Import aeb43 file format on statement

assigned to @pokoli

added type::feature + 1 deleted label

added 1 deleted label and removed 1 deleted label

review43051002 updated at https://codereview.tryton.org/43051002/#ps1

The dependency to retrofix is not acceptable as it does not support Python3.
Also I could not find the repository.
What about: https://pypi.python.org/pypi/csb43
Adding a new dependency should be done carefully.

Also I'm wondering if you really need a library to parse a text file with fixed width. You could just use slice on each line.

> Also I'm wondering if you really need a library to parse a text file with fixed width. You could just use slice on each line.

I think this will be the easier way. So I removed the retrofix dependency and parsed the file by using slices.

review43051002 updated at https://codereview.tryton.org/43051002/#ps20001

review43051002 updated at https://codereview.tryton.org/43051002/#ps40001

review43051002 updated at https://codereview.tryton.org/43051002/#ps60001

After reviewing the code, I find that the parsing is more complex than just fixed position. I would prefer to have it in an external library.

I've created a Pull Requests on the csb43 library [1] in order to make the tablib dependency optional as we do not require it for parsing the file as json so we can keep the reduce de instalation dependencies.

If this pull request is accepted I think we can use the csb43 library.

[1] https://bitbucket.org/wmj/csb43/pull-requests/2/make-tablib-dependency-optional/diff