Python 一次附加多个熊猫数据框

Append multiple pandas data frames at once

提问by user3664020

I am trying to find some way of appending multiple pandas data frames at once rather than appending them one by one using

我试图找到某种方式一次附加多个熊猫数据帧，而不是使用

df.append(df)

Let us say there are 5 pandas data frames t1, t2, t3, t4, t5. How do I append them at once? Something equivalent of

假设有 5 个 Pandas 数据框t1, t2, t3, t4, t5。我如何一次附加它们？相当于

df = rbind(t1,t2,t3,t4,t5)

采纳答案by tfv

Have you simply tried using a list as argument of append? Or am I missing anything?

您是否只是尝试使用列表作为 append 的参数？还是我错过了什么？

import numpy as np
import pandas as pd

dates = np.asarray(pd.date_range('1/1/2000', periods=8))
df1 = pd.DataFrame(np.random.randn(8, 4), index=dates, columns=['A', 'B', 'C', 'D'])
df2 = df1.copy()
df3 = df1.copy()
df = df1.append([df2, df3])

print df

回答by jezrael

I think you can use concat:

我认为你可以使用concat：

print pd.concat([t1, t2, t3, t4, t5])

Maybe you can ignore_index:

也许你可以ignore_index：

print pd.concat([t1, t2, t3, t4, t5], ignore_index=True)

More info in docs.

文档中的更多信息。