w1 done

main.py

@@ -0,0 +1,27 @@
+import sys
+
+from antlr4 import *
+from HelloLexer import HelloLexer
+from HelloParser import HelloParser
+from HelloListener import HelloListener
+
+from antlr4.tree.Trees import Trees
+
+
+def main(argv):
+    if len(argv) == 1:
+        InputStream = StdinStream()
+    else:
+        inpname = argv[1]
+        InputStream = FileStream(inpname)
+    lexer = HelloLexer(InputStream)
+    tokstream = CommonTokenStream(lexer)
+    parser = HelloParser(tokstream)
+
+    tree = parser.start()
+
+    print(Trees.toStringTree(tree, None, parser))
+if __name__ == '__main__':
+    main(sys.argv)
+
+