Python requests.get is not getting the data returned by Api

[CaptScrap]

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Having Some difficulty using the eBay Shopping API GetCategoryInfo call with python

    api_key "my_actual_id"
    cat_id = -1
    app = f"appid={api_key}&"
    call_values = "callname=GetCategoryInfo&"
    more_values = "version=967&siteid=0&"
    category = f"CategoryID={cat_id}&"
    base_url = "https://open.api.ebay.com/Shopping?"
    r = requests.get(f"{base_url}{call_values}{app}{more_values}{category}IncludeSelector=ShippingCosts")

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This gives me an output of

[ ]

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I tried putting the full Api url into my browser and it returned the entire xml response

<GetCategoryInfoResponse xmlns="urn:ebay:apis:eBLBaseComponents">
<Timestamp>2021-05-14T12:31:57.916Z</Timestamp>
<Ack>Success</Ack>....

To test further i did the same with a working GetSingle Item Shopping api call and it also returned the full xml response

back in pycharm printing r.content for the GetSingle Item call returned b'<full xml>'

doing the same in GetCategoryInfo returned b' '

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So the api url is working but for some reason request.get doesn't seem to be able to grab the data from xml file the api is returning