[IMP] Direct informational messages to stderr.

This allows the GEDCOM output to be piped to another program without
polluting it with progress messages.

The usage text is now also directed to stderr, as is normal practice.

TESTED:
Piped output to an editor, with the progess messages still appearing
on the terminal.
Usage text now appears on the terminal, even with redirected stdout.

diff --git a/getmyancestors.py b/getmyancestors.py
index 12e4626d7baa788dec8ff9adee1bafe3ddbfb3cf..a121a3229e169ca1e28d89d954db84efce68afb6 100755 (executable)
--- a/getmyancestors.py
+++ b/getmyancestors.py
@@ -1158,7 +1158,7 @@ def main():
         parser.error = parser.exit
         args = parser.parse_args()
     except SystemExit:
-        parser.print_help()
+        parser.print_help(file=sys.stderr)
         sys.exit(2)
     if args.individuals:
         for fid in args.individuals:
@@ -1194,7 +1194,7 @@ def main():
             print("Unable to write %s: %s" % (settings_name, repr(exc)), file=sys.stderr)
 
     # initialize a FamilySearch session and a family tree object
-    print("Login to FamilySearch...")
+    print("Login to FamilySearch...", file=sys.stderr)
     fs = Session(args.username, args.password, args.verbose, args.logfile, args.timeout)
     if not fs.logged:
         sys.exit(2)
@@ -1210,7 +1210,7 @@ def main():
     try:
         # add list of starting individuals to the family tree
         todo = args.individuals if args.individuals else [fs.fid]
-        print(_("Downloading starting individuals..."))
+        print(_("Downloading starting individuals..."), file=sys.stderr)
         tree.add_indis(todo)
 
         # download ancestors
@@ -1220,7 +1220,8 @@ def main():
             if not todo:
                 break
             done |= todo
-            print(_("Downloading %s. of generations of ancestors...") % (i + 1))
+            print(_("Downloading %s. of generations of ancestors...") % (i + 1),
+                  file=sys.stderr)
             todo = tree.add_parents(todo) - done
 
         # download descendants
@@ -1230,12 +1231,14 @@ def main():
             if not todo:
                 break
             done |= todo
-            print(_("Downloading %s. of generations of descendants...") % (i + 1))
+            print(_("Downloading %s. of generations of descendants...") %
+                  (i + 1), file=sys.stderr)
             todo = tree.add_children(todo) - done
 
         # download spouses
         if args.marriage:
-            print(_("Downloading spouses and marriage information..."))
+            print(_("Downloading spouses and marriage information..."),
+                  file=sys.stderr)
             todo = set(tree.indi.keys())
             tree.add_spouses(todo)
 
@@ -1264,7 +1267,8 @@ def main():
                 else ""
             )
             + (_(" and contributors") if args.get_contributors else "")
-            + "..."
+            + "...",
+            file=sys.stderr
         )
         loop.run_until_complete(download_stuff(loop))
 
@@ -1284,7 +1288,8 @@ def main():
                 str(len(tree.notes)),
                 str(round(time.time() - time_count)),
                 str(fs.counter),
-            )
+            ),
+            file=sys.stderr
         )