ipython-autocomplete.py

# References:
# https://ipython.readthedocs.io/en/stable/config/integrating.html
# https://stackoverflow.com/questions/17974777/tab-complete-dictionary-keys-in-ipython

class Shape2():
    area = 1
    perimeter = 1
    location = 1

    def __getitem__(self, key):
        return getattr(self, key)
    
    def _ipython_key_completions_(self):
        return ["area", "perimeter", "location"]
      
      
s = Shape2()

# in ipython/jupyter type
# s["lo<TAB>
# to autocomplete
s["location"]