Python execute py script give me error

[verticaio]

python imdb_actor_import.py

Traceback (most recent call last):
File "imdb_actor_import.py", line 105, in
main(buffer)
File "imdb_actor_import.py", line 32, in main
somelines = buffer.split('THE %s LIST' % listname)[1]
MemoryError

[verticaio]

I solve this issue increase ram size but this isn't solution. Right solution as here
https://stackoverflow.com/questions/13488746/memory-error-when-parsing-large-file-python