Question :
Say that python package A requires B, C and D;
is there a way to list A → B C D without loading them ?
Requires in the metadata (yolk -M A) are often incomplete, grr.
One can download A.tar / A.egg, then look through A/setup.py,
but some of those are pretty gory.
(I’d have thought that getting at least first-level dependencies could be mechanized;
even a 98 % solution would be better than avalanching downloads.)
A related question:
pip-upgrade-package-without-upgrading-dependencies
Answer #1:
sfood -fuq package.py | sfood-target-files
will list the dependencies.
`-f` tells sfood to follow dependencies recursively
`-u` tells sfood to ignore unused imports
`-q` tells sfood to be quiet about debugging information
To filter out modules from the standard library, you could use
sfood -fuq package.py | sfood-filter-stdlib | sfood-target-files
As you’ve already noted, if there are other directories you’d like ignored, you can also use the sfood -I flag.
Answer #2:
modulefinder from the standard lib
New in version 2.3.
This module provides a ModuleFinder
class that can be used to determine
the set of modules imported by a
script. modulefinder.py can also be
run as a script, giving the filename
of a Python script as its argument,
after which a report of the imported
modules will be printed.
I am not sure if it complies with your requierement about not loading the modules. From here:
modulefinder use bytecode inspection
to find dependencies, and therefore is
free from any side-effects that may be
caused by importing the modules being
studied.
Other hints about the use of pylint or Gui2exe here
Answer #3:
If by package you mean a pip installed package (and not a directory with an __init__.py), then you can use the Python package called pip. For example:
def get_all_package_dependencies():
"""Return dictionary of installed packages to list of package dependencies."""
return {
dist.key: [r.key for r in dist.requires()]
for dist in pip.get_installed_distributions()
}
