This is the 10th day of my participation in the November Gwen Challenge. Check out the event details: The last Gwen Challenge 2021

To determine whether a variable is a data type, you can use either isinstance() or type().

type()

class type(name, bases, dict,  **kwds)

• Returns when passed a parameterobjectThe type of. The return value is a Type object, usually the same asobject.__class__The same object is returned.
• When three arguments are passed, a new Type object is returned.(No, don’t look)
  • nameThe string is the class name and will become__name__attribute;
  • basesTuples contain base classes and become__bases__Properties; If empty, the ultimate base class for all classes is addedobject.
  • dictThe dictionary contains the attributes and method definitions of the class body; It became a__dict__Attributes may have been copied or wrapped previously.

Use it to determine the data type:

s = 'hello world'

print(type(s) == str)
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>> 
True
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isinstance()

isinstance(object, classinfo)

• ifobjectThe parameter isclassinfoAn instance of a parameter, or its (directly, indirectly, orvirtual), returns an instance of a subclassTrue. ifobjectObjects that are not of the given type are always returnedFalse.
• ifclassinfoIs a tuple of an object of type (or generated recursively by that tuple) or more typesThe union type, then whenobjectIs returned when it is an instance of any of these typesTrue. ifclassinfoIs not a type or type tuple, will fireTypeErrorThe exception.

s = 'hello world'

print(isinstance(s,str))
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>> 
True
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s = 'hello world'

print(isinstance(s,(str.int.float)))
print(isinstance(s,(bool.int.float)))
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>> 
True
False
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class F:
    def __init__(self) :
        pass
class S(F) :
    def __init__(self) :
        pass


print(isinstance(F(), F))
print(type(F()) == F)
print(isinstance(S(), F))
print(type(S()) == F)
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True
True
True
False
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