擅长:python、mysql、java
<p>像这样的东西怎么样:</p>
<pre><code>df = pd.DataFrame(index = pd.concat([df1, df2])["Index"].unique(), columns = ["Index1", "Index2"])
df["Index1"] = df1.set_index("Index", drop = False)
df["Index2"] = df2.set_index("Index", drop = False)
df.sort_index().reset_index(drop = True)
# Index1 Index2
#0 a a
#1 b b
#2 c NaN
#3 d NaN
#4 NaN e
#5 NaN f
#6 g g
#7 h h
</code></pre>