<p>使用<a href="https://docs.scipy.org/doc/numpy-1.14.0/reference/generated/numpy.union1d.html" rel="nofollow noreferrer">^{<cd1>}</a>:</p>
<pre><code>val = np.union1d(users['first_name'], users['last_name'])
users['uses_name'] = users['password'].isin(val)
print (users)
id user_name password first_name last_name uses_name
0 1 vance.jennings joobheco vance jennings False
1 2 consuelo.eaton 0869347314 consuelo eaton False
2 3 mitchel.perkins fabypotter mitchel perkins False
3 4 odessa.vaughan aharney88 odessa vaughan False
2 3 mitchel.perkins fabypotter mitchel perkins False
3 4 odessa.vaughan aharney88 odessa vaughan False
4 5 araceli.wilder acecdn3000 araceli wilder False
5 6 shawn.harrington 5278049 shawn harrington False
6 7 evelyn.gay master evelyn gay False
7 8 noreen.hale murphy noreen hale False
8 9 gladys.ward lwsves2 gladys ward False
9 10 brant.zimmerman 1190KAREN5572497 brant zimmerman False
10 11 leanna.abbott aivlys24 leanna abbott False
11 12 milford.hubbard hubbard milford hubbard True
</code></pre>