create-pandas-layer-4-lambda.md

Create the Layer package

cd lambda_layer_sample

mkdir python
cd python

pip install pandas -t ./

tree -L 1
.
├── bin
├── dateutil
├── numpy
├── numpy-1.20.3.dist-info
├── numpy.libs
├── pandas
├── pandas-1.2.4.dist-info
├── __pycache__
├── python_dateutil-2.8.1.dist-info
├── pytz
├── pytz-2021.1.dist-info
├── six-1.16.0.dist-info
└── six.py

zip -r pandas_layer.zip .

Create the Lambda Layer

Follow up the guide https://docs.aws.amazon.com/zh_cn/lambda/latest/dg/configuration-layers.html#configuration-layers-create

Create the lambda function for testing

Note if your layer created via python 3.7 runtime, you should also create the lambda function for python 3.7

Testing code

import json
import pandas as pd
import numpy as np

def lambda_handler(event, context):
    
    series = pd.Series([2, 4, 6, 8])
    print('Hello from Pandas, max value is ' + str(series.max()))
    a = np.array([2,3,4])
    print(a)
    return {
        'statusCode': 200,
        'body': json.dumps('Hello from Pandas, max value is  ' + str(series.max()) )
    }