小编Dav*_*vid的帖子

我一直在我的桌子上撞到这个,无法弄清楚是否有办法,也许我正在尝试一些不可能的事情.

我有两个DataFrames,包含MultiIndex列(三个级别)和时间索引(单个级别).第一个是这样的:

border           a-b                 c-d
from               a         b         c
to                 b         a         d
2009-03-01 -0.778346 -0.928997       NaN
2009-03-02 -1.352559  1.247335       NaN
2009-03-03 -0.967939  0.432638       NaN
2009-03-04  0.786094 -2.209559       NaN
2009-03-05 -0.001338  1.084152       NaN
2009-03-06  1.163334       NaN       NaN
2009-03-07 -0.587593       NaN       NaN
2009-03-08  0.118469       NaN       NaN
2009-03-09       NaN       NaN -1.272959
2009-03-10       NaN       NaN -1.207129
2009-03-11       NaN       NaN  0.244019

对于这个DF,我想添加以下内容:

border           a-b
from               a
to                 b
2009-03-09  1.243296
2009-03-10 -0.049870
2009-03-11  1.599999

考虑行和列索引.结果应该是:

border           a-b                 c-d
from               a         b         c
to                 b …

最奇怪的事情正在发生。我正在使用 Python 2.7 32 位中的 pypyodbc 和 pandas.io.sql 连接到 Access DB。以下代码与漂亮的任何表名 (table_name) 完美配合：

var = psql.read_sql("SELECT * FROM table_name;",conn)

除了名为Currency的表。我什至可以调用表Currenc并且代码有效，没问题。一旦我在最后添加y，我就会得到：

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\pandas\io\sql.py", line 421, in read_sql
coerce_float=coerce_float, parse_dates=parse_dates)
File "C:\Python27\lib\site-packages\pandas\io\sql.py", line 1046, in read_sql
cursor = self.execute(*args)
File "C:\Python27\lib\site-packages\pandas\io\sql.py", line 1041, in execute
raise_with_traceback(ex)
File "C:\Python27\lib\site-packages\pandas\io\sql.py", line 1030, in execute
cur.execute(*args)
File "C:\Python27\lib\site-packages\pypyodbc.py", line 1605, in execute
self.execdirect(query_string)
File "C:\Python27\lib\site-packages\pypyodbc.py", line 1631, in …