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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_num_part_files():
 """Get the number of PART.html files currently saved to disk."""

    num_parts = 0
    for filename in os.listdir(os.getcwd()):
        if filename.startswith('PART') and filename.endswith('.html'):
            num_parts += 1
    return num_parts