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bpo-44431: Added command line functionality to UUID module. by ephenix · Pull Request #26751 · python/cpython · GitHub
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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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54 changes: 54 additions & 0 deletions Lib/uuid.py
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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 @@ -727,3 +741,43 @@ def uuid5(namespace, name):
NAMESPACE_URL = UUID('6ba7b811-9dad-11d1-80b4-00c04fd430c8')
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

nanjekyejoannah Jun 17, 2021

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality Hide comment

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
"""

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}]. 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']:
if len(sys.argv) != 4:
raise Exception(f"Incorrect number of arguments. Example usage: \n python -m uuid {cmd} NAMESPACE NAME")
else:
namespace = sys.argv[2]
name = sys.argv[3]
if namespace == "NAMESPACE_DNS":
namespace = NAMESPACE_DNS
elif namespace == "NAMESPACE_URL":
namespace = NAMESPACE_URL
elif namespace == "NAMESPACE_OID":
namespace = NAMESPACE_OID
elif namespace == "NAMESPACE_X500":
namespace = NAMESPACE_X500
else:
namespace = UUID(namespace)
if cmd == "uuid3":
print(uuid3(namespace, name))
else:
print(uuid5(namespace, name))
if cmd == 'uuid4':
print(uuid4())
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2021-06-16-23-57-45.bpo-44431.nA8C9m.rst
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@@ -0,0 +1 @@
UUID module now supports being called from command line. ex > python -m uuid

nanjekyejoannah Jun 17, 2021

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality Hide comment

I don't think we need an example in a news entry. I would do way with ex > python -m uuid .
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