Method create_from_args

tests/comparison/funcs.py:145–160

Constructor for instantiating from values. The return types of the exprs will be inspected and used to find the function signature. If no signature can be found an error will be raised.

(cls, *val_exprs)

  @classmethod
  def create_from_args(cls, *val_exprs):
    '''Constructor for instantiating from values. The return types of the exprs will be
       inspected and used to find the function signature. If no signature can be found
       an error will be raised.
    '''
    for signature in cls.signatures():
      if len(signature.args) != len(val_exprs):
        continue
      for idx, arg in enumerate(val_exprs):
        if not issubclass(arg.type, signature.args[idx].type):
          break
      else:
        break
    else:
      raise Exception('No signature matches the given arguments: %s' % (val_exprs, ))
    return cls(signature, *val_exprs)

  def __init__(self, signature, *val_exprs):
    '''"signature" should be one of the available signatures at the class level and