Hi, this is rather late but I also ran into this issue and realized that the JSON format should be
{ “A” : string, “B”: list of string, “C”: list of list of bool }
{ “A” : string, “B”: list of string, “C”: list of list of bool }
...
{ “A” : string, “B”: list of string, “C”: list of list of bool }
basically each dictionary’s JSON str is delimited with a newline character, instead of having all the dictionaries in a list when being dumped to a file.