ete3 does not need six anymore for a long time

README.md

@@ -45,9 +45,8 @@ All changes are logged in the [CHANGELOG](CHANGELOG.md)
 #### If you supply custom trees (Optional)
 
 - ete3
-- six
 
-Note that ete3 and six are not automatically installed. You can do `pip install ete3 six` to get them
+Note that ete3 is not automatically installed. You can do `pip install ete3` to get it
 
 #### Using the GUI (Optional)
 

README_pypi.md

@@ -11,9 +11,8 @@ Dependencies
 If you supply custom trees (Optional)
 
 - ete3
-- six
 
-Note that ete3 and six are not automatically installed. You can do `pip install ete3 six` to get them
+Note that ete3 is not automatically installed. You can do `pip install ete3` to get it
 
 Using the GUI (Optional)
 

docs/tex/scoary_manual.tex

@@ -59,13 +59,12 @@
     \begin{itemize}
 
       \item ete3
-      \item six
 
     \end{itemize}
 
-    \noindent Note that ete3 and six are not automatically installed. To get them use 
+    \noindent Note that ete3 is not automatically installed. To get it use 
     \begin{lstlisting}[language=python, basicstyle=\small]
-      $ pip install ete3 six
+      $ pip install ete3
     \end{lstlisting}
 
     \noindent Using the GUI (Optional)
@@ -473,4 +472,4 @@
   \bibliography{citations}
   \bibliographystyle{unsrt}
 
-\end{document}
+\end{document}

requirements.txt

@@ -1,4 +1,3 @@
 scipy
 argparse
 ete3
-six

scoary/nwkhandler.py

@@ -3,9 +3,8 @@
 try:
     from ete3 import Tree
     from ete3.parser.newick import NewickError
-    import six
 except ImportError:
-    sys.exit("ERROR: Could not import ete3. You need 'ete3' AND 'six' installed to read custom trees.")
+    sys.exit("ERROR: Could not import ete3. You need 'ete3' installed to read custom trees.")
 
 def ReadTreeFromFile(filepath):
     """