【GAS】PythonでGmail APIを使って、メール内容を取得する流れ【スクリプト作成編】

class GmailAPI:
    def __init__(self):
        # If modifying these scopes, delete the file token.json.
        self._SCOPES = "https://www.googleapis.com/auth/gmail.readonly"

    def connect_gmail(self):
        store = file.Storage("token.json")
        creds = store.get()
        if not creds or creds.invalid:
            flow = client.flow_from_clientsecrets("credentials.json", self._SCOPES)
            creds = tools.run_flow(flow, store)
        service = build("gmail", "v1", http=creds.authorize(Http()))

        return service

pip install --upgrade google-api-python-client google-auth-httplib2 google-auth-oauthlib

pip install --upgrade oauth2client --ignore-installed six

poetry add gmail

Using version ^0.6.3 for gmail

Updating dependencies
Resolving dependencies... (0.6s)

Writing lock file


Package operations: 1 install, 0 updates, 0 removals

  - Installing gmail (0.6.3)

poetry add oauth2client

Using version ^4.1.3 for oauth2client

Updating dependencies
Resolving dependencies... (0.4s)

Writing lock file


Package operations: 7 installs, 0 updates, 0 removals

  - Installing pyasn1 (0.4.8)
  - Installing pyparsing (2.4.7)
  - Installing httplib2 (0.19.1)
  - Installing pyasn1-modules (0.2.8)
  - Installing rsa (4.7.2)
  - Installing six (1.15.0)
  - Installing oauth2client (4.1.3)

import imaplib
import email
from oauth2client.service_account import ServiceAccountCredentials
from email.message import EmailMessage

host = 'imap.gmail.com'
username = 'xxxxxxxxx@gmail.com'
password = 'xxxxxxxxxxxxx'


def get_inbox():
    mail = imaplib.IMAP4_SSL(host)
    mail.login(username, password)
    mail.select('inbox')
    _, search_data = mail.search(None, 'UNSEEN')
    my_message = []

    for num in search_data[0].split():
        email_data = {}
        _, data = mail.fetch(num, '(RFC822)')
        # print(data[0])
        _, b = data[0]
        email_message = email.message_from_bytes(b)
        #email_message = email.message_from_string(b)
        for header in ['subject', 'to', 'from','date']:
            print("{}:{}".format(header, email_message[header]))
            email_data[header] = email_message[header]
        # print(email_message)
        for part in email_message.walk():
            if part.get_content_type() == 'text/plain':
                body = part.get_payload(decode=True)
                email_data['body'] = body.decode()
            elif part.get_content_type() == 'text/html':
                html_body = part.get_payload(decode=True)
                email_data['html_body'] = html_body.decode()
        my_message.append(email_data)
    return my_message

if __name__ == '__main__':
    my_inbox = get_inbox()
    print(my_inbox)

host = 'imap.gmail.com'
username = 'xxxxxxxxx@gmail.com'
password = 'xxxxxxxxxxxxx'

def get_inbox():
    mail = imaplib.IMAP4_SSL(host)
    mail.login(username, password)
    mail.select('inbox')
    _, search_data = mail.search(None, 'UNSEEN')
    my_message = []

subject:Hello world
to:xxxxxxxx@gmail.com
from:=xxxxxxxxxxxxxxxx= <xxxxxxxx@gmail.com>
date:Thu, 1 Apr 2021 11:30:59 +0900
[{'subject': 'Hello world', 'to': 'xxxxxxxx@gmail.com', 'from': '=xxxxxxxxxxxxxxxx= <xxxxxxxx@gmail.com>', 'date': 'Thu, 1 Apr 2021 11:30:59 +0900', 'body': 'Hello xxxxxxxx,\r\nThank you for joining cfe.sh. We are very happy to have you with us.\r\n', 'html_body': '<div dir="ltr">Hello xxxxxxxx,<br>Thank you for joining cfe.sh. We are very happy to have you with us.<br></div>\r\n'}]