PROSAGA码农传奇-Jira-赋值前引用的局部变量X.

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  <P>
    
您可以通过在try块中包含return来实现所需的行为：
  </p>
   <pre class="lang-py prettyprint-override">
    <code>
      def jira_connect(User, Passwd):
    try:
        jira = JIRA(basic_auth=(User, Passwd), options={'server': 'https://jira-server-address'})
        return jira
    except JIRAError as e:
        if e.status_code == 401:
            print "Login to JIRA failed. Please check your username and password and try again !"
            exit()

</code>
  </pre>
  <P>
    否则，如果遇到异常，则为本地var
     <code>
      jira
    </code>
     在返回时未分配。
  </p>
  <P>
    否则你可以分配，例如，
     <code>
      jira = None
    </code>
     在except块中：
  </p>
   <pre class="lang-py prettyprint-override">
    <code>
      def jira_connect(User, Passwd):
    try:
        jira = JIRA(basic_auth=(User, Passwd), options={'server': 'https://jira-server-address'})
    except JIRAError as e:
        if e.status_code == 401:
            print "Login to JIRA failed. Please check your username and password and try again !"
            exit()
        jira = None
    return jira

</code>
  </pre>
  <P>
    但如果是的话，我会对此保持警惕
     <code>
      JIRAError
    </code>
     状态代码与401不同导致a
     <code>
      None
    </code>
     返回，稍后脚本中的代码依赖于有效连接。根据这个，你可能想要把
     <code>
      exit()
    </code>
     调用if语句之外的except块。
  </p>
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