The following identifiers are used as reserved words, or keywords of the
language, and cannot be used as ordinary identifiers. They must be spelled exactly as
and del for is raise
assert elif from lambda return
break else global not try
class except if or while
continue exec import pass yield
def finally in print
Note that although the identifier
as can be used as part of the syntax of import statements, it is not currently a reserved word.
In some future version of Python, the identifiers
will both become keywords.