On 1/27/2023 4:53 PM, Ivan "Rambius" Ivanov wrote:
Hello Cameron,
On Fri, Jan 27, 2023 at 4:45 PM Cameron Simpson <c...@cskk.id.au> wrote:
On 27Jan2023 15:31, Ivan "Rambius" Ivanov <rambiusparkisan...@gmail.com> wrote:
I am developing a script that accepts a time zone as an option. The
time zone can be any from pytz.all_timezones. I have
def main():
parser = argparse.ArgumentParser()
parser.add_argument("-z", "--zone", choices=pytz.all_timezones)
[...]
It works, but when I run it with the -h option it dumps all entries in
pytz.all_timezones.
What happens if you just presupply a `help=` parameter in
`add_argument`?
I tried with def main():
parser = argparse.ArgumentParser()
parser.add_argument("-z", "--zone", choices=pytz.all_timezones,
help="a timezone from pytz.all_timezones")
args = parser.parse_args()
print(args)
-h still shows all the contents of pytz.all_timezones.
Adding a few arguments makes it work (with the help of the argparse doc
page and Stack Overflow:
https://stackoverflow.com/questions/14950964/overriding-default-argparse-h-behaviour):
import argparse
import pytz
HELP ="""\nThis is the help message.
This is the second line of the help message."""
def main():
parser = argparse.ArgumentParser(add_help=False, usage = HELP)
parser.add_argument("-z", "--zone", choices=pytz.all_timezones,
help = argparse.SUPPRESS)
parser.add_argument('-h', '--h', action = 'help',
help = argparse.SUPPRESS)
args = parser.parse_args()
print(args)
print(f"Specified timezone: {args.zone}")
main()
Your help message will display after "usage", like this -
usage:
This is the help message.
This is the second line of the help message.
You would give up have argparse automatically list all the options, but
you can add add them manually to the HELP string.
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