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

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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]

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