Add missing file

example/aitf/progress.py

+# python3
+
+# Copyright 2021 University of Wisconsin Regents
+# 
+# This file is part of csppfetch.
+# 
+# csppfetch is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# Foobar is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with Foobar.  If not, see <https://www.gnu.org/licenses/>.
+
+# System modules
+import os
+import sys
+
+import aitf.ancil
+csppfetch = aitf.ancil.csppfetch
+human_bytes = csppfetch.human_bytes
+
+class Progress(csppfetch.Progress):
+
+    def start_attempt(self, stats):
+        sys.stderr.write(f"Attempt {stats.current_attempt} out of maximum {stats.max_attempts}\n")
+
+    def start_fileset(self, stats):
+        sys.stderr.write( f"  Working on {stats.current_fileset_description}\n")
+
+    def finished_file(self, stats, local_path, is_cache_hit):
+        reason = "downloaded"
+        if is_cache_hit:
+            reason = "found in local cache"
+        sys.stderr.write(f"    {os.path.basename(local_path)} {reason}. (Downloaded {len(stats.downloaded_files)} files, {human_bytes(stats.downloaded_size)}. Found in cache {len(stats.cached_files)} files, {human_bytes(stats.cached_size)})\n")
+
+