few fixes

src/scripts/graph_functions.py

@@ -188,7 +188,7 @@ def canontip(left, right):
     return (left, right)
 
 def getone(s):
-    assert len(s) == 1
+    assert len(s) >= 1
     for i in s:
         return i
 

src/scripts/pick_majority_bridge.py

@@ -41,9 +41,9 @@ def canon(p):
 	assert len(connectorlist) >= 1
 	for connection in connectorlist:
 		if connection[1]*2 >= connectorlist[0][1]:
-			print(pathstr(list(connection[0])))
+			print(gf.pathstr(list(connection[0])))
 		else:
-			forbidden.add(pathstr(list(connection[0])))
+			forbidden.add(gf.pathstr(list(connection[0])))
 
 with open(forbidden_paths_out_file, "w") as f:
 	for path in forbidden:

src/scripts/unroll_tip_loops.py

@@ -143,9 +143,8 @@ def iscanon(left, right):
 	if "<"+node in max_overlap: nodelen -= max_overlap["<"+node]
 	if nodelen <= 0: nodelen = 1
 
-	sys.stderr.write("Checking node %s with len %s coverage %s which is a tip that was not unrolled\n"%(node, nodelen, coverage[node]))
 	# if a node is short enough (we tolerate a bit longer than the unrolling length and doesn't look like it's high coverage enough to be unrolled then we drop it's loop edge and hope we can reconnect
-	if node in coverage and coverage[node] < 1.1*avg_coverage and nodelen <= max_unroll_length:
+	if node in coverage and coverage[node] < 1.1*avg_coverage and nodelen <= 1.5*max_unroll_length:
 		sys.stderr.write("%s removed edges\n"%(node))
 		del edges[">" + node]
 		del edges["<" + node]