[Python-ideas] Non-boolean return from contains (original) (raw)

Terry Reedy tjreedy at udel.edu
Thu Jul 29 19🔞42 CEST 2010

On 7/27/2010 2:04 PM, Guido van Rossum wrote:

On Tue, Jul 27, 2010 at 5:25 PM, Robert Kern<robert.kern at gmail.com> wrote:

I've occasionally wished that we could repurpose backticks for expression literals:

expr = x + y*z assert isinstance(expr, ast.Expression) Maybe you could just as well make it a plain string literal and call a function that parses it into a parse tree: expr = parse("x + y*z") assert isinstance(expr, ast.Expression) The advantage of this approach is that you can define a different language too...

and that is already exists, and is more visible than backticks

def expr(s): return ast.parse(s, mode='eval') # defaults is 'exec'

e = expr('a+b') e <_ast.Expression object at 0x00F8DCF0>

-- Terry Jan Reedy

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