The latter is only used by the GUI. If you intend to import PySang as a module, you can do without it.
Install and call pysang. An example sequence is opened. Press Ctrl+O or use the mouse to open your Sanger sequence.
PySang is donated to the public domain. You may therefore freely copy it for any legal purpose you wish. Acknowledgement of authorship and citation in publications is appreciated.
Note: This program uses other Python modules that might have different license agreement. Those copyrights are still valid beyond this agreement. Thanks to the authors of those modules for their hard work.
THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.