![](/img/trans.png)
[英]How does the main function of the argparse template that ships with eclipse work in the interactive python shell?
[英]How does the “Module: CLI (argparse)” template in Pydev work?
Pydev(Eclipse)中的“模块:CLI(argparse)”模板如何工作? 当我运行它时,它只是打印出使用帮助并退出,并且我的代码没有执行。 从使用情况输出了解到,我需要传递一个“路径”参数。 但是在设置路径时,我得到了相同的结果。
该模板如下所示:
#!/usr/local/bin/python2.7
# encoding: utf-8
'''
test1.test -- shortdesc
test1.test is a description
It defines classes_and_methods
@author: user_name
@copyright: 2015 organization_name. All rights reserved.
@license: license
@contact: user_email
@deffield updated: Updated
'''
import sys
import os
from argparse import ArgumentParser
from argparse import RawDescriptionHelpFormatter
__all__ = []
__version__ = 0.1
__date__ = '2015-07-31'
__updated__ = '2015-07-31'
DEBUG = 1
TESTRUN = 0
PROFILE = 0
class CLIError(Exception):
'''Generic exception to raise and log different fatal errors.'''
def __init__(self, msg):
super(CLIError).__init__(type(self))
self.msg = "E: %s" % msg
def __str__(self):
return self.msg
def __unicode__(self):
return self.msg
def main(argv=None): # IGNORE:C0111
'''Command line options.'''
if argv is None:
argv = sys.argv
else:
sys.argv.extend(argv)
program_name = os.path.basename(sys.argv[0])
program_version = "v%s" % __version__
program_build_date = str(__updated__)
program_version_message = '%%(prog)s %s (%s)' % (program_version, program_build_date)
program_shortdesc = __import__('__main__').__doc__.split("\n")[1]
program_license = '''%s
Created by user_name on %s.
Copyright 2015 organization_name. All rights reserved.
Licensed under the Apache License 2.0
http://www.apache.org/licenses/LICENSE-2.0
Distributed on an "AS IS" basis without warranties
or conditions of any kind, either express or implied.
USAGE
''' % (program_shortdesc, str(__date__))
try:
# Setup argument parser
parser = ArgumentParser(description=program_license, formatter_class=RawDescriptionHelpFormatter)
parser.add_argument("-r", "--recursive", dest="recurse", action="store_true", help="recurse into subfolders [default: %(default)s]")
parser.add_argument("-v", "--verbose", dest="verbose", action="count", help="set verbosity level [default: %(default)s]")
parser.add_argument("-i", "--include", dest="include", help="only include paths matching this regex pattern. Note: exclude is given preference over include. [default: %(default)s]", metavar="RE" )
parser.add_argument("-e", "--exclude", dest="exclude", help="exclude paths matching this regex pattern. [default: %(default)s]", metavar="RE" )
parser.add_argument('-V', '--version', action='version', version=program_version_message)
parser.add_argument(dest="paths", help="paths to folder(s) with source file(s) [default: %(default)s]", metavar="path", nargs='+')
# Process arguments
args = parser.parse_args()
paths = args.paths
verbose = args.verbose
recurse = args.recurse
inpat = args.include
expat = args.exclude
if verbose > 0:
print("Verbose mode on")
if recurse:
print("Recursive mode on")
else:
print("Recursive mode off")
if inpat and expat and inpat == expat:
raise CLIError("include and exclude pattern are equal! Nothing will be processed.")
for inpath in paths:
### do something with inpath ###
print(inpath)
return 0
except KeyboardInterrupt:
### handle keyboard interrupt ###
return 0
except Exception, e:
if DEBUG or TESTRUN:
raise(e)
indent = len(program_name) * " "
sys.stderr.write(program_name + ": " + repr(e) + "\n")
sys.stderr.write(indent + " for help use --help")
return 2
if __name__ == "__main__":
if DEBUG:
sys.argv.append("-h")
sys.argv.append("-v")
sys.argv.append("-r")
if TESTRUN:
import doctest
doctest.testmod()
if PROFILE:
import cProfile
import pstats
profile_filename = 'test1.test_profile.txt'
cProfile.run('main()', profile_filename)
statsfile = open("profile_stats.txt", "wb")
p = pstats.Stats(profile_filename, stream=statsfile)
stats = p.strip_dirs().sort_stats('cumulative')
stats.print_stats()
statsfile.close()
sys.exit(0)
sys.exit(main())
您正在DEBUG模式下运行,并且在该模式下要做的就是将东西附加到argv
:
if DEBUG:
sys.argv.append("-h") # <-- that is your problem
sys.argv.append("-v")
sys.argv.append("-r")
由于要添加“未知”参数,因此在运行时:
args = parser.parse_args()
它引发一个异常。 您可以通过删除该行(最好)或使用以下方法来解决它:
parser.parse_known_args([])
(后者是隐藏潜在问题的补丁,应谨慎使用。IMO在这种情况下不应该使用!)。
在DEBUG
模式下, -h
添加到sys.argv
。 该命令优先于所有其他输入,并生成help
消息(并退出)。
注释掉添加-h
到DEBUG的行,以查看您的参数(加上v
和r
)的效果。
在其他模式下( main
定义的模式除外),命令行参数应该有效(即sys.argv
)。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.