Can't solve Python argparse error 'object has no attribute'

Question

When I run this code I get

AttributeError: 'ArgumentParser' object has no attribute 'max_seed'

Here's the code

import argparse
import ConfigParser

CFG_FILE='/my.cfg'

# Get command line arguments
args = argparse.ArgumentParser()
args.add_argument('verb', choices=['new'])
args.add_argument('--max_seed', type=int, default=1000)
args.add_argument('--cmdline')
args.parse_args()

if args.max_seed:
    pass

if args.cmdline:
    pass

My source file is called "fuzz.py"

Answer 1

You should first initialize the parser and arguments and only then get the actual arguments from parse_args() (see example from the docs):

import argparse
import ConfigParser

CFG_FILE='/my.cfg'

# Get command line arguments
parser = argparse.ArgumentParser()
parser.add_argument('verb', choices=['new'])
parser.add_argument('--max_seed', type=int, default=1000)
parser.add_argument('--cmdline')

args = parser.parse_args()
if args.max_seed:
    pass

if args.cmdline:
    pass

Hope that helps.

Answer 2

If you use argparse parsed arguments inside another class (somewhere you do self.args = parser.parse_args() ), you might need to explicitly tell your lint parser to ignore Namespace type checking. As told by @frans at Avoid Pylint warning E1101: 'Instance of .. has no .. member' for class with dynamic attributes :

Just to provide the answer that works for me now - as [The Compiler][1] suggested you can add a rule for the problematic class in your projects .pylintrc:

[TYPECHECK]
ignored-classes=Namespace

[1]: https://stackoverflow.com/users/2085149/the-compiler