Workaround to preserve original PyYAML module behavior

[ntoofu]

Background

Workaround for issue #34.

Changes

• Specify pyraml_yaml as module name for PyYAML module by using imp module

Notes

• imp.load_module is deprecated, but equivalent implementation without deprecated functions will lose backward compatibility and will be difficult to fall back to deprecated implementation.
  • The equivalent implementation is like below.
    • In pyraml/__init__.py

      import importlib.util
      
      pyyaml_mod_spec = importlib.util.find_spec('yaml')
      pyyaml_module = importlib.util.module_from_spec(pyyaml_mod_spec)
      pyyaml_mod_spec.loader.exec_module(pyyaml_module)
      sys.modules['pyraml_yaml'] = pyyaml_module 
      yaml = pyyaml_module
      
      # yaml.add_representer(...)
      

    • In the other python scripts in pyraml directory

      import pyraml_yaml as yaml
      
      # yaml.load(...)