擅长:python、mysql、java
<p>早期代码中的一些更改。在这里,您可以保存<strong>Grades</strong>列而不会出现任何错误</p>
<pre><code>import pandas as pd
filenm = 'marks.csv'
def mark_to_score(marks):
" Converts a mark to a grade "
if marks > 80:
return "Distinguished"
elif 50 <= marks < 80:
return "First Class"
elif 35 <= marks < 50:
return "Second Class"
else:
return "Failed"
df = pd.read_csv(filenm)
df['Grades'] = df['Marks'].apply(mark_to_score)
df.to.csv(filenm, sep='\t')
</code></pre>