FAQ — Frequently asked questions

I get ImportError: No module named htf

Your copy of HILSTER Testing Framework is not installed. Read installation instructions and install it.

Check your $PYTHONPATH environment variable. It must include the path where the HILSTER Testing Framework installation is located. $PYTHONPATH is a list of paths where the python interpreter searches for python modules. Paths are separated by ; on Windows and : on Linux.

I get UnicodeDecodeError

By default all printed characters must be within 0 and 127. Some special characters are greater than 127 so that UnicodeDecodeError is raised.


You should deal with unicode wherever possible. In Python 3 all strings are unicode by default. Python 2.7 offers this possibility by importing the __future__ module.

Add a line # -*- coding: utf-8 -*- to your file header, and a line from __future__ import absolute_import, division, print_function, unicode_literals to save the file in UTF-8 format. This way you also write code that is compatible with Python 2.7 and 3.

Once __future__.unicode_literals is imported all strings "string and all docstrings are unicode by default.

If you don’t want to use the __future__ module, you can force a unicode-string with u" but be aware that docstrings are not unicode and special characters might lead to errors or might be ignored in test reports. For example u"Umlauts: ÄÖÜäöü" is a valid unicode string that does not lead to a UnicodeDecodeError.