How can I select only integers from list and not booleans?
Question:
I have a code to get only integers from a list:
list = [i for i in list if isinstance(i, int)]
However, if the list is [True, 19, 19.5, False], it will return [True, 19, False]. I need it to return only [19], not the True and False. How do I do that?
Answers:
As mentioned in the comment, True/False values are also the instances of int in Python, so you can add one more condition to check if the value is not an instance of bool:
>>> lst = [True, 19, 19.5, False]
>>> [x for x in lst if isinstance(x, int) and not isinstance(x, bool)]
[19]
bool is a subclass of int, therefore True is an instance of int.
False equal to 0True equal to 1
you can use another check or if type(i) is int
Use type comparison instead:
_list = [i for i in _list if type(i) is int]
Side note: avoid using list as the variable name since it’s the Python builtin name for the list type.
You could try using a conditional statement within your code that checks for isinstance(i, int) and only appends i to the list if that condition is True.
I have a code to get only integers from a list:
list = [i for i in list if isinstance(i, int)]
However, if the list is [True, 19, 19.5, False], it will return [True, 19, False]. I need it to return only [19], not the True and False. How do I do that?
As mentioned in the comment, True/False values are also the instances of int in Python, so you can add one more condition to check if the value is not an instance of bool:
>>> lst = [True, 19, 19.5, False]
>>> [x for x in lst if isinstance(x, int) and not isinstance(x, bool)]
[19]
bool is a subclass of int, therefore True is an instance of int.
Falseequal to0Trueequal to1
you can use another check or if type(i) is int
Use type comparison instead:
_list = [i for i in _list if type(i) is int]
Side note: avoid using list as the variable name since it’s the Python builtin name for the list type.
You could try using a conditional statement within your code that checks for isinstance(i, int) and only appends i to the list if that condition is True.