连接表列表中的列

如何解决连接表列表中的列

我使用 Tabula 抓取了这个 PDF，并使用以下代码创建了一个包含 multiple_tables=True 的 (1410) 表列表：

from tabula import read_pdf
df = read_pdf("~/Google Drive/DATA/978-1-912036-41-7-Who Owns Whom UK-Ireland-Volume-1.pdf",stream=True,pages='19-1428',guess=False,pandas_options={'header': None},encoding = 'ISO-8859-1',multiple_tables=True,columns=[210,400],area=[60,30,835,1000])

示例第一个表：

df[0000]
                                                     0  ...                                              2
0                                                  NaN  ...             . Contrarian Group Limited England
1                                                  NaN  ...     . Cornerstone Study Abroad Limited England
2                                                    ?  ...                    . Crudolife Limited England
3                                                  NaN  ...  . Crystal Palace Physio Group Limited England
4                                                  NaN  ...               . Daniels London Limited England
..                                                 ...  ...                                            ...
140                 . . Kharis Catering C.I.C. England  ...         . Pivotal Technologies Limited England
141                            . . Kvm Limited England  ...                   . Plus Black Limited England
142                 . . London College Limited England  ...                   . Plus Tyres Limited England
143  . . London College of Accounting & Finance Lim...  ...                    . Portaplay Limited England
144                . .Millfield & Partners Ltd England  ...                 . Portaplaypen Limited England
[145 rows x 3 columns]

问题

如何首先将每个表中的三列串联（一个在另一个之上）以获得一个单列，然后将 1410 个表串联成一个表？

我设法遍历表列表并打印一列，但我无法将结果放入数据框：

import numpy as np
import panda as pd
for x,res in enumerate(df):
    print(np.ravel(res)[None].T)

我试过了：

for x,res in enumerate(df):
    v = np.ravel(res)[None].T
    result = pd.DataFrame(x,":",v,columns=['t'])