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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 merge_urls_data_to(to, food={}):
 """Merge urls data"""

    if not to:
        to.update(food)

    for url, data in food.items():
        if url not in to:
            to[url] = data
        else:
            to[url] = to[url].merge_with(data)