擅长:python、mysql、java
<p>如果您不想使用正则表达式,我建议您只使用<a href="https://docs.python.org/3/library/stdtypes.html#str.isdigit" rel="nofollow noreferrer">^{<cd1>}</a></p>
<pre><code>user_input = input('>>>: ')
if not user_input.isdigit():
print('That wasn\'t an integer.')
else:
print('That was an integer!')
</code></pre>
<p>还有一种方法</p>
<pre><code>try:
user_input = int(input('>>>: '))
print('That was an integer!')
except ValueError:
print('That wasn\'t an integer.')
</code></pre>