Cache

python-web-io works by re-evaluating the target script after each user interaction, to progress the script to the next input(), etc. This means expensive functions may be called more than once per session. To reduce latency, a cache decorator is made available through the python_web_io module. The @cache_to_file() decorator accepts a string argument: file_path, which indicates where the cache (a .pkl file) should be stored.

import python_web_io as io

@io.cache_to_file('cache.pickle')
def expensive_function(arg):
    # Calculate the result here
    return result