Why is pandas.DataFrame.apply printing out junk?

Question

Consider this simple dataframe:

   a  b
0  1  2
1  2  3

I perform a .apply as such:

In [4]: df.apply(lambda x:         


        

Answer 1

It looks like bug, so was opened Issue 17487.

For me working add tolist:

print (df.apply(lambda x: [x.values.tolist()]))
a    [[1, 2]]
b    [[2, 3]]
dtype: object

---

print (df.apply(lambda x: [list(x.values)]))
a    [[1, 2]]
b    [[2, 3]]
dtype: object