Python : List of dict, if exists increment a dict value, if not append a new dict

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I would like do something like that.

list_of_urls = ["http://www.google.fr/", "http://www.google.fr/", 
                "http://www.google.cn/", "http://www.google.com/", 
                "http://www.google.fr/", "http://www.google.fr/", 
                "http://www.google.fr/", "http://www.google.com/", 
                "http://www.google.fr/", "http://www.google.com/", 
                "http://www.google.cn/"]

urls = [{"url": "http://www.google.fr/", "nbr": 1}]

for url in list_of_urls:
    if url in [f["url"] for f in urls]:
         urls[??]["nbr"] += 1
    else:
         urls.append({"url": url, "nbr": 1})

How can I do ? I don"t know if I should take the tuple to edit it or figure out the tuple indices?

Any help ?

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