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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 iter_token_lines(tokenlist):
 """ Iterator that yields tokenlists for each line. """

    line = []
    for token, c in explode_tokens(tokenlist):
        line.append((token, c))

        if c == '\n':
            yield line
            line = []

    yield line