Fredrik Lundh wrote: > John Salerno wrote: > >> But my real question is this, which is related to the above: >> >> "Name references search at most four scopes: local, then enclosing >> functions (if any), then global, then built-in." >> >> I understand what global and built-in are, and I thought I understood >> the concept of local too, but when I got to this sentence (and the >> previous sentence), I became confused about the first two scopes. What's >> the difference between 'local' and 'enclosing functions'? > > consider a nested function: > > var1 = "global" > > def outer(): > > var2 = "enclosing" > > def inner(): > > var3 = "local" > > print var1, var2, var3 > > inner() # call it > > inside "inner", var1 refers to the global variable, var2 to the enclosing > variable (which is local to "outer"), and var3 to the local variable. > > "enclosing scope locals" are also called "free variables". > > </F> > > >
Thanks guys. It seems like nested functions were what the authors had in mind, so that makes a lot more sense now. But as far as ifs and loops, is there such a thing as scope in them? For example, if I assign a variable within an if statement, is it usable anywhere else? -- http://mail.python.org/mailman/listinfo/python-list
