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Python: issubclass() function

issubclass() function

The issubclass() function returns true if the specified object is a subclass of the specified object, otherwise false. A class is considered a subclass of itself.

Version:

(Python 3.2.5)

Syntax:

issubclass(class, classinfo)

Parameter:

Name Description Required /
Optional
class An object to be checked. Required
classinfo classinfo may be a tuple of class objects, in which case every entry in classinfo will be checked. In any other case, a TypeError exception is raised. Required

Example: Python issubclass() function

class Square:
  def __init__(SquareType):
    print('Square is a ', SquareType)

class Rectangle(Square):
  def __init__(self):
    Square.__init__('Rectangle')
    
print(issubclass(Rectangle, Square))
print(issubclass(Rectangle, list))
print(issubclass(Rectangle, (list, Square)))
print(issubclass(Square, (list, Square)))

Output:

True
False
True
True

Python Code Editor:

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Python: Tips of the Day

How do I check if a list is empty?

For example, if passed the following:

a = []
if not a:
  print("List is empty")

Ref: https://bit.ly/2A4JXx9