如何使用Gmail Python API获取电子邮件发件人的电子邮件地址

使用GoogleAPI python客户端，我想查找电子邮件发件人的电子邮件地址/名称。 到目前为止，我已经提取了有关该消息的详细信息，但我很难找到提取查找者信息的方法

以下是代码片段：

from __future__ import print_function
import httplib2
import os

from apiclient import discovery
from oauth2client import client
from oauth2client import tools
from oauth2client.file import Storage

try:
    import argparse
    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
    flags = None

# If modifying these scopes, delete your previously saved credentials
# at ~/.credentials/gmail-python-quickstart.json
SCOPES = 'https://www.googleapis.com/auth/gmail.readonly'
CLIENT_SECRET_FILE = 'client_secret.json'
APPLICATION_NAME = 'Gmail API Python Quickstart'


def get_credentials():
    """Gets valid user credentials from storage.

    If nothing has been stored, or if the stored credentials are invalid,
    the OAuth2 flow is completed to obtain the new credentials.

    Returns:
        Credentials, the obtained credential.
    """
    home_dir = os.path.expanduser('~')
    credential_dir = os.path.join(home_dir, '.credentials')
    if not os.path.exists(credential_dir):
        os.makedirs(credential_dir)
    credential_path = os.path.join(credential_dir,
                                   'gmail-python-quickstart.json')

    store = Storage(credential_path)
    credentials = store.get()
    if not credentials or credentials.invalid:
        flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
        flow.user_agent = APPLICATION_NAME
        if flags:
            credentials = tools.run_flow(flow, store, flags)
        else: # Needed only for compatibility with Python 2.6
            credentials = tools.run(flow, store)
        print('Storing credentials to ' + credential_path)
    return credentials

def main():
    """Shows basic usage of the Gmail API.

    Creates a Gmail API service object and outputs a list of label names
    of the user's Gmail account.
    """
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('gmail', 'v1', http=http)

    results = service.users().messages().list(userId='me').execute()
    messages = results['messages']

    mail = service.users().messages().get(userId='me', id=messages[0]['id'], format='minimal').execute()
    # I have other formats(RAW, METADATA and FULL) but I cannot parse them.
    print(mail)

if __name__ == '__main__':
    main()

metadata = mail['payload']['headers'] 
# This list contains information about To, From and Subject among other gibberish.

for d in metadata:

    # for sender's information
    if d['name'] == 'From':
        print(d['value'])

    # for subject of the mail
    if d['name'] == 'Subject':
        print(d['value'])

---

我正在寻找某种方法（内置或第三方库）来解析API返回的电子邮件对象，以返回更可读的信息。一些特别的方法暂时也可以使用。

我找到了一种特别的方法来提取电子邮件的基本信息

以下是片段：

from __future__ import print_function
import httplib2
import os

from apiclient import discovery
from oauth2client import client
from oauth2client import tools
from oauth2client.file import Storage

try:
    import argparse
    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
    flags = None

# If modifying these scopes, delete your previously saved credentials
# at ~/.credentials/gmail-python-quickstart.json
SCOPES = 'https://www.googleapis.com/auth/gmail.readonly'
CLIENT_SECRET_FILE = 'client_secret.json'
APPLICATION_NAME = 'Gmail API Python Quickstart'


def get_credentials():
    """Gets valid user credentials from storage.

    If nothing has been stored, or if the stored credentials are invalid,
    the OAuth2 flow is completed to obtain the new credentials.

    Returns:
        Credentials, the obtained credential.
    """
    home_dir = os.path.expanduser('~')
    credential_dir = os.path.join(home_dir, '.credentials')
    if not os.path.exists(credential_dir):
        os.makedirs(credential_dir)
    credential_path = os.path.join(credential_dir,
                                   'gmail-python-quickstart.json')

    store = Storage(credential_path)
    credentials = store.get()
    if not credentials or credentials.invalid:
        flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
        flow.user_agent = APPLICATION_NAME
        if flags:
            credentials = tools.run_flow(flow, store, flags)
        else: # Needed only for compatibility with Python 2.6
            credentials = tools.run(flow, store)
        print('Storing credentials to ' + credential_path)
    return credentials

def main():
    """Shows basic usage of the Gmail API.

    Creates a Gmail API service object and outputs a list of label names
    of the user's Gmail account.
    """
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('gmail', 'v1', http=http)

    results = service.users().messages().list(userId='me').execute()
    messages = results['messages']

    mail = service.users().messages().get(userId='me', id=messages[0]['id'], format='minimal').execute()
    # I have other formats(RAW, METADATA and FULL) but I cannot parse them.
    print(mail)

if __name__ == '__main__':
    main()

metadata = mail['payload']['headers'] 
# This list contains information about To, From and Subject among other gibberish.

for d in metadata:

    # for sender's information
    if d['name'] == 'From':
        print(d['value'])

    # for subject of the mail
    if d['name'] == 'Subject':
        print(d['value'])