[Piyopiyokai # 1] Let's play with Lambda: Creating a Python script

Handslab Piyopiyokai # 1 https://handslab.doorkeeper.jp/events/42327 This is the material.

Prerequisites

--I have an AWS account --You have permission to operate AWS Lambda with this account --Has a Twitter API key and access token --Pip command can be used in the terminal

Script creation

__ Work with the client using a text editor. __

--Create a Python script "lambda_function.py". --Prepare the module to be used in the working directory --Zip the working directory

Working directory preparation

Prepare a working directory under the user directory. Execute the following command in the terminal

`command`


cd ~
mkdir piyopiyo2

`Verification`


ls | grep piyopiyo2

`result`


piyopiyo2

Go to your working directory and work.

`command`


cd piyopiyo2

`Verification`

pwd

`result`


/Users/****/piyopiyo2

Installation of external modules

Install the external module you want to use in your working directory. This time we will use tweepy as a module Reference: Reference

`command`


pip install tweepy -t ./

`Verification`

ls

`result`


examples				requests_oauthlib-0.6.1.dist-info
oauthlib				six-1.10.0.dist-info
oauthlib-1.0.3-py2.7.egg-info		six.py
requests				six.pyc
requests-2.9.1.dist-info		tweepy
requests_oauthlib			tweepy-3.5.0.dist-info

Replace with the key obtained during the''xxxxxxxxxxxxxxxxxxx'

Creating lamba_function.py

Create a Python script. Create a script with the name lamba_function.py in the current directory (the directory where you installed the module with pip).

A quick summary of the basics of Python Reference: Summary of studying Python to use AWS Lambda

`lamba_function.py`


import json
import tweepy

CONSUMER_KEY = 'xxxxxxxxxxxxxxxxxxxx'
CONSUMER_SECRET = 'xxxxxxxxxxxxxxxxxxxx'
ACCESS_TOKEN = 'xxxxxxxxxxxxxxxxxxxx'
ACCESS_TOKEN_SECRET = 'xxxxxxxxxxxxxxxxxxxx'



def lambda_handler(event, context):
    
    client = tweepy_client()
    post_message = 'Hands-Lab piyopiyo kai'
    post_twitter(client, post_message)
    
    
    
    
def post_twitter(client, message):
    API = client
    text = message
    req = API.update_status(text)
    
    return req
    
    
    
    
def tweepy_client():
    
    consumer_key = CONSUMER_KEY
    consumer_secret = CONSUMER_SECRET
    access_token = ACCESS_TOKEN
    access_token_secret = ACCESS_TOKEN_SECRET
    
    auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
    auth.set_access_token(access_token, access_token_secret)
    api = tweepy.API(auth)
    
    return api