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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 _cc_round(num, dp):
 """ Convenience function to take a float and round it to dp padding with zeros to return a string :type num: float :param num: Number to round :type dp: int :param dp: Number of decimal places to round to. :returns: str 0.25 """

    num = round(num, dp)
    num = '{0:.{1}f}'.format(num, dp)
    return num