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# Release notes for cobrapy 0.7.0
## Fixes
- `cobra.flux_analysis.reaction.assess`
[was broken](https://github.com/opencobra/cobrapy/issues/537)
following the release of 0.6.0 and has now been fixed (and now with
unit tests).
- `production_envelope` failed when model C-source was formulated as
-> x instead of x <-. Fixed added option to guess the C-source by
taking the medium reaction with the highest input C flux.
- `model_to_pymatbridge` needs scipy and that's correctly handled now.
## New features
- `flux_variability_analysis` now has the `pfba_factor` parameter
which enables the inclusion of a constraint on the max sum of
absolute fluxes when doing FVA.
## Deprecated features
- `cobra.flux_analysis.reaction.assess_{precursors,products}` were
essentially copies of each other and have been merged to
`cobra.flux_analysis.reaction.assess_component`
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