ImportError: cannot import name 'Literal' from 'typing' (/usr/lib/python3.7/typing.py)

[ayezegel]

Running the following code, which used to work on Colab smoothly, began to trigger an error starting on 10/07/2021:

!pip install calcbench-api-client
import calcbench as cb

The error is as follows

ImportError                               Traceback (most recent call last)
<ipython-input-5-abd77c751d2a> in <module>()
      1 get_ipython().system('pip install calcbench-api-client')
----> 2 import calcbench as cb

1 frames
/usr/local/lib/python3.7/dist-packages/calcbench/dimensional.py in <module>()
      1 from dataclasses import dataclass
      2 from enum import Enum
----> 3 from typing import Callable, Dict, Literal, Sequence, Union
      4 
      5 import pandas as pd

ImportError: cannot import name 'Literal' from 'typing' (/usr/lib/python3.7/typing.py)

I would appreciate any advice on how to resolve this issue.
Note: I am using Google Chrome.

[craigcitro]

typing.Literal was introduced in python 3.8: https://docs.python.org/3/library/typing.html#typing.Literal

duplicate of #1880