Code Completion 4 Challenges

Complete the argparse code

Practice typed arguments, option defaults, boolean flags, and subcommands.

Intermediate ~9 min read

Register a required positional count argument that is converted to an integer.

python Your answer

import argparse
parser = argparse.ArgumentParser()
args = parser.parse_args(["7"])
print(args.count * 2)

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Add an integer option --limit that defaults to 10 when it is not supplied.

python Your answer

import argparse
parser = argparse.ArgumentParser()
args = parser.parse_args([])
print(args.limit)

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Define a --dry-run flag that is False by default and True when present.

python Your answer

import argparse
parser = argparse.ArgumentParser()
args = parser.parse_args(["--dry-run"])
print(args.dry_run)

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Create a required copy subcommand with source and destination positional arguments.

python Your answer

import argparse
parser = argparse.ArgumentParser()
commands = parser.add_subparsers(dest="command", required=True)
args = parser.parse_args(["copy", "a.txt", "b.txt"])
print(args.command, args.source, args.destination)

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