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By dotCore
via python-history.blogspot.pt
Submitted: Nov 11 2013 / 00:46

A keyword, in the context of defining the syntax of a language, also known as a reserved word, is something that looks like an identifier in the language, but from the parser's point of view act like a token of the language. An identifier is defined as a sequence of one or more letters, digits and underscores, not starting with a digit. (This is Python's definition, but many languages, like C or Java, use the same or a very similar definition.)
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