Amazing-Python-Scripts

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# -*- coding: utf-8 -*-
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"""
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Created on Mon Jul  6 23:26:25 2020
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@author: Avinash Ranjan
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"""
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import re
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print("Magical Calculator")
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print("Type 'quit' to exit\n")
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previous = 0
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run = True
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def performMath():
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    global run
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    global previous
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    equation = ""
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    if previous == 0:
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        equation = input("Enter Equation:")
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    else:
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        equation = input(str(previous))
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    if equation == 'quit':
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        print("GoodBye, Human..!")
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        run = False
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    else:
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        equation = re.sub('[a-zA-Z,:()"{}"]', '', equation)
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        if previous == 0:
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            previous = eval(equation)
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        else:
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            previous = eval(str(equation) + equation)
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while run:
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    performMath()
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