argparse

Let's say I have a script that does some work on a file. It takes this file's name on the command line, but if it's not provided, it defaults to a known filename ( content.txt , say). With python's argparse , I use the following: parser = argparse.ArgumentParser(description='my illustrative example') parser.add_argument('--content', metavar='file', default='content.txt', type=argparse.FileType('r'), help='file to process (defaults to content.txt)') args = parser.parse_args() # do some work on args.content, which is a file-like object This works great. The only problem is that if I run python

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Recently, I am learning argparse module, Argument error occurred below the code import argparse import sys class ExecuteShell(object): def create(self, args): """aaaaaaa""" print('aaaaaaa') return args def list(self, args): """ccccccc""" print('ccccccc') return args def delete(self, args): """ddddddd""" print('ddddddd') return args class TestShell(object): def get_base_parser(self): parser = argparse.ArgumentParser() parser.add_argument('-h', '--help', action='store_true', help=argparse.SUPPRESS) parser.add_argument('-c', action='store',

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm using argparse to take input and pass it to a function that takes as arguments two variables and **kwargs . Here's my function: import requests import sys import argparse def location_by_coordinate(LAT, LNG, **kwargs): if not kwargs: coordinate_url = "https://api.instagram.com/v1/locations/search?lat=%s&lng=%s&access_token=%s" % (LAT, LNG, current_token) r = requests.get(coordinate_url).text else: coordinate_url = "https://api.instagram.com/v1/locations/search?lat=%s&lng=%s&access_token=%s" % (LAT, LNG, current_token) for key, value in

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I don't think this is possible, but I want to handle exceptions from argparse myself. For example: import argparse parser = argparse.ArgumentParser() parser.add_argument('--foo', help='foo help', required=True) try: args = parser.parse_args() except: do_something() When I run it: $ myapp.py usage: myapp --foo foo myapp: error: argument --foo is required But I want it to fall into the exception instead. 回答1: You can subclass ArgumentParser and override the error method to do something different when an error occurs: class ArgumentParserError

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: In my python script, I want to be able to use an optional input parameter only when another optional parameter has been specified. Example: $ python myScript . py -- parameter1 value1 $ python myScript . py -- parameter1 value1 -- parameter2 value2 But NOT: $ python myScript . py -- parameter2 value2 How do I do this with argparse? Thanks! 回答1: Use a custom action: import argparse foo_default = None class BarAction ( argparse . Action ): def __call__ ( self , parser , namespace , values , option_string = None ): didfoo = getattr (

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to learn how to analyze social media data available on the web and I'm starting with Youtube. from apiclient.errors import HttpError from outh2client.tools import argparser from apiclient.discovery import build import pandas as pd DEVELOPER_KEY = "AIzaSyB_F1mCrDydEbGUosnZES-NW-mg1CaOyjI" YOUTUBE_API_SERVICE_NAME = "youtube" YOUTUBE_API_VERSION = "v3" argparser.add_argument("--q", help="Search term", default="apple product") argparser.add_argument("--max-results", help="Max results", default=50) args = argparser.parse_args()

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: What I need is: pro [-a xxx | [-b yyy -c zzz]] I tried this but does not work. Could someone help me out? group= parser.add_argument_group('Model 2') group_ex = group.add_mutually_exclusive_group() group_ex.add_argument("-a", type=str, action = "store", default = "", help="test") group_ex_2 = group_ex.add_argument_group("option 2") group_ex_2.add_argument("-b", type=str, action = "store", default = "", help="test") group_ex_2.add_argument("-c", type=str, action = "store", default = "", help="test") Thanks! 回答1: add_mutually_exclusive_group

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: In a file (say parser.py ) I have: import argparse def parse_cmdline(cmdline=None): parser = argparse.ArgumentParser() parser.add_argument('--first-param',help="Does foo.") parser.add_argument('--second-param',help="Does bar.") if cmdline is not None: args = parser.parse_args(cmdline) else: args = parser.parse_args() return vars(args) if __name__=='__main__': print parse_cmdline() Sure enough, when called from the command line it works and give me pretty much what I expect: $ ./parser.py --first-param 123 --second-param 456 {'first_param':