Replace deprecated library function os.popen() with subprocess

os.popen() is deprecated since version 2.6. Resolved with use of
subprocess module.

Change-Id: I5e8a3cb1d2a50656025ca0fec5f95b581f0af7b4
Closes-Bug: #1529836

1 files changed, 5 insertions, 2 deletions

diff --git a/doc/source/conf.py b/doc/source/conf.py
index cc18c90..8854a5b 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -13,6 +13,7 @@
 
 import datetime
 import os
+import subprocess
 import sys
 
 # If extensions (or modules to document with autodoc) are in another directory,
@@ -137,8 +138,10 @@ html_static_path = []
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
-git_cmd = "git log --pretty=format:'%ad, commit %h' --date=local -n1"
-html_last_updated_fmt = os.popen(git_cmd).read()
+git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
+    "-n1"]
+html_last_updated_fmt = subprocess.Popen(
+    git_cmd, stdout=subprocess.PIPE).communicate()[0]
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.