Mike Meyer wrote: > On Thu, 10 Jan 2008 22:36:56 -0500 Marty <[EMAIL PROTECTED]> wrote: >> I recently faced a similar issue doing something like this: >> >> data_out = [] >> for i in range(len(data_in)): >> data_out.append([]) > > More succinctly: > > data_out = [] > for _ in data_in: > data_out.append([]) > > Or, as has already been pointed out: > > data_out = [[] for _ in data_in]
That's nice. > >> This caused me to wonder why Python does not have a "foreach" statement (and >> also why has it not come up in this thread)? I realize the topic has >> probably >> been beaten to death in earlier thread(s), but does anyone have the short >> answer? > > But I'm curious - what's the difference between the "foreach" you have > in mind and the standard python "for"? > > <mike For example, I thought the python "equivalent" of perl's foreach might be: data_out = [[] foreach data_in] Trying to answer my own question, if it comes down to a choice between a unique statement v. the anonymous variable "_", then I guess I can see why Python did it this way. -- http://mail.python.org/mailman/listinfo/python-list
