import re
 
strings = [
    "{tvg-id: , tvg-name: A beautiful Day - 2016, tvg-logo: https://i...content-available-to-author-only...b.org/t/p/w600_and_h900_bestv2/hZgsmIYUAtdUOUFKROq6rNyWXVa.jpg, group-title: 2017-16-15 Germany Cinema}",
    "{tvg-id: , tvg-name: Antonio, ihm schmeckt's nicht! (2016), tvg-logo: https://i...content-available-to-author-only...b.org/t/p/w600_and_h900_bestv2/dyLfGb1mF2PUd0Rz5kqKiYtQl3r.jpg, group-title: 2017-16-15 Germany Cinema}"
    ]
 
def convert(example):
    pattern = r"([^\s:,{}]+):\s*([^,{}]*)"
    dct = {}
    if example.endswith and example.startswith:
        for t in re.findall(pattern, example):
            if t[1].strip():
                dct[t[0]] = t[1]
            else:
                dct[t[0]] = None
    return dct
 
for s in strings:
    print(convert(s))

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