casting with a parent

[reza-mousapour]

There is a cast(name A for example) that I have and I know its hash. I want to cast another cast(name B) and I want A to be B's parent. I tried post_cast() but I couldn't figure out how should I give the parent field true information. I have tried:
parent = hash_of _A
parent = A(the ApiCast type)
but none of them seemed to work. what is true format for doing this task? can you give me an example? I would appreciate it.

[lalitmehra99]

parent = {"fid": int(parent_fid), "hash": cast_hash}
client.post_cast(text="", parent=parent)

try this