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from pip.basecommand import Command, SUCCESS
from pip.exceptions import CommandError
class HelpCommand(Command):
"""Show help for commands"""
name = 'help'
usage = """
%prog <command>"""
summary = 'Show help for commands.'
def run(self, options, args):
from pip.commands import commands, 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:
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[cmd_name]()
command.parser.print_help()
return SUCCESS