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56 lines
1.2 KiB
Python
56 lines
1.2 KiB
Python
#!/usr/bin/env python3
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"""Custom input type parser."""
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from argparse import ArgumentTypeError
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import dateparser
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import environs
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env = environs.Env()
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def timedelta_validator(value):
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"""Return the dateparser string for a time in the past.
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:param value: a string containing a time format supported by
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mod:`dateparser`
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"""
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if value is None:
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return None
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if not dateparser.parse(value):
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raise ArgumentTypeError("'{}' is not a valid timedelta string".format(value))
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return value
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def timedelta(value, dt_format=None):
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"""Return the :class:`datetime.datetime.DateTime` for a time in the past.
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:param value: a string containing a time format supported by
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mod:`dateparser`
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"""
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if value is None:
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return None
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timedelta = dateparser.parse(
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value, settings={
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"TO_TIMEZONE": "UTC",
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"RETURN_AS_TIMEZONE_AWARE": True
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}
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)
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if dt_format:
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timedelta = timedelta.strftime(dt_format)
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return timedelta
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@env.parser_for("timedelta_validator")
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def timedelta_parser(value):
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try:
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timedelta_validator(value)
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return value
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except ArgumentTypeError as e:
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raise environs.EnvError(e)
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