Below is the error when I am trying to install the particular version(1.2.1) of sceptre not the latest version,Please advise. Thanks.
$ pip install -e sceptre-1.2.1
sceptre-1.2.1 should either be a path to a local project or a VCS url beginning with svn+, git+, hg+, or bzr+
So the pip -e flag (edit mode) is maybe not doing what you think it should do here.
If you want to install a specific version of a package using pip you should do:
pip install sceptre==1.2.1
If you have installed sceptre globally across your system, rather than using a virtualenv then you may need to uninstall that package to use this specific version, but it is best to use a virtualenv.