#+BEGIN_SRC python :results raw
import pandas as pd
import numpy as np
from tabulate import tabulate

df = pd.DataFrame(np.random.random((4,3)), columns=['A','B','C'])
print("foo")
return(tabulate(df, headers="keys", tablefmt="orgtbl"))
#+END_SRC

#+RESULTS:
|   |        A |        B |        C |
|---+----------+----------+----------|
| 0 | 0.754799 | 0.492722 | 0.144595 |
| 1 | 0.198475 | 0.417721 | 0.083459 |
| 2 | 0.645011 | 0.444857 | 0.278874 |
| 3 | 0.314883 |   0.7521 | 0.789418 |

And ~:session~ version:

#+BEGIN_SRC python :results raw :session foo
import pandas as pd
import numpy as np
from tabulate import tabulate

df = pd.DataFrame(np.random.random((4,3)), columns=['A','B','C'])
print("foo")
tabulate(df, headers="keys" ,headers="keys",tablefmt="orgtbl")
#+END_SRC

#+RESULTS:
|   |         A |         B |        C |
|---+-----------+-----------+----------|
| 0 |  0.732506 |  0.508531 | 0.651031 |
| 1 | 0.0187486 |  0.467498 | 0.391717 |
| 2 |  0.231897 | 0.0988542 | 0.170519 |
| 3 |  0.742887 |   0.10542 | 0.271825 |