title: IndentationError: unindent does not match any outer indentation level python
body: <p>Hello here is my python code:</p>
  
  <pre><code>def is_palindrome(nombre):
      if str(nombre) == str(nombre)[::-1]:
          return True
      return False
  x = 0
  for i in range(100, 1000):
      for j in range(i, 1000):
          for z in range(j, 1000):    
   produit = i*j*z
  
          if is_palindrome(produit):
              if produit &gt; x:
                  x = produit
  print(x)
  </code></pre>
  
  <p>When I tried to compile this code I have got that error:
  produit = i<em>j</em>z
                    ^
  IndentationError: unindent does not match any outer indentation level
  Anyone has an idea please??</p>