擅长:python、mysql、java
<p>使用<code>isdigit</code></p>
<pre><code>data = {
'1': {'Name': 'Katherine Watson',
'Age': '1',
'Height': '150'},
'2': {'Name': 'Emilia Li',
'Age': '56',
'Height': '175'},
'3': {'Name': 'Dorothy Johnson',
'Age': '29',
'Height': '162'},
'4': {'Name': 'Alexandar Knight',
'Age': '14',
'Height': '164r'}
}
def person_height(height):
if height.isdigit():
return height
for some_id, info in data.items():
print("\nID:", some_id)
print("Height:", person_height(info['Height']))
</code></pre>
<p>输出:</p>
<pre><code>ID: 1
Height: 150
ID: 2
Height: 175
ID: 3
Height: 162
ID: 4
Height: None
</code></pre>