remove quirky use of bitwise AND in Python

diff --git a/tclpkg/gv/demo/modgraph.py b/tclpkg/gv/demo/modgraph.py
index b15890b2a84b69da2e5492237de24cc74a9fe781..c23b938bc2d1195717f8e281f3b686e414ce6340 100755 (executable)
--- a/tclpkg/gv/demo/modgraph.py
+++ b/tclpkg/gv/demo/modgraph.py
@@ -27,7 +27,7 @@ for rec in modules:
   fields = rec.split(" ")
   n = gv.node(G, fields[0])
   for usedby in fields[3].split(","):
-    if (usedby != "-") & (usedby != ""):
+    if usedby not in ("-", ""):
       gv.edge(n, gv.node(G, usedby))
 
 gv.layout(G, "dot")