64 lines
2.5 KiB
Python
64 lines
2.5 KiB
Python
"""CLI: Take a set of coins from a coin box."""
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from argparse import ArgumentParser
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from sys import exit, stderr
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from piggybank import print_program_version
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from piggybank.cli import EPILOGUE, complement_array_of_coins
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from piggybank.currencies import CURRENCIES, DEFAULT_CURRENCY, \
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BaseCurrencyError, print_supported_currencies
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from piggybank.piggybank import PiggyBank
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from piggybank.transaction import TYPE_OUTCOME
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__all__ = ["main"]
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def main():
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"""An entry point for a take command."""
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parser = ArgumentParser(prog="piggybank-take",
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description="Take a set of coins from a piggy bank.",
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epilog=EPILOGUE)
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parser.add_argument("file", type=str,
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help="a piggy bank file name. Missing .pb extension"
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"will be added")
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parser.add_argument("coins", type=int, nargs="+", metavar="COIN",
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help="add a set of coins. A new file will be created"
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"if it doesn't exist")
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parser.add_argument("-v", "--version", action="store_true",
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help="show program's version and license and exit")
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parser.add_argument("--list-currencies", action="store_true",
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help="list all supported currencies and exit")
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parser.add_argument("-r", "--reverse", action="store_true",
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help="reverse a set of coins so incomplete set"
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"fills with zeros from right. E.g. '8 9' will be"
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"interpreted as '8 9 0 0 0 0' instead of"
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"'0 0 0 0 8 9'")
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args = parser.parse_args()
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if args.version:
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print_program_version()
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exit()
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if args.list_currencies:
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print_supported_currencies()
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exit()
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try:
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piggybank = PiggyBank.from_file(args.file)
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coins = complement_array_of_coins(args.coins, piggybank.currency,
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args.reverse)
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piggybank.transact(coins, TYPE_OUTCOME)
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piggybank.save(args.file)
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except BaseCurrencyError as err:
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print(f"{type(err).__name__}:", err, file=stderr)
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except ValueError as err:
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print(f"{type(err).__name__}:", err, file=stderr)
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except FileNotFoundError as err:
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print(f"{type(err).__name__}:", f"{err} doesn't exist.", file=stderr)
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except Exception as err:
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print(f"Something went exceptionally wrong. Error:",
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f"{type(err).__name__}:", err, file=stderr)
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