擅长:python、mysql、java
<p>这里有一些简单易懂的东西。在</p>
<pre><code>import pandas as pd
df = [[10,100,99],[20,280,300],[30,680,700] ]
df = pd.DataFrame(df, columns = ['strike_price', 'ask','bid'])
df = df.set_index('strike_price')
new_bid = []
x = 0
for index, row in df.iterrows():
y = row['bid']
new_bid.append(y-x)
x = row['ask']
df['Final'] = new_bid
print(df)
</code></pre>
<p>这里假设ask最初为0</p>
^{pr2}$