)
+
+            msg = ['unknown command "%s"' % cmd_name]
+            if guess:
+                msg.append('maybe you meant "%s"' % guess)
+
+            raise CommandError(' - '.join(msg))
+
+        command = commands_dict[cmd_name]()
+        command.parser.print_help()
+
+        return SUCCESS