Evaluate a Basic Arithmetic Expression

MediumPython

Problem

Basic calculator: evaluate an expression with + - * /.

Asked in the VO coding stage. From SWE question bank. Reported follow-up: Add support for parentheses.

Contract

Implement def calculate(expression):. The input is a valid string containing non-negative integers, spaces, and the operators +, -, *, and /. Return the integer result. Apply standard precedence, and truncate division toward zero. Parentheses are not included.

Constraints

1 <= len(expression) <= 1000
The expression contains at least one integer
The expression contains only digits, spaces, and +, -, *, /
The expression is valid
Division by zero does not occur

Function Signature

def calculate(expression):

CodePython 3

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