Hello World!

is_git_repo.py
Check
(1) The current dir has a sub dir whose name is .git?
(2) The current dir'name is ended with .git?
(3) The current direcoty is contained in a dir whos name is ended with .git.

For example,
In /home/jim/workspace/abc.git
>>> find . -maxdepth 1 -type d
.
./.git

(1) Yes
(2) Yes
(3) No

In /home/jim/workspace/src
.
./bin
./lib

(1) No
(2) No
(3) No