diff --git a/tools/python_branch_history.py b/tools/python_branch_history.py
new file mode 100644
index 000000000..1d157b3a0
--- /dev/null
+++ b/tools/python_branch_history.py
@@ -0,0 +1,83 @@
+#!/usr/bin/python
+# usage example: python python_branch_history.py "2017 3 22 23 40"
+#
+import base64
+import datetime
+import os
+import gitlab
+import sys
+
+def main():
+    # token authentication from config file
+    gl = gitlab.Gitlab.from_config(config_files=['/Users/victorzhang/.python-gitlab.cfg'])
+
+    # projects 
+    # Note: difference among gl.projects.list() / gl.projects.list(all=True) / gl.projects.owned() 
+    projects = gl.projects.list(all=True)
+    print('all projects count: ' + str(len(projects)))
+    print('all projects name - ')
+    project_release_branches = []
+
+    for project in projects:
+        # use try/except to avoid script exit from exception when there's no 'release' branch
+        try:
+            print('  '+ project.name)
+            project_release_branch = project.branches.get('release')
+        except Exception:
+            project_release_branch = None
+
+        if project_release_branch is not None : 
+            latest_comitted_date = project_release_branch.commit['committed_date']
+            project_release_branches.append({'name':project.name, 'latest_modified':latest_comitted_date})
+
+
+    # Sort branches by modified time 
+    project_release_branches.sort(key=lambda r: r['latest_modified'], reverse=True)
+
+    # print result
+    export(project_release_branches)
+
+def export(branches):
+    script_dir = os.path.dirname(__file__) #<-- absolute dir the script is in
+    rel_path = "release_branches.md"
+    abs_file_path = os.path.join(script_dir, rel_path)
+    temp_argv_list = sys.argv[1].split()
+    year   = int(temp_argv_list[0])
+    month  = int(temp_argv_list[1])
+    day    = int(temp_argv_list[2])
+    hour   = int(temp_argv_list[3])
+    minute = int(temp_argv_list[4])
+    valid_date = unicode(datetime.datetime(year,month,day,hour,minute))
+
+    print('\n')
+    print('projects (have release branch) - ')
+
+    with open(abs_file_path, mode="w") as out_file:
+        out_file.write("|Project name|release branch latest modified time|Release or not(Yes/No)|\n")
+        out_file.write("|---|---|---|\n")
+        for branch in branches:
+            project_name = branch['name']
+            latest_modified = branch['latest_modified']
+            release_or_not = 'Yes'
+
+            if latest_modified < valid_date:
+                release_or_not = 'No'
+
+            print('  project name:  ' + project_name + ' | ' + 'release branch latest modified time: ' + latest_modified + ' | ' + 'Release or not(Yes/No) : ' + release_or_not )
+
+            out_file.write("|")
+            out_file.write(project_name)
+            out_file.write("|")
+            out_file.write(latest_modified)
+            out_file.write("|")
+            out_file.write(release_or_not)
+            out_file.write("|")
+            out_file.write("|\n")
+
+if __name__ == "__main__":
+    if (len(sys.argv) == 2):
+        main()
+    else:
+        print('wrong arguments number(2 arguments)!')
+    
+    
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