Fix a ResourceWarning in generate_opcode_h.py

vstinner · vstinner · commit 6193ecd77907 · 2016-11-25T11:59:52.000+01:00
Use a context manager to close the Python file. Replace also open() with
tokenize.open() to handle coding cookie if any in Lib/opcode.py.
diff --git a/Tools/scripts/generate_opcode_h.py b/Tools/scripts/generate_opcode_h.py
@@ -32,10 +32,14 @@
 #endif /* !Py_OPCODE_H */
 """
 
+import tokenize
+
 
 def main(opcode_py, outfile='Include/opcode.h'):
     opcode = {}
-    exec(open(opcode_py).read(), opcode)
+    with tokenize.open(opcode_py) as fp:
+        code = fp.read()
+    exec(code, opcode)
     opmap = opcode['opmap']
     with open(outfile, 'w') as fobj:
         fobj.write(header)
