Question

I’m getting a Memory error in Python, this isn’t surprising, but I need an alternative. So I’m using several for satements which to my knowledge store the values in memory. What should I switch the for statements to so they save it to something that won’t save to memory. Would saving it to a text file be a better route? The code is below to help answer what I should do. I’d like examples of any of your ideas.

def product(*args, **kwds):
    pools = map(tuple, args) * kwds.get('repeat', 1)
    result = [[]]
    for pool in pools:
        result = [x+[y] for x in result for y in pool]
    for prod in result:
        yield tuple(prod)

def start():
    for chars in product("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ12234567890!@#$%^&*?,()-=+[]/;", repeat = 4):
        print chars

Answer 1

Use itertools.product:

from itertools import product

def start():
    for chars in product("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ12234567890!@#$%^&*?,()-=+[]/;", repeat = 4):
        print chars

From the documentation:

This function is equivalent to the following code, except that the actual implementation does not build up intermediate results in memory