id: no-comparison-to-none
valid:
  - 'if x is None:'
  - 'if x is not None:'
  - 'if x == 0:'
  - 'if x is None or y == 1:'
invalid:
  - 'if x == None:'
  - 'if x != None:'
  - 'if None == x:'
  - 'if x == None or y == 1:'