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bpo-44431: Added command line functionality to UUID module. #26751

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bpo-44431: Added command line functionality to UUID module. #26751

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c8432c3
Added command line functionality to UUID module.
Jun 16, 2021
fe7fea1
Added whitespace and blurb entry.
ephenixaws Jun 17, 2021
d00cf6b
implemented -h --help which prints module doc string. Added command-l…
ephenixaws Jun 17, 2021
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implemented -h --help which prints module doc string. Added command-l… 
…ine usage to doc string.
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@ephenixaws
ephenixaws committed Jun 17, 2021
commit d00cf6bb757717416661a8b4c90d6dc6cdf02d0c
32 changes: 18 additions & 14 deletions Lib/uuid.py
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,20 @@
# make a UUID from a 16-byte string
>>> uuid.UUID(bytes=x.bytes)
UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')

Command-Line usage:

python -m uuid [-h] | COMMAND [NAMESPACE] [NAME]

# generate a random uuid
>>> python -m uuid

# generate a uuid1
>>> python -m uuid uuid1

# generate a uuid3 or uuid5
>>> python -m uuid uuid5 NAMESPACE_DNS python.org

"""

import os
Expand Down Expand Up @@ -728,31 +742,21 @@ def uuid5(namespace, name):
NAMESPACE_OID = UUID('6ba7b812-9dad-11d1-80b4-00c04fd430c8')
NAMESPACE_X500 = UUID('6ba7b814-9dad-11d1-80b4-00c04fd430c8')


if __name__ == '__main__':
"""
Enables uuid to be called from the command line
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I wonder if we can move this logic into a helper method so that we just call the method here? Most libraries seem to follow this e.g Lib/timeit.py


Example usage:

python -m uuid
> 16fd2706-8baf-433b-82eb-8c7fada847da

python -m uuid uuid5 NAMESPACE_DNS python.org
> 886313e1-3b8a-5372-9b90-0c9aee199e5d

python -m uuid uuid5 {custom_uuid} mydomain.com
> e332bfe2-fed1-4e9c-ad45-db54e087b39e
"""

allowed_cmds = ['uuid1', 'uuid3', 'uuid4', 'uuid5']
allowed_cmds = ['-h','--help','uuid1', 'uuid3', 'uuid4', 'uuid5']
if len(sys.argv) == 1:
# By default, print a random uuid.
print(uuid4())
else:
cmd = sys.argv[1]
if cmd not in allowed_cmds:
raise Exception(f"Command not found: {cmd}. Allowed values are {allowed_cmds}")
raise Exception(f"Command not found: [{cmd}]. Run `python -m uuid -h` for more information.")
if cmd in ['-h', '--help']:
print(__doc__)
if cmd == 'uuid1':
print(uuid1())
if cmd in ['uuid3', 'uuid5']:
Expand Down