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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_indentword(source):
 """Return indentation type."""

    indent_word = '    '  # Default in case source has no indentation
    try:
        for t in generate_tokens(source):
            if t[0] == token.INDENT:
                indent_word = t[1]
                break
    except (SyntaxError, tokenize.TokenError):
        pass
    return indent_word