ch01: wrap program into a main function

JBSP-code · JBSP-code · commit 733c30b7be9e · 2023-01-02T13:42:33.000+01:00
diff --git a/01_hello/hello.py b/01_hello/hello.py
@@ -3,9 +3,15 @@
 
 import argparse
 
-parser = argparse.ArgumentParser(description="Say hello")
-parser.add_argument(
-    "-n", "--name", metavar="name", default="World", help="Name to greet"
-)
-args = parser.parse_args()
-print("Hello, " + args.name + "!")
+
+def main():
+    parser = argparse.ArgumentParser(description="Say hello")
+    parser.add_argument(
+        "-n", "--name", metavar="name", default="World", help="Name to greet"
+    )
+    args = parser.parse_args()
+    print("Hello, " + args.name + "!")
+
+
+if __name__ == "__main__":
+    main()
