擅长:python、mysql、java
<p>函数将自动返回<code>None</code>,除非您编写了return语句。如果已经编写了<code>print</code>语句,则无需在类外再次编写print。只需调用该方法</p>
<pre><code>msg1.welcome_message()
msg1.on_process_message()
msg1.thank_you_message()
</code></pre>
<p>如果您想要一个return语句,那么在调用该方法时必须在类外编写print</p>
<p>编辑的代码将是:</p>
<pre><code>class GreetingMessage:
def welcome_message(self):
return "you are welcome to python"
def thank_you_message(self):
return "Ok Bye Thank You"
def on_process_message(self):
return "process is on progress"
msg1 = GreetingMessage()
print(msg1.welcome_message())
print(msg1.on_process_message())
print(msg1.thank_you_message())
</code></pre>