added explicit pyhton2 binding where ambiguous (#2373)

tests/test_python3_compatibility.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+import os
+import ast
+import sys
+
+def test_source_code_compatible(code_data):
+    try:
+        return ast.parse(code_data)
+    except SyntaxError as exc:
+        return False
+
+paparazzi_home = os.getenv("PAPARAZZI_HOME", os.path.normpath(os.path.join(os.path.dirname(os.path.abspath(__file__)), '../')))
+
+for root, dirs, files in os.walk(paparazzi_home):
+    for f in files:
+        file = os.path.join(root, f)
+        if file.endswith('.py') and os.access(file, os.X_OK) and file.find('ext') == -1 and file.find('test_python3_compatibility.py') == -1:
+            if 'pygtk' in open(file).read():
+                print("%s uses pygtk which is not be Python3 compatible" % (file))
+            ast_tree = test_source_code_compatible(open(file).read())
+            if not ast_tree:
+                print("%s might not be Python3 compatible" % (file))
+
+input("Press Enter to continue with trying to run scripts, many will not work simply due to bad inputs...")
+for root, dirs, files in os.walk(paparazzi_home):
+    for f in files:
+        file = os.path.join(root, f)
+        if file.endswith('.py') and os.access(file, os.X_OK) and file.find('ext') == -1 and file.find('test_python3_compatibility.py') == -1:
+            print("\n\nTesting " + file)
+            os.system('python3 ' + file)
+