擅长:python、mysql、java
<p>愚蠢的做法</p>
<pre><code>from itertools import product
import pandas as pd
import numpy as np
def pir(df):
ub = pd.Index(np.unique(df.values[:, 0]), name='bowl')
uc = pd.Index(np.unique(df.values[:, 1]), name='cookie')
u = np.array(list(product(ub.values, uc.values)))
e = u[:, None] == df.values
return pd.DataFrame(
e.all(2).sum(1).reshape(-1, 2),
ub, uc
)
pir(df)
</code></pre>
<p><a href="https://i.stack.imgur.com/lqXNc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lqXNc.png" alt="enter image description here"/></a></p>