# \#external-data

**URL:** https://fenicsproject.discourse.group/tag/external-data/47.md

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## [Newton and script dependant Neumann Boundary condition](https://fenicsproject.discourse.group/t/newton-and-script-dependant-neumann-boundary-condition/14882)

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**Author:** [@katkit](https://fenicsproject.discourse.group/u/katkit)\
**Replies:** 30\
**Last updated:** [September 24, 2024, 5:46pm UTC](https://fenicsproject.discourse.group/t/newton-and-script-dependant-neumann-boundary-condition/14882 "2024-09-24T17:46:41Z")

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Hi, i would like to implement a script dependant Neumann BC on Fenicsx 0.7.2. For information the non linear system to solve is the same as : Let’s say i have a python script that take values of x and values of u(x) a…