[Python-ideas] Syntax to import modules before running command from the command line

Wes Turner wes.turner at gmail.com
Fri Jan 5 02:33:12 EST 2018

An implicit print() would be convenient, too.

On Friday, January 5, 2018, Wes Turner <wes.turner at gmail.com> wrote:

> Could it just check if -c and -m are both set?
> That way there'd be no need for -p or -M.
> (I have an -m <module> switch in pyline which does exactly this. It makes
> copying and pasting less convenient; but does save having to type 'import
> module;’ for one liners)
> On Friday, January 5, 2018, Steve Barnes <gadgetsteve at live.co.uk> wrote:
>> Currently invoking `python -c "some;separated;set of commands;"` will,
>> if you need to use any library functions, require one or more import
>> somelib; sections in the execution string. This results in rather
>> complex "one liners".
>> On the other hand `python -m somelib` will load somelib and attempt to
>> execute its `__main__()` or give an error if there isn't one.
>> What I would like to suggest is a mechanism to pre-load libraries before
>> evaluating the -c option as this would allow the use of code from
>> libraries that don't have a `__main__` function, or those that do but it
>> doesn't do what you want.
>> Since -m for module is already taken I would suggest one of:
>>     -p for pre-load module
>>     -M for load module without attempting to execute `module.__main__()`
>> and without defining "__main__" in the load context or
>>     -l for library
>> with the last two having the advantage of appearing next to -m in the
>> --help output.
>> This would change, (for a trivial example):
>>     `python -c"import numpy;print(numpy.pi);"`
>> to:
>>     `python -M numpy -c"print(numpy.pi);"`
>> --
>> Steve (Gadget) Barnes
>> Any opinions in this message are my personal opinions and do not reflect
>> those of my employer.
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