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calc.py
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calc.py
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stack = []
def push(val):
stack.append(val)
def pop():
return stack.pop()
def main():
print(">> Insert commands")
while True:
temp = input(">> ")
if temp == "q":
break
elif temp == "+":
if len(stack) < 2:
print(">> Not enough values")
continue
push(pop() + pop())
elif temp == "*":
if len(stack) < 2:
print(">> Not enough values")
continue
push(pop() * pop())
elif temp == "-":
if len(stack) < 2:
print(">> Not enough values")
continue
push(pop() - pop())
else:
push(int(temp))
print(stack)
if __name__ == '__main__':
main()