Nick Coghlan wrote:
A custom generator will do nicely:

Py> def flatten(seq):
...   for x in seq:
...     if hasattr(x, "__iter__"):
...       for y in flatten(x):
...         yield y
...     else:
...       yield x

Avoiding LBYL gives you: def flatten(seq): for x in seq: try: for y in flatten(x): yield y except TypeError: yield x

--Scott David Daniels
[EMAIL PROTECTED]
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