But you never encounter type errors in real life!

gistfile1.txt

2018-02-12 14:14:36,825:ERROR:root:'dict' object does not support indexing
Traceback (most recent call last):
  File "/home/superset/venv/lib/python3.5/site-packages/superset/connectors/sqla/models.py", line 568, in query
    try:
  File "/home/superset/venv/lib/python3.5/site-packages/superset/models/core.py", line 612, in get_df
  File "/home/superset/venv/lib/python3.5/site-packages/pandas/io/sql.py", line 416, in read_sql
    chunksize=chunksize)
  File "/home/superset/venv/lib/python3.5/site-packages/pandas/io/sql.py", line 1087, in read_query
    result = self.execute(*args)
  File "/home/superset/venv/lib/python3.5/site-packages/pandas/io/sql.py", line 978, in execute
    return self.connectable.execute(*args, **kwargs)
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 2064, in execute
    return connection.execute(statement, *multiparams, **params)
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 939, in execute
    return self._execute_text(object, multiparams, params)
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1097, in _execute_text
    statement, parameters
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1189, in _execute_context
    context)
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1405, in _handle_dbapi_exception
    util.reraise(*exc_info)
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/util/compat.py", line 187, in reraise
    raise value
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1182, in _execute_context
    context)
  File "/home/superset/venv/lib/python3.5/site-packages/sqlalchemy/engine/default.py", line 470, in do_execute
    cursor.execute(statement, parameters)
TypeError: 'dict' object does not support indexing