On 6/3/2019 8:57 PM, James Lu wrote:
`if-unless` expressions in Python
if condition1 expr unless condition2
is an expression that roughly reduces to
expr if condition1 and not condition2 else EMPTY
An expression MUST evaluate to a value. EMPTY is spelled None in
Python. No need for an alternate spelling.
The only place that None is implicit rather than explicit is the
implicit 'return None' *statement* at the end of functions. That is enough.
--
Terry Jan Reedy
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