attribute_to_key_dict.py

# Example class
class Eg(object):
    a = None

    def __init__(self, a):
        self.a = a

# look up dict to connect attribute to keys so I can get the relavent attr based on the key.
# issue is that it is easy to make mistake in string since there's no auto-complete and IDE checking.
# and obviously it's annoying to use. I 
lookup_dict = {1: lambda eg: eg.a}

# Example usage implementation (not real!!!)
eg = Eg(10)
for k,v in lookup_dict.items():
    x = lookup_dict[k](eg)
    #....