weird result trying to remove numbers from a list

[perfringo]

I would approach it this way:

Take away ambiguity: 'number' is integer.

Make a plan. In spoken language: "give me items in list which are not integers".

Find the pieces:

- iterate over elements: use for-loop
- test whether element is integer: use built-in functions isinstance()
- wrap it into list comprehension

>>> lst = [1, 'one', 2, 'two']
>>> no_ints = [item for item in lst if not isinstance(item, int)]
>>> no_ints
['one', 'two'] 

EDIT: if 'number' is both integers and floats then element testing should be isinstance(item, (int, float))