You can simply write the line to file using write function.
f = open('myfile', 'w') f.write('hi there\n') # python will convert \n to os.linesep f.close() # you can omit in most cases as the destructor will call it
Alternatively, you can use the print() function which is available since Python 2.6+
from __future__ import print_function # Only needed for Python 2 print("hi there", file=f)
For Python 3 you don't need the import, since the print() function is the default.