List items verification for Integer type

[perfringo]

One way (which does not require to define possible classes in chain of if-s) is to use defaultdict and class name:

>>> import collections
>>> lst = ['abc', 1, 2, 3, 4.3, [42]] 
>>> types = collections.defaultdict(list)
>>> for item in lst: 
...     types[type(item).__name__].append(item)
...
>>> types
defaultdict(list, {'str': ['abc'], 'int': [1, 2, 3], 'float': [4.3], 'list': [[42]]})
>>> for k, v in types.items(): 
...     print(f'{k} --> {v}') 
...                                                                 
str --> ['abc']
int --> [1, 2, 3]
float --> [4.3]
list --> [[42]]
>>> types['int']                                                    
[1, 2, 3]