parse a profile

[Jason Friedman]

I have a file I use for shell scripts that looks like this:

export VAR1=/path/to/dir
export VAR2=7
export VAR3=${VAR1}/further/path
# comment
.. /another/file

And a file /another/file:
export VAR4=database-name

Is there an existing package that will read such a file and return a
dictionary like this:
{
'VAR1': '/path/to/dir',
'VAR2': 7,
'VAR3': '/path/to/dir/further/path',
'VAR4': 'database-name',
}