paul j3 <[email protected]> added the comment:
The pathlib.Path is new since I paid much attention to os matters (I cut my
teeth on py2.5).
Off hand it looks like the user could
import pathlib
parser.add_argument('-p', type=pathlib.Path)
to convert a string into a Path object.
A custom type function could call this, and apply any desired methods before
returning the Path object. But that should be up to the user, not the
`argparse` developers.
Importing path specific modules such as pathlib (which in turn has a lot of
imports) goes against the attempt to reduce the number of unnecessary imports
with modules like argparse.
https://bugs.python.org/issue30152
Reduce the number of imports for argparse
After this diet argparse still imports os, and uses:
os.path.basename
I might also note that argparse has only one custom 'type' function, the
FileType factory. Other common type functions like 'int' and 'float' are
Python builtin's. Adding a custom 'bool' (to be used instead of the builtin
'bool') has been rejected.
https://bugs.python.org/issue37564
json, yaml, and datetime types have also been rejected
https://bugs.python.org/issue35005
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