擅长:python、mysql、java
<pre><code>import pandas as pd
with open('textfile.txt') as f:
df = pd.read_csv(f, header=None, sep=' ')
df = df.drop(3, 1) # 3 = column name, 1 indicates columns
df[2] = df[2] * 10
df.to_csv(r'output.txt', header=None, index=None, sep=' ', mode='a')
</code></pre>