hasattr在python中的意思
时间: 2023-04-24 09:02:06 浏览: 163
`hasattr` 函数在 Python 中是用来检查一个对象是否具有特定的属性的。它的语法为 `hasattr(object, name)`,其中 `object` 是要检查的对象,`name` 是要检查的属性名称。如果对象具有该属性,则返回 `True`,否则返回 `False`。
相关问题
Python hasattr
在Python中,`hasattr()`是一个内置函数,用于检查对象是否拥有特定的属性或方法。它的语法通常是这样的:
```python
hasattr(object, name)
```
这里的`object`是你想要检查的对象,`name`是你要查找的属性名,可以是变量、函数、方法或特殊属性如`__class__`等。
这个函数会返回一个布尔值,如果对象有指定的属性,则返回`True`,否则返回`False`。例如:
```python
class MyClass:
def __init__(self):
self.my_attribute = 'Hello'
obj = MyClass()
print(hasattr(obj, 'my_attribute')) # 输出:True
print(hasattr(obj, 'non_existent_attribute')) # 输出:False
```
python hasattr
`hasattr()` is a built-in Python function that returns a boolean value indicating whether an object has a given attribute or not.
Syntax:
```
hasattr(object, attribute)
```
Parameters:
- `object`: The object to check for the attribute.
- `attribute`: A string representing the name of the attribute to check.
Return Value:
- `True`: If the object has the specified attribute.
- `False`: If the object does not have the specified attribute.
Example:
```
class MyClass:
def __init__(self):
self.my_attribute = "Hello, World!"
obj = MyClass()
# Check if obj has the attribute "my_attribute"
if hasattr(obj, "my_attribute"):
print(obj.my_attribute) # Output: "Hello, World!"
# Check if obj has the attribute "non_existing_attribute"
if hasattr(obj, "non_existing_attribute"):
print("This should not be printed")
else:
print("The attribute does not exist") # Output: "The attribute does not exist"
```
阅读全文