Lexical variables and closures don't need each other, unless you define a closure as something that closes over its lexical variables.

x = "Hello"; # a global variable
def make_closure(arg):
    arg = arg # make arg a lexical variable
    return lambda y, arg=arg: print(x,y,arg)

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The indentation or braces are (mostly) equivalent in defining where a name/value binding may be visible, but that has nothing to do with closures.

And the OP issue of not knowing where/how a variable can be declared limited to a scope isn't an issue IMO because both Perl and Python have variables with limited scope which aren't visible "upwards".

In reply to Re^5: Evolution of python by Corion
in thread Evolution of python by betmatt

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