ValueError: cannot copy sequence with size 5 to array axis with dimension 2

Question

using numpy 1.7.1 the below code works and produces the result as shown,

import pandas as pd
import numpy as np
d1 = pd.DataFrame({\'Name\': [1, 1, 1, 1, 1],         


        

Answer 1

I was able to reproduce your issue with numpy 1.9.2. It seems that numpy is trying to do a vstack. when the shape are same. I tried the following approach and it worked.

result = np.empty(2, dtype=object)
result[:]= [d1, d2]

result
array([    Name  number
0     1       1
1     1       1
2     1       1
3     1       1
4     1       1,
          Name  number
0     1       1
1     1       1
2     1       1
3     1       1
4     1       1], dtype=object)