Parenthesis parser

paranthesis_parser.py

def parse(string):
  tokens = []
  for char in string:
    try:
        if char == '(':
          tokens.append('(')
        elif char == '[':
          tokens.append('[')
        elif char == ']':
          if tokens.pop() != '[':
              return False
        elif char == ')':
            if tokens.pop() != '(':
                return False
    except IndexError:
        return False
  return not len(tokens)

assert(parse('()'))
assert(parse('()()'))
assert(parse('(())'))
assert(not parse('((())'))
assert(not parse('((]))'))
assert(parse('(([]))'))
assert(not parse('(([))]'))