title: TypeError: 'str' object is not callable - Python
body: <p>I keep getting this error. TypeError: 'str' object is not callable</p>
  
  <p>I searched all my code and I don't even use the word str anywhere.</p>
  
  <pre><code>if again():
          print ('%s LAST: %s') % (k, tx)
          m = 1
          k = 0.001
          amount = k / 0.00000001
          amount = int(amount)
          print ('Doing %s k') % k
          do(amount, int(m))   # The error occurs here
  else:
       #code
  </code></pre>