savepoint 0.1

A context manager that creates savepoints, avoiding recalculating expensive parts of the code.

An example:

from savepoint import SavePoint

a = 10
b = 20

# do some expensive calculation here
with SavePoint("stuff.p"):
    print "doing stuff"
    a += 10
    c = 30

print a, b, c

The first time the code is ran the with block is executed, and the modifed scope is pickled to stuff.p. Subsequent calls will update the global scope from the pickle file, and skip the block completely.