... lines = f.readlines()
>>> if export_already_exists == False:
... os.remove(file_name)
->>> print len(lines)
+>>> len(lines)
2049
->>> print ''.join(lines[:5]), # doctest: +ELLIPSIS, +REPORT_UDIFF +NORMALIZE_WHITESPACE
+>>> print(''.join(lines[:5]).rstrip())
+... # doctest: +ELLIPSIS, +REPORT_UDIFF +NORMALIZE_WHITESPACE
# z piezo (m) deflection (m)
-1.519...e-07 9.094...e-08
-1.513...e-07 9.130...e-08