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5.11 Lambdas

  lambda_form | ::= | "lambda" [parameter_list]: expression

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Lambda forms (lambda expressions) have the same syntactic position as expressions. They are a shorthand to create anonymous functions; the expression `lambda arguments: expression` yields a function object. The unnamed object behaves like a function object defined with

    def name(arguments):
        return expression

See section 7.6 for the syntax of parameter lists. Note that functions created with lambda forms cannot contain statements.