In Python, use Isinstance () to determine the variable type

First, Isinstance ()

In Python, you can use the type () and isinstance () functions to determine the object type, while the isinstance () function is more convenient to use than type.
Copy the Code code as follows:

# Coding=utf-8

A = 10

def b ():
Pass

Print Isinstance (A, (INT,STR))
Print Isinstance (A, (FLOAT,STR))
Print isinstance (b, (Str,int))

Class C:
Pass

obj = C ()

Print isinstance (obj, (c,int))

Execution Result:
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True
False
False
True

Ii. the difference between isinstance and type

The difference between isinstance and type is:
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Class A:
Pass

Class B (A):
Pass

Isinstance (A (), a) # returns True
Type (A ()) = = a # returns True
Isinstance (B (), A) # returns True
Type (B ()) = = A # returns False

The difference is that the type of subclass is not available, so it is strongly recommended that you do not use type to determine object types.

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