CODEWITHSUNDEEP
pythonpython-3.x
draco_alpine
draco_alpine

Reputation: 785

Python: Storing List Objects Externally

I am currently running a project with a workflow in the following form:

An input goes through a slow (95% of programme runtime) process to form an output list (data). Fast operations are then performed on the list to create a final output.

Is there a sensible way I can store data externally to my python script so that I can run the slow process once and then trial the final stages (reading data in rather than reassembling it)?

EDIT: Considered exporting to 'simple' formats (MS Excel / MySQL) which proved unhelpful as the strings were both too long and contained special characters.

Upvotes: 0

Views: 415

Answers (1)

draco_alpine
draco_alpine

Reputation: 785

So it appears pickle was what I was searching for (thanks to corn3lius and Two-Bit Alchemist for their comments).

A simple example (reproduced from https://wiki.python.org/moin/UsingPickle):

# Save a dictionary into a pickle file.
import pickle
favorite_color = { "lion": "yellow", "kitty": "red" }
pickle.dump( favorite_color, open( "save.p", "wb" ) )

# Load the dictionary back from the pickle file.
import pickle

favorite_color = pickle.load( open( "save.p", "rb" ) )
# favorite_color is now { "lion": "yellow", "kitty": "red" }`

Upvotes: 1

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