check for file type/class fails in python3

[raymondnijssen]

Already read that this library has not been fully tested in python3.

When using a POST request, there is a check for the file type here:
https://github.com/boundlessgeo/lib-qgis-commons/blob/1d93089fe95957ad9f6c87f037ee07196a0af640/qgiscommons2/network/networkaccessmanager.py#L222

That does not work in python3. A solution/workaround can be found here:
https://stackoverflow.com/questions/36320953/isinstance-file-python-2-7-and-3-5

I tried this and it works for me:

import io
try:
    file_types = (file, io.IOBase)
except NameError:
    file_types = (io.IOBase,)

with open("README.md", "r") as fin:
    print(isinstance(fin, file_types))

Should I do a pull request?

[volaya]

Sorry for not replying earlier, hadn't seen this.

I will make the change, no need for a PR

Thanks!

[raymondnijssen]

Thank you! 👍