update _formitem so that it doesn't raise KeyError

[comhar]

If the user doesn't include all request params in their request a KeyError will be raised when running _find_p.

---

name: Pull Request
about: Propose changes to the codebase
title: '[PR] '
labels: ''
assignees: ''

---

Related Issue
#693

Proposed Changes
This pr updates _formitem so that is does a safe dict lookup and no longer throws a KeyError.

Types of changes
What types of changes does your code introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist
Go over all the following points, and put an x in all the boxes that apply:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I am aware that this is an nbdev project, and I have edited, cleaned, and synced the source notebooks instead of editing .py or .md files directly.

Additional Information
N/A

[gitnotebooks]

Found 1 changed notebook. Review the changes at https://app.gitnotebooks.com/AnswerDotAI/fasthtml/pull/694

[jph00]

Great PR @comhar -- thanks for the notes/tests in the nb :)