【python primary 】hasattr Function to determine whether an object contains an attribute

• 1、 background
• 2、 grammar
• 3、 Example

1、 background

hasattr The function is python Built in functions for , similar print The function is the same .
hasattr Function is used to determine whether the object contains the corresponding properties .

among builtins.py The script is about hasattr The function is described as follows ：

def hasattr(*args, **kwargs): # real signature unknown
"""
Return whether the object has an attribute with the given name.
This is done by calling getattr(obj, name) and catching AttributeError.
"""
pass

2、 grammar

hasattr(object, name)
among ：
object – object .
name – Property name string .

Return value ：
If the object has this property returned True, Otherwise return to False.

3、 Example

Check whether the image array has shape attribute .

# encoding: utf-8
import cv2
image=cv2.imread("./2.jpeg")
if hasattr(image,"shape"):
print("[INFO] The shape of the image ：{0}".format(image.shape))

Run the following ：