How to convert list to string?

Question

Python

You need to convert list to a string.

for row in data_body:
  print(row)
  data = ','.join(row)

However, the following error is thrown. I can't figure out why:

[None, u'1516482864.000000', 627, 0, u'9227943', 41, 60.0, u'transaction', u'[phone]', u'5000.00', u'345188435', 472, 1463, u'2018-01-20 21:12:19.019598', u'6be2d345dd43af6fc23', 6225064, u'222222222']
Traceback (most recent call last):
  File "app.py", line 72, in <module>
    data = ','.join(row)
TypeError: sequence item 0: expected string, NoneType found

Answer 1

data = ','.join(str(i) for i in row)
if None should be removed

data = ','.join(str(i) for i in row if i is not None)