smart calc

main.py

### special for iVan

def reformat(line):
  expression = []
  element = '&'
  line.replace(' ', '')
  for item in line:
    if item in '0123456789':
      if element == '&':
        element = int(item)
      else:
        element = element * 10 + int(item)
    else:
      expression.append(element)
      expression.append(item)
      element = '&'
  expression.append(element)
  for i in range(0,len(expression)):
    if expression[i] == '-':
      expression[i] = '+'
      expression[i+1] *= -1
  while '&' in expression:
    expression.remove('&')
  return(expression)


def find_brace(expression):
  result = {'place': 0,
            'lenght': 0,
            'value': []}
  current_place = 0
  for item in expression:
    result['value'].append(item)
    if item == '(':
      result['value'].clear()
      result['place'] = current_place
    elif item == ')':
      result['value'].remove(')')
      result['lenght'] = current_place - result['place'] - 1
      return result
    current_place += 1


def multiply(expression):
  for i in range(0, len(expression)):
    if expression[i] == '*':
      expression[i+1] = expression[i-1] * expression[i+1]
      expression[i-1] = expression[i] = '&'
    if expression[i] == '/':
      expression[i+1] = expression[i-1] / expression[i+1]
      expression[i-1] = expression[i] = '&'
  while '&' in expression:
    expression.remove('&')
  return expression




def add(expression):
  for i in range(0, len(expression)):
    if expression[i] == '+':
      expression[i+1] = expression[i-1] + expression[i+1]
      expression[i-1] = expression[i] = '&'
  while '&' in expression:
    expression.remove('&')
  return expression


def brace_expancion(expression):
  while '(' in expression:
    brace = find_brace(expression)
    brace['value'] = multiply(brace['value'])
    brace['value'] = add(brace['value'])
    expression = expression[:brace['place']] + brace['value'] + expression[brace['place']+brace['lenght'] + 2:]
  return expression
    

print(add(multiply(brace_expancion(reformat(input()))))[0])