'How to write a python computer program that will take any valid arithmetic expression as a string and will output a list(or array of string)? [duplicate]
How to write a python computer program that will take any valid arithmetic expression as a string and will output a list (or array of string) of individual objects of the expression such as numbers, operators, variables, and parenthesis?
Example#1:
Input:
x + 2
Output:
["x", "+", "2"]
Example#2:
Input:
2 * count + 17
Output:
["2", "*", "count", "+", "17"]
Example#3:
Input:
(12+x1)*(y2-15)
Output:
["(", "12", "+", "x1", ")", "*", "(", "y2", "-", "15", ")"]
Solution 1:[1]
You can use regular expression:
import re
input_str = "(12+x1)*(y2-15)"
output = list(filter(lambda x: x.strip() not in [''], re.split('([^a-zA-Z0-9])', input_str)))
print(output)
Output:
['(', '12', '+', 'x1', ')', '*', '(', 'y2', '-', '15', ')']
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Dharman |