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-rw-r--r--examples/protobuf_parser.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/examples/protobuf_parser.py b/examples/protobuf_parser.py
index ad5db3a..68a8f63 100644
--- a/examples/protobuf_parser.py
+++ b/examples/protobuf_parser.py
@@ -17,7 +17,7 @@ LBRACE,RBRACE,LBRACK,RBRACK,LPAR,RPAR,EQ,SEMI = map(Suppress,"{}[]()=;")
kwds = """message required optional repeated enum extensions extends extend
to package service rpc returns true false option import"""
for kw in kwds.split():
- exec("{}_ = Keyword('{}')".format(kw.upper(), kw))
+ exec("{0}_ = Keyword('{1}')".format(kw.upper(), kw))
messageBody = Forward()