Polish notation python

#! /usr/bin/env python
from collections import deque
def parse(tokens):
    token=tokens.popleft()
    if token=='+':
            return parse(tokens)+parse(tokens)
    elif token=='-':
            return parse(tokens)-parse(tokens)
    elif token=='*':
            return parse(tokens)*parse(tokens)
    elif token=='/':
            return parse(tokens)/parse(tokens)
    else:
            # must be just a number
            return int(token)


if __name__=='__main__':
        expression="+ 2 2"
        print parse(deque(expression.split()))

Source: stackoverflow.com

Similar codes

-1 vote118 views2 answers
Install unity on pop os
Python
4 votes130 views3 answers
Pandas df by row index
Python
9 votes117 views2 answers
Install python linux ubuntu
Python
0 vote114 views1 answer
Pandas read to a csv file
Python
38 votes110 views4 answers
Python color text console
Python
0 vote120 views1 answer
Pytorch reduce dataset dataloader
Python
7 votes122 views4 answers
Python tkinter button multiple commands
Python
0 vote122 views1 answer
Comment all selected lines in python
Python
0 vote137 views1 answer
How to loop through pages of pdf using python
Python
21 votes129 views5 answers
Decode base64 python
Python