擅长:python、mysql、java
<pre><code>restart = input("Would you like to use the calculator again?\n1: Yes, 2: No\n")
if restart == "1":
begin()
else:
print("Thank you for using the calculator!")
</code></pre>
<p>问题是您正在将<code>print(input(...))</code>分配给<code>restart</code>,即<code>NoneType</code></p>