bpo-29783: Replace codecs.open() with io.open() (#599)
diff --git a/Lib/lib2to3/pgen2/driver.py b/Lib/lib2to3/pgen2/driver.py
index a27b9cb..e5e4824 100644
--- a/Lib/lib2to3/pgen2/driver.py
+++ b/Lib/lib2to3/pgen2/driver.py
@@ -94,11 +94,8 @@
def parse_file(self, filename, encoding=None, debug=False):
"""Parse a file and return the syntax tree."""
- stream = codecs.open(filename, "r", encoding)
- try:
+ with io.open(filename, "r", encoding=encoding) as stream:
return self.parse_stream(stream, debug)
- finally:
- stream.close()
def parse_string(self, text, debug=False):
"""Parse a string and return the syntax tree."""