TypeError: tuple indices must be integers or slices, not str

[jensenity]

[2018-06-19 11:44:18,462] {models.py:1595} ERROR - tuple indices must be integers or slices, not str
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/airflow/models.py", line 1488, in _run_raw_task
result = task_copy.execute(context=context)
File "/usr/local/airflow/dags/productdata/ops/mysql_to_s3_operator.py", line 86, in execute
self.get_schema(hook, self.mysql_table)
File "/usr/local/airflow/dags/productdata/ops/mysql_to_s3_operator.py", line 94, in get_schema
new_dict['name']=i['COLUMN_NAME']
TypeError: tuple indices must be integers or slices, not str

There's an error if the tuple is a str.

When I change it to
[As-Is]

new_dict['name']=i['COLUMN_NAME']

new_dict['type']=i['COLUMN_TYPE']

[To-Be]
new_dict['name']=i[0] # COLUMN_NAME
new_dict['type']=i[1] # COLUMN_TYPE

No more error is shown.