How to save all the variables in the current python session?

Question

I want to save all the variables in my current python environment. It seems one option is to use the 'pickle' module. However, I don't want to do this for 2 reasons:

1. I have to call pickle.dump() for each variable
2. When I want to retrieve the variables, I must remember the order in which I saved the variables, and then do a pickle.load() to retrieve each variable.

I am looking for some command which would save the entire session, so that when I load this saved session, all my variables are restored. Is this possible?

Edit: I guess I don't mind calling pickle.dump() for each variable that I would like to save, but remembering the exact order in which the variables were saved seems like a big restriction. I want to avoid that.

Answer 1

If you use shelve, you do not have to remember the order in which the objects are pickled, since shelve gives you a dictionary-like object:

To shelve your work:

import shelve  T='Hiya' val=[1,2,3]  filename='/tmp/shelve.out' my_shelf = shelve.open(filename,'n') # 'n' for new  for key in dir():     try:         my_shelf[key] = globals()[key]     except TypeError:         #         # __builtins__, my_shelf, and imported modules can not be shelved.         #         print('ERROR shelving: {0}'.format(key)) my_shelf.close() 

To restore:

my_shelf = shelve.open(filename) for key in my_shelf:     globals()[key]=my_shelf[key] my_shelf.close()  print(T) # Hiya print(val) # [1, 2, 3]