Hi, I was looking at the example found here [1] which begins with:
[1] http://docs.python.org/py3k/library/imp.html#examples def __import__(name, globals=None, locals=None, fromlist=None): # Fast path: see if the module has already been imported. try: return sys.modules[name] except KeyError: pass I was wondering if the formulation if name in sys.modules: return sys.modules[name] would be equivalent. IOW, is using try/except here only a matter of style or a necessity? I'm suspecting that maybe, in multithreaded environments, the second option may be subject to a race condition, if another thread removes name frome sys.modules between the if and the return, but as I'm not very familiar (yet) with Python threads, I'm not sure it is a real concern here. And maybe there are other reasons I'm completely missing for prefering EAFP over LBYL here? Thanks in advance for your comments. -- Manuel Pégourié-Gonnard - http://people.math.jussieu.fr/~mpg/ -- http://mail.python.org/mailman/listinfo/python-list
