Remove automatic open of filepath ?

[maingoh]

Currently if the field of the files dict is a string and exists on the disk we try to open it and send the file. It is probably to much magic, and may conflict if a value we want to send is by chance the same as a file on the disk. We should let the user open the file. Note that this may break some users (hopefully they don't use the feature).

[thomas-riccardi]

Related: http requests one-time inputs vs retry on error: need more control, even after #94:

for reference, after meeting with hugo and some tests:

• files accepts non-streamable too, the real constraint is: if it's streamable and non seekable, then we cannot support retries: raise error on second try (maybe on first too?)
  • also need to keep supporting non streamable objects: strings, bytes, bytearrays, etc.
  • also, isinstance(file, io.IOBase) is not enough: raw iterators work too, notably Django Files: https://docs.djangoproject.com/en/3.1/_modules/django/core/files/base/#File
• data accepts generator/iterator, or a dict (one level) of such thing: hard to check all that for now. maybe types constraints will help.

_Originally posted by @thomas-riccardi in https://github.com/Deepomatic/deepomatic-client-python/pull/94#discussion_r547376894_