added quick-plot help option

python/asgard.py

@@ -261,8 +261,27 @@ def __str__(self):
         return s
 
 if __name__ == "__main__":
-    if len(sys.argv) < 2:
+    if len(sys.argv) < 2 or sys.argv[1] in ("-v", "-version", "--version"):
         libasgard.asgard_print_version_help()
+    elif sys.argv[1] in ("-h", "-help", "--help"):
+        print("")
+        print("python -m asgard plt.data")
+        print("   makes a quick 1D or 2D plot of output contained in out.data")
+        print("")
+        print("python -m asgard -g plt.data")
+        print("   makes a quick 1D or 2D plot of the grid contained in out.data")
+        print("")
+        print("python -m asgard -s plt.data")
+        print("   shows summary of the snapshot contained in the out.data")
+        print("")
+        print("options:")
+        print(" -h, -help, --help           : shows this help text")
+        print(" -v, -version, --version     : shows the library version info")
+        print(" -s, -stat, -stats, -summary : shows the summary of a snapshot")
+        print(" -g, -grid                   : plot the grid")
+        print("")
+        print("no file and no option provided, shows the version of the")
+        print("")
     elif sys.argv[1] in ("-s", "-stat", "-stats", "-summary"):
         if len(sys.argv) < 3:
             print("stats summary option requires a filename")