fix part of TODO function
finish worker.c (it seems like for undefined branches in mapper function, *ret_ptr must remain unchanged otherwise the integration test will time out error)
fixing client.c memory leaks
fix first define
client.c fixed 1 todo function
client.c finished
client.c finished, removed TODO comment
all .c files finished but admin.c
fix PyString_FromFormat to err_string with dealloc
fixing admin.c to line 370, to be continued