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Public module variables:
whitespace -- a string containing all ASCII whitespace
ascii_lowercase -- a string containing all ASCII lowercase letters
ascii_uppercase -- a string containing all ASCII uppercase letters
ascii_letters -- a string containing all ASCII letters
digits -- a string containing all ASCII decimal digits
hexdigits -- a string containing all ASCII hexadecimal digits
octdigits -- a string containing all ASCII octal digits
punctuation -- a string containing all ASCII punctuation characters
printable -- a string containing all ASCII characters considered printable
ascii_lettersascii_lowercaseascii_uppercasecapwordsdigits hexdigits octdigits printable punctuation
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join. If the optional second argument sep is absent or None,
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and leading and trailing whitespace are removed, otherwise
sep is used to split and join the words.
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