---
id: mypy-boto3-fis
version: "1.43.0"
license: MIT
license_treatment: permissive
maintenance: active
---

# mypy-boto3-fis — Type annotations for boto3 FIS 1.43.0 service generated with mypy-boto3-builder 8.12.0

License: permissive · Maintenance: active · Downloads: 319.8K/mo

## What it is and what it does

This package is a type stub library for boto3's FIS (Fault Injection Simulator) service, generated automatically from boto3 1.43.0 using mypy-boto3-builder 8.12.0. It provides complete type annotations for FIS client operations, paginators, and type definitions, enabling static type checking and IDE autocomplete in VSCode, PyCharm, Emacs, Sublime Text, and other editors that support mypy or pyright.

When installed, it allows developers to write boto3 FIS code with full type safety—the IDE and type checker can catch errors at development time rather than runtime. It works transparently with boto3 without requiring explicit type annotations in most cases, though it can be used with TYPE_CHECKING guards to keep it out of production dependencies if needed.

Use it for:

- Enable IDE autocomplete and type checking for boto3 FIS API calls in VSCode with Pylance or PyCharm.
- Catch type errors in FIS client usage before runtime using mypy or pyright in CI/CD pipelines.
- Generate type-safe paginators for FIS list operations (list_actions, list_experiments, etc.).
- Document FIS API contracts in code through explicit type annotations for client, paginator, and response types.
- Use in a TYPE_CHECKING block to get development-time type hints without adding a runtime dependency.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides type annotations and IDE autocomplete support for the boto3 FIS (Fault Injection Simulator) service, enabling static type checking in mypy, pyright, and compatible editors.

Yes, if you use boto3 FIS in a Python project and want IDE autocomplete and static type checking. Install friction is minimal, maintenance is active, the license is permissive, and there are no known vulnerabilities. Consider boto3-stubs-lite as an alternative if you experience PyCharm performance issues with the full stub set.

## Install

pip install mypy-boto3-fis
uv add mypy-boto3-fis
poetry add mypy-boto3-fis

## Installing mypy-boto3-fis

Before you install: Low install friction with a single lightweight runtime dependency (typing-extensions). Actively maintained as of 2026-06-22 with stable production status.

License in practice: MIT license permits unrestricted use, modification, and distribution in both open-source and commercial projects.

Quickstart:

pip install mypy-boto3-fis

from boto3.session import Session
from mypy_boto3_fis import FISClient

client: FISClient = Session().client("fis")
# Type checking and IDE autocomplete now work for FIS operations

Requires Python 3.9 or later; best used alongside a type checker like mypy or pyright, or an IDE with type-aware language server support.

Verify before relying:

- Whether PyCharm performance issues mentioned in the description (issue PY-40997) have been resolved since the package was generated.
- Specific performance characteristics when used with boto3-stubs versus boto3-stubs-lite for FIS workloads.

## Package facts

- License: MIT (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 319.8K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

boto3 type stubs, aws fis type annotations, boto3 ide autocomplete, mypy boto3 stubs, fault injection simulator types, boto3 static type checking, aws sdk type hints, type-stubs, aws-sdk, ide-support

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