title: I dont know how to deal with this python error TypeError: 'tuple' object is not callable
body: <p>I have searched other threads and questions with the similar problem and from what i see the problem arises when your variables have the same identifier as a built in function, but i have tried or sorts of name for my identifiers it still didn't work...   I am very new to python so i may not be familiar with complicated terminology used i python</p>
  
  <pre><code>grades = [('A', 90), ('B', 70), ('C', 50), ('D', 30), ('F', 0)]
  while True:
      score = int(input('Enter grade: '))
      for counter in grades:
          if score &gt;= counter(2):
              fingrade = (counter(1))
              break
      print('This student got an ' + fingrade)
  </code></pre>
  
  <p>this is the error</p>
  
  <pre><code>if score &gt;= counter(2):
  TypeError: 'tuple' object is not callable
  </code></pre>