Is there any way to unimport a library

[alex23]

On Nov 21, 1:15 am, Gelonida N <gelon... at gmail.com> wrote:
> I wondered whether there is any way to un-import a library, such, that
> it's occupied  memory and the related shared libraries are released.
>
> My usecase is following:
>
> success = False
> try:
>     import lib1_version1 as lib1
>     import lib2_version1 as lib2
>     success = True
> except ImportError:
>     pass
> if not success:
>     try:
>         import lib1_version2 as lib1
>         import lib2_version2 as lib2
>         success = True
>     except importError:
>         pass
> if not success:
>     . . .
>
> Basically if I am not amble to import lib1_version1 AND lib2_version1,
> then I wanted to make sure, that lib1_version1 does not waste any memory

A simple way would be to create packages for each version that import
the two dependencies:

  /version1/__init__.py:
    import lib1_version1 as lib1
    import lib2_version2 as lib2

  /version2/__init__.py:
    import lib1_version2 as lib1
    import lib2_version2 as lib2

Then create a single module to handle the importing:

  /libraries.py:

  __all__ = ['lib1', 'lib2', 'version']

  version = None
  _import_errs = []

  try:
    from version1 import lib1, lib2
    version = 1
  except ImportError as (err,):
    _import_errs.append(err)

  if version is None:
    try:
      from version2 import lib1, lib2
      version = 2
    except ImportError as (err,):
      _import_errs.append(err)

  if version is None:
    _format_errs = (('v%d: %s' % (ver, err)) for ver, err in
enumerate(_import_errs, 1))
    raise ImportError('Unable to import libraries: %s' %
list(_format_errs))