diff -r c3c3d1318130 -r 69dfdb26f600 svgui/pyjs/lib/pyjslib.py
--- a/svgui/pyjs/lib/pyjslib.py	Tue Aug 15 17:01:51 2017 +0300
+++ b/svgui/pyjs/lib/pyjslib.py	Tue Aug 15 22:38:43 2017 +0300
@@ -526,7 +526,7 @@
     def insert(self, index, value):
         JS("""    var a = this.l; this.l=a.slice(0, index).concat(value, a.slice(index));""")
 
-    def pop(self, index = -1):
+    def pop(self, index=-1):
         JS("""
         if (index<0) index = this.l.length + index;
         var a = this.l[index];
@@ -676,7 +676,7 @@
     def insert(self, index, value):
         JS("""    var a = this.l; this.l=a.slice(0, index).concat(value, a.slice(index));""")
 
-    def pop(self, index = -1):
+    def pop(self, index=-1):
         JS("""
         if (index<0) index = this.l.length + index;
         var a = this.l[index];