擅长:python、mysql、java
<p>您的代码是正确的,但您必须将结果分配回变量以获得所需的输出</p>
<pre><code>df_smer_orig = pd.read_csv('sample.csv', engine='python')
df_smer = df_smer_orig['Item'].tolist()
df_smer = [x.lower() for x in df_smer]
for x in df_smer:
print(x)
regex = re.compile('[^a-zA-Z]')
x = regex.sub('', x)
print(x)
print(df_smer)
</code></pre>