变量数据类型错误？

我上课，目的是从Git提交中获取用户名和他的电子邮件：

class BitbucketData(object):

    def get_user_name(self):

        proc = subprocess.Popen("git --no-pager show -s --format='%an'", stdout=subprocess.PIPE)
        committer_name = proc.stdout.read()

        if committer_name:
            return committer_name

    def get_user_email(self):

        proc = subprocess.Popen("git --no-pager show -s --format='%aE'", stdout=subprocess.PIPE)
        committer_email = proc.stdout.read()

        if committer_email:
            return committer_email

它使用，那么发送通知用户（底部工作版本-没有变量-所有sender与receiver数据集明确，不变量-他们在这里评论）：

class Services(object):


    def sendmail(self, event):

        repo = BitbucketData()

        #to_address = repo.get_user_email()
        #to_address = '[email protected]'
        #to_name = repo.get_user_name()
        #to_name = 'Test user'

        subject = 'Bamboo build and deploy ready'
        sender = 'Bamboo agent <[email protected]>'

        text_subtype = 'plain'
        message = """
        Hello, {}.

        Your build ready.
        Link to scenario: URL
        Link to build and deploy results: {})

        """.format('Test user', os.environ['bamboo_resultsUrl'])

        msg = MIMEText(message, text_subtype)
        msg['Subject'] = subject
        msg['From'] = sender
        msg['To'] = 'Test user <[email protected]>'

        smtpconnect = smtplib.SMTP('outlook.office365.com', 587)
        smtpconnect.set_debuglevel(1)
        smtpconnect.starttls()
        smtpconnect.login('[email protected]', 'password')
        smtpconnect.sendmail('[email protected]', '[email protected]', msg.as_string())
        smtpconnect.quit()

        print('Mail sent')

        print(repo.get_user_email())

问题是-如果我正在使用变量中的数据（例如，to_address = '[email protected]'或将BitbucketData()类与to_address = repo.get_user_email()-一起使用）-我收到了Office365服务器的错误消息：

...
reply: '250 2.1.0 Sender OK\r\n'
reply: retcode (250); Msg: 2.1.0 Sender OK
send: "rcpt TO:<'[email protected]'>\r\n"
reply: '501 5.1.3 Invalid address\r\n'
reply: retcode (501); Msg: 5.1.3 Invalid address
...
  File "C:\Python27\lib\smtplib.py", line 742, in sendmail
    raise SMTPRecipientsRefused(senderrs)
smtplib.SMTPRecipientsRefused: {"'[email protected]'\n": (501, '5.1.3 Invalid address')}

使用变量时，代码如下所示：

class Services(object):


    def sendmail(self, event):

        repo = BitbucketData()

        to_address = repo.get_user_email()
        #to_address = '[email protected]'
        to_name = repo.get_user_name()
        #to_name = 'Test user'
        from_address = '[email protected]'

        subject = 'Bamboo build and deploy ready'
        sender = 'Bamboo agent <[email protected]>'

        text_subtype = 'plain'
        message = """
        Hello, {}.

        Your build ready.
        Link to scenario: URL
        Link to build and deploy results: {})

        """.format(to_name, os.environ['bamboo_resultsUrl'])

        msg = MIMEText(message, text_subtype)
        msg['Subject'] = subject
        msg['From'] = sender
        msg['To'] = to_name

        smtpconnect = smtplib.SMTP('outlook.office365.com', 587)
        smtpconnect.set_debuglevel(1)
        smtpconnect.starttls()
        smtpconnect.login('[email protected]', 'password')
        smtpconnect.sendmail(from_address, to_address, msg.as_string())
        smtpconnect.quit()

        print('Mail sent')

        print(repo.get_user_email())

我在这里（或Microsoft SMTP ...）做错了什么？

UPD

def sendmail(self, event):

    repo = BitbucketData()
    print(repr(repo.get_user_email()))
    ...

给我：

...
Creating new AutoEnv config
"'[email protected]'\n"
send: 'ehlo pc-user.kyiv.domain.net\r\n'
...