Logged In: YES 
user_id=89016

Trapping only TypeError won't help:

class LazyFile:
   def __init__(self, name, mode="r"):
      self.name = name
      self.mode = mode
   def __iter__(self):
      return open(self.name, self.mode)
  
import operator
  
f = LazyFile(42)
  
s = reduce(operator.add, f)

Here the open call will raise a TypeError, that is totally
unrelated to the iterator protocol.

The cleanest solution would really be exception chaining.