datetime-glob 1.0.0

datetime-glob

Parses date/times from a path given a glob pattern intertwined with date/time format akin to strptime/strftime format.

datetime.datetime.strptime suffices for simple date/time parsing. However, as soon as you need to handle wildcards, it becomes tricky and you need to resort to regular expressions.

We found the glob patterns and strptime format to be far easier to read and write than regular expressions, and encapsulated the logic involving regular expressions in this module.

Installation

• Create a virtual environment:

python3 -m venv venv3

• Activate it:

source venv3/bin/activate

• Install datetime-glob with pip:

pip3 install datetime-glob

Usage

To match a path:

>>> import datetime_glob
>>> matcher = datetime_glob.Matcher(pattern='/some/path/*%Y-%m-%dT%H-%M-%SZ.jpg')
>>> matcher.match(path='/some/path/some-text2016-07-03T21-22-23Z.jpg')
Match(year = 2016, month = 7, day = 3, hour = 21, minute = 22, second = 23, microsecond = None)

If you need to iterate over a tree, and want to match incrementally each path segment:

>>> import datetime_glob
>>> pattern_segments = datetime_glob.parse_pattern(pattern='/some/path/*%Y/%m/%d/%H-%M-%SZ.jpg')
>>> match = datetime_glob.Match()

>>> match=datetime_glob.match_segment(segment='some', pattern_segment=pattern_segments[0], match=match)
>>> match
Match(year = None, month = None, day = None, hour = None, minute = None, second = None, microsecond = None)

>>> match=datetime_glob.match_segment(segment='path', pattern_segment=pattern_segments[1], match=match)
>>> match
Match(year = None, month = None, day = None, hour = None, minute = None, second = None, microsecond = None)

>>> match=datetime_glob.match_segment(segment='some-text2016', pattern_segment=pattern_segments[2], match=match)
>>> match
Match(year = 2016, month = None, day = None, hour = None, minute = None, second = None, microsecond = None)

>>> match=datetime_glob.match_segment(segment='07', pattern_segment=pattern_segments[3], match=match)
>>> match
Match(year = 2016, month = 7, day = None, hour = None, minute = None, second = None, microsecond = None)

>>> match=datetime_glob.match_segment(segment='03', pattern_segment=pattern_segments[4], match=match)
>>> match
Match(year = 2016, month = 7, day = 3, hour = None, minute = None, second = None, microsecond = None)

>>> match=datetime_glob.match_segment(segment='21-22-23Z.jpg', pattern_segment=pattern_segments[5], match=match)
>>> match
Match(year = 2016, month = 7, day = 3, hour = 21, minute = 22, second = 23, microsecond = None)

Supported strftime directives

(subset from https://docs.python.org/3/library/datetime.html#strftime-and-strptime-behavior)

Development

• Check out the repository.

• In the repository root, create the virtual environment:

python3 -m venv venv3

• Activate the virtual environment:

source venv3/bin/activate

• Install the development dependencies:

pip3 install -e .[dev]

• Run precommit.py to execute pre-commit checks locally.