i am using the python tile in domo magic etl

i am trying to cast a column to a category

but when i try and read the dataframe to the write_dataframe i get an error

# Import the domomagic package into the script 

from domomagic import *

# read data from inputs into a data frame

raw = read_dataframe('Source 2')

#print('Before Cast')

#print(raw.dtypes)

#cast to correct dtypes to save space

raw = raw.astype({'VEEVA Entity ID': 'category'}, errors='raise') 

print(type(raw))

write_dataframe(raw)

The error i get is has anyone else had a similar issue. it seems like domo specific outside of domo in pure python the code works.

Traceback (most recent call last):
00:00:10.604   File "<stdin>", line 25, in <module>
00:00:10.606   File "/home/domo/domomagic/io.py", line 46, in write_dataframe
00:00:10.606     write_array_dict(d)
00:00:10.606   File "/home/domo/domomagic/io.py", line 59, in write_array_dict
00:00:10.606     raise ValueError('domomagic: Array dict values must be numpy.ndarrays')
00:00:10.606 ValueError: domomagic: Array dict values must be numpy.ndarrays