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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Command usage:
# expressions.py expression
# Example:
# python expressions.py "3x^6(x^6/25.9)"
def convert(expression):
#Multiplication
expression = expression.replace('0x', '0*x')
expression = expression.replace('1x', '1*x')
expression = expression.replace('2x', '2*x')
expression = expression.replace('3x', '3*x')
expression = expression.replace('4x', '4*x')
expression = expression.replace('5x', '5*x')
expression = expression.replace('6x', '6*x')
expression = expression.replace('7x', '7*x')
expression = expression.replace('8x', '8*x')
expression = expression.replace('9x', '9*x')
expression = expression.replace(')(', ')*(')
expression = expression.replace(')x', ')*x')
expression = expression.replace(')0', ')*0')
expression = expression.replace(')1', ')*1')
expression = expression.replace(')2', ')*2')
expression = expression.replace(')3', ')*3')
expression = expression.replace(')4', ')*4')
expression = expression.replace(')5', ')*5')
expression = expression.replace(')6', ')*6')
expression = expression.replace(')7', ')*7')
expression = expression.replace(')8', ')*8')
expression = expression.replace(')9', ')*9')
expression = expression.replace('0(', '0*(')
expression = expression.replace('1(', '1*(')
expression = expression.replace('2(', '2*(')
expression = expression.replace('3(', '3*(')
expression = expression.replace('4(', '4*(')
expression = expression.replace('5(', '5*(')
expression = expression.replace('6(', '6*(')
expression = expression.replace('7(', '7*(')
expression = expression.replace('8(', '8*(')
expression = expression.replace('9(', '9*(')
expression = expression.replace('x(', 'x*(')
#Power again
expression = expression.replace('^', '**')
numbers = [str(i) for i in range(10)]
converted_list = []
has_point = False
on_number = False
for i in expression:
if not i in numbers:
if on_number:
if i == '.':
has_point = True
else:
if not has_point:
converted_list.append('.0')
on_number = False
has_point = False
else:
on_number = True
converted_list.append(i)
if on_number and not has_point:
converted_list.append('.0')
return ''.join(converted_list)
if __name__ == "__main__":
import sys
print convert(sys.argv[1])
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