string indices must be integers

[buran]

There are a few strings in a list. But it is interesting, why I can print it without any problems.

Because if element is a string, you cannot access it like with dict key, you can use int indexes though:

>>> element = 'some string'
>>> element['sentencies']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: string indices must be integers
>>> element[0]
's'
>>> element[3:]
'e string'
>>>

---

data is the dictionary.

Nope, data is list, but as it turns out elements are of mixed type - dicts and strings