如何转换"key=value，key=value，...“当一些值包含分隔符作为值的一部分时转换为csv？

def convert_to_csv(input_string):
    pairs = input_string.split(",")
    csv_rows = []
    for pair in pairs:
        key, value = pair.split("=")
        if "," in value:
            value = "\"" + value.replace("\"", "\"\"") + "\""
        csv_rows.append(key + "=" + value)
    csv_string = ",".join(csv_rows)
    return csv_string

input_string = "key1=value1,key2=value2,value3,value4,key3=value5,value6=value7,value8"
csv_string = convert_to_csv(input_string)
print(csv_string)

key1=value1,key2=value2,"value3,value4",key3=value5,value6=value7,value8