Writing Polish text into a file using Python

i need to write some polish text into a new file, so I have tried:

myLines = somePolishText
file = open('myText.txt', 'w')
file.writelines(myLines)

at this point, I've got an error like this:
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0119' in position 29: ordinal not in range(128)


After lots of recharch and findings, I have change the same code like this:

import codecs

myLines = somePolishText
file = codecs.open('myText.txt', 'w', 'utf-8')
file.writelines(myLines)

and its works for me pritty well.

Thanks
Sakib