FastLab

An extension library for FastAPI framework

Features

• FastLab
  • Features
  • Installation
  • Getting started
    • Logging
    • Models
      • 🔰 Response
      • 🔰 PageData
    • Utils
      • 🔰 TimeUtils
    • Routers
      • 🔰 HealthRouter
    • Decorators
      • 🔰 LogExecTime
      • 🔰 WithEnvConfig
  • Testing

Installation

use pip to install the package:

pip install fastlab

Getting started

Logging

Easy to log string to console, see more: https://docs.python.org/3/library/logging.html

from fastlab import logs

logs.warning('warn')    # 2021-12-18 14:23:31.000  WARNING 88493 --- [  MainThread] test_logs        : warn
logs.info('info')       # 2021-12-18 14:23:31.000     INFO 88493 --- [  MainThread] test_logs        : info
logs.error('error')     # 2021-12-18 14:23:31.000    ERROR 88493 --- [  MainThread] test_logs        : error

Models

Common Models

🔰 Response

from fastapi import FastAPI
from pydantic import BaseModel
from fastlab.models import Response


class Item(BaseModel):
    name: str
    version: str


app = FastAPI()


@app.get("/item", response_model=Response[Item])
async def item():
    return Response(data=Item(name='fastlab', version='0.1.0'))

Get http://localhost:8080/item response:

{
    "code": 0,
    "message": "",
    "data": {
        "name": "fastlab",
        "version": "0.1.0"
    }
}

🔰 PageData

from fastapi import FastAPI
from pydantic import BaseModel
from fastlab.models import Response, PageData


class Item(BaseModel):
    name: str
    version: str


app = FastAPI()


@app.get("/items", response_model=Response[PageData[Item]])
async def items(skip: int = 0, limit: int = 10):
    total = 100
    data = [Item(name=f'fastlab-{i}', version=f'0.1.{i}') for i in range(skip, skip + limit)]
    return Response(data=PageData(skip=skip, limit=limit, total=total, has_more=total > skip + limit, data=data))

Utils

🔰 TimeUtils

from fastlab.utils import TimeUtils

# Print now timestamp: 1639732030521
print(TimeUtils.timestamp())

Routers

🔰 HealthRouter

API for health check, endpoint /health.

from fastapi import FastAPI
from fastlab.routers import HealthRouter

app = FastAPI()
app.include_router(HealthRouter)

Decorators

🔰 LogExecTime

Log wrapper for measuring sync & async function execution times.

import asyncio
import time
from fastlab.decorators import LogExecTime, LogExecTimeAsync

@LogExecTime
def log_sleep():
    time.sleep(1.5)

@LogExecTimeAsync
async def log_sleep_async():
    await asyncio.sleep(1.5)

log_sleep()
asyncio.run(log_sleep_async())

🔰 WithEnvConfig

Replace the configuration with system environment variables. Follows:

1. Change the setting name to uppercase
2. Prefix it with prefix setting
3. Escape any underscores (_) by duplicating them
4. Convert all periods (.) to underscores (_)

from fastlab.decorators import WithEnvConfig

@WithEnvConfig(prefix='FL_')
def load_config():
    return {
      'name': 'fastlab', 
      'version': '0.2.1',
      'extra': {
        'memory_lock': False
      }
    }

conf = load_config()

For example, FL_EXTRA_MEMORY__LOCK=true transform conf['extra']['memory_lock'] as True

Testing

Install this package locally

python setup.py develop

Run test case

python tests/test_logs.py