Python: isinstance() function

 Python Booleans (w3schools.com)

Python also has many built-in functions that return a boolean value, like the isinstance() function, which can be used to determine if an object is of a certain data type:

Example

Check if an object is an integer or not:

x = 200
print(isinstance(x, int))

Không có nhận xét nào:

Check to be sure that port 22 is enabled before you reload

 https://superuser.com/questions/590600/ufw-is-active-but-not-enabled-why etting  ENABLED=yes  in  /etc/ufw/ufw.conf  did it for me. $ sudo ...