namedtuple, zip(*), deque____usage

In [1]: from collections import namedtuple , deque
   ...: Transition = namedtuple('Transition',
   ...:                         ('state', 'action', 'next_state', 'reward'))
   ...: 
   ...: print(Transition)
   ...: 
   ...: # bat=Transition(*zip(*transitions))


In [2]: memory=deque([])

In [3]: memory
Out[3]: deque([])

In [4]: memory.append(Transition(*([1],[2],[3],[4])))

In [5]: memory
Out[5]: deque([Transition(state=[1], action=[2], next_state=[3], reward=[4])])

In [6]: memory.append(Transition(*([11],[22],[33],[44])))

In [7]: memory
Out[7]: 
deque([Transition(state=[1], action=[2], next_state=[3], reward=[4]),
       Transition(state=[11], action=[22], next_state=[33], reward=[44])])

In [8]: memory.append(Transition(*([111],[222],[333],[444])))

In [9]: memory
Out[9]: 
deque([Transition(state=[1], action=[2], next_state=[3], reward=[4]),
       Transition(state=[11], action=[22], next_state=[33], reward=[44]),
       Transition(state=[111], action=[222], next_state=[333], reward=[444])])

In [10]: un_zip=zip(*memory)

In [11]: un_zip
Out[11]: 

In [12]: un_zip_list = list(un_zip)

In [13]: for item in un_zip_list:
    ...:     print(item)
    ...: 
([1], [11], [111])
([2], [22], [222])
([3], [33], [333])
([4], [44], [444])

In [14]: for item in un_zip_list:
    ...:     print(type(item))
    ...: 







In [16]: new_state=Transition(*un_zip_list)

In [17]: new_state
Out[17]: Transition(state=([1], [11], [111]), action=([2], [22], [222]), next_state=([3], [33], [333]), reward=([4], [44], [444]))