Christopher Lee wrote:
precedence when *both* occur in an expression, e.g. whether
x in y,z
what part of "comma is not an operator" is so hard to understand? the above is not an expression. it's two expressions, separated by commas. the first expression stops at the comma. the second expression follows after the comma.
commas can be a part of an expression only when they appear as part of a syntactic construct that allows commas (that is, parenthesized forms and displays, and the target list of a generator expression).
evaluates as
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