--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ply-3.8/test/pkg_test4/__init__.py	Wed Mar 23 02:40:16 2016 +0000
@@ -0,0 +1,25 @@
+# Tests proper handling of lextab and parsetab files in package structures
+# Check of warning messages when files aren't writable
+
+# Here for testing purposes
+import sys
+if '..' not in sys.path:  
+    sys.path.insert(0, '..')
+
+import ply.lex
+import ply.yacc
+
+def patched_open(filename, mode):
+    if 'w' in mode:
+        raise IOError("Permission denied %r" % filename)
+    return open(filename, mode)
+
+ply.lex.open = patched_open
+ply.yacc.open = patched_open
+try:
+    from .parsing.calcparse import parser
+finally:
+    del ply.lex.open
+    del ply.yacc.open
+
+