CODEWITHSUNDEEP
pythoncommand-linecommand-line-argumentsargparse
Mainland
Mainland

Reputation: 4564

Python argparse compare input and default file names and types are same?

def check_file(user_name,default_name):
    while True:
        try:
            #### check user name matches the default name
            if ('%s'%(user_name)) == '%s'%(default_name):
                print("file matches")
                break
        except:
            print("wrong file.")
            continue
if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('-k1',type=argparse.FileType('r'),default='k1file.txt',required=True,
                        help='file input')

    parser.add_argument('-k2',type=argparse.FileType('r'),default='k2file.txt',required=True,
                        help='file input')    
    args = parser.parse_args()
    check_file(args.k1,args.get_default('k1'))
    check_file(args.k2,args.get_default('k2'))

Present output:

AttributeError: 'Namespace' object has no attribute 'k1'

Upvotes: 0

Views: 214

Answers (1)

rdas
rdas

Reputation: 21275

The add_argument method returns the Action that was just added. Which has details about the argument definition - including the default value.

import argparse

parser = argparse.ArgumentParser()

arg_action = parser.add_argument('-f', default='file')

print(arg_action.default)

Prints:

file

And you should be able to use that to compare the actual arguments with the default values.

Upvotes: 1

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