$> pip install --upgrade GitPythonCollecting GitPython  Downloading GitPython-2.1.3-py2.py3-none-any.whl (442kB)Requirement already up-to-date: gitdb2>=2.0.0in /home/yoh/proj/datalad/datalad/venv-tests/lib/python2.7/site-packages (from GitPython)Requirement already up-to-date: smmap2>=2.0.0in /home/yoh/proj/datalad/datalad/venv-tests/lib/python2.7/site-packages (from gitdb2>=2.0.0->GitPython)Installing collected packages: GitPython  Found existing installation: GitPython 2.1.0    Uninstalling GitPython-2.1.0:      Successfully uninstalled GitPython-2.1.0Successfully installed GitPython-2.1.3You are using pip version 7.1.2, however version 9.0.1 is available.You should consider upgrading via the'pip install --upgrade pip' command.$> python -c'from git import Repo; print Repo(".").submodules'Traceback (most recent call last):  File"<string>", line 1,in<module>  File"/home/yoh/proj/datalad/datalad/venv-tests/local/lib/python2.7/site-packages/git/repo/base.py", line 290,in submodulesreturn Submodule.list_items(self)  File"/home/yoh/proj/datalad/datalad/venv-tests/local/lib/python2.7/site-packages/git/util.py", line 932,in list_items    out_list.extend(cls.iter_items(repo,*args,**kwargs))  File"/home/yoh/proj/datalad/datalad/venv-tests/local/lib/python2.7/site-packages/git/objects/submodule/base.py", line 1181,in iter_items    sm = rt[p]  File"/home/yoh/proj/datalad/datalad/venv-tests/local/lib/python2.7/site-packages/git/objects/tree.py", line 293,in __getitem__    info = self._cache[item]IndexError: list index out of range$> git submodule+60d265e09441a6316f7c3336c0eba4370afed2ac 2009 (heads/master)+5cdff4402dec87be62ae0ba197c63ad1da7ba2c2 2010 (heads/master)+e5638100b6e4514a6e6e7379a581fb2801b7a59b 2011 (heads/master)+62bf8ad207a8d70706a3b1288e2aaa6b1efe20ed 2013 (heads/master)+214a854c94d9d8c5283643a59fb633f46563fbd0 2014 (heads/master)+a6770f5aa5c8552b3cd803b138e5ae71c281188b 2015 (heads/master)+4790ba30c6e666c86ec26d78042eb2a82cb043f8 2016 (heads/master)+bf191a0120bce11be84f3e9a260eb830939fecbc 2017 (heads/master)$> git diffdiff --git a/2009 b/2009index b547198..60d265e 160000--- a/2009+++ b/2009@@ -1 +1 @@-Subproject commit b547198f5c417a88fa3e683c7a73b2ba014b2331+Subproject commit 60d265e09441a6316f7c3336c0eba4370afed2ac...$> head .gitmodules [submodule"2009"]path = 2009url = ./2009[submodule"2010"]path = 2010url = ./2010[submodule"2011"]path = 2011url = ./2011

$> rm -rf /tmp/test&& mkdir /tmp/test&&cd /tmp/test; git init;echo smth> smth; git add smth; git commit -m smth; mkdir sub;cd sub; git init;echo 123> 123; git add 123; git commit -m added;cd ../; git submodule add ./sub sub;cd sub;echo 124>| 123; git add 123; git commit -m changed;cd ..; git submodule; python -c'from git import Repo; print Repo(".").submodules'Initialized empty Git repositoryin /tmp/test/.git/[master (root-commit) bbfc6e1] smth 1 file changed, 1 insertion(+) create mode 100644 smthInitialized empty Git repositoryin /tmp/test/sub/.git/[master (root-commit) 6063d92] added 1 file changed, 1 insertion(+) create mode 100644 123smth  sub/Adding existing repo at'sub' to the index123[master 4a3e397] changed 1 file changed, 1 insertion(+), 1 deletion(-)smth  sub/+4a3e397542e87ff842555f8f6c6fdfafffa0c375 sub (heads/master)[git.Submodule(name=sub, path=sub, url=./sub, branch_path=refs/heads/master)]changes on filesystem:                                                                                                                                                                                                                        sub| 2 +-cached/staged changes: .gitmodules| 3 +++ sub| 1 +