Update TF backend with the one in Qibo

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.88%. Comparing base (7aa0942) to head (e1ab50b). Report is 9 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/qiboteam/qiboml/pull/40?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) ```diff @@ Coverage Diff @@ ## main #40 +/- ## =========================================== + Coverage 49.26% 73.88% +24.61% =========================================== Files 8 5 -3 Lines 479 134 -345 =========================================== - Hits 236 99 -137 + Misses 243 35 -208 ``` | [Flag](https://app.codecov.io/gh/qiboteam/qiboml/pull/40/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/qiboteam/qiboml/pull/40/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam) | `73.88% <ø> (+24.61%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam#carryforward-flags-in-the-pull-request-comment) to find out more. [see 3 files with indirect coverage changes](https://app.codecov.io/gh/qiboteam/qiboml/pull/40/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiboteam)

[BrunoLiegiBastonLiegi]

Can you ignore the coverage of the modules tested in qibo? https://docs.codecov.com/docs/ignoring-paths