write to excel will be empty in column

[Larz60+]

one thing I notice immediately that will get you in trouble:
never name a list list.
that overwrites python's list
example:

>>> z = ('a','b','c')
>>> # following is legal
>>> zz = list(z)
>>> zz
['a', 'b', 'c']
>>> # following is taboo
>>> list = [1,2,3]
>>> z = ('a','b','c')
>>> zz = list(z)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'list' object is not callable
>>>