Fallback Enum class and boolean index fix

[pavanky]

• Fixes Cannot index with booleans #34

[FilipeMaia]

The name Enum_value does not match the other functions. Its use also looks a bit clunky...

[pavanky]

@FilipeMaia Enum_value is a place holder for now. It is easy to grep and replace for any future changes.

[FilipeMaia]

Instead of having an Enum_value causing changes all over the code what about changing the way the enums are defined, e.g.:

try:
    from enum import Enum    
    def EnumType(v):
        return v
except:
    class Enum(object):
        pass
    class EnumType(object):
        def __init__(self, v):
            self.value = v

class Dtype(Enum):
    """
    Error values. For internal use only.
    """
    f32 = EnumType(0)
    ...

That way all the changes would be in the same place.

[pavanky]

@FilipeMaia That would work.

[pavanky]

Fixed the Enum class, looking into the Index class issue.

[pavanky]

Welp, its broken. Fixing hit.

[pavanky]

Accidentally pushed to upstream :( I will fix the index issue in upstream shortly.

[FilipeMaia]

Ok