How to check if an object has an attribute in Python?
To check if an object has an attribute in Python, you can use the hasattr function. This function takes two arguments: the object and the attribute name as a string. It returns True if the object has the attribute, and False if it does not.
For example:
class MyClass:
def __init__(self):
self.attribute = 'attribute'
obj = MyClass()
hasattr(obj, 'attribute') # returns True
hasattr(obj, 'other_attribute') # returns False
You can also use the getattr function to check if an object has an attribute, but hasattr is generally more convenient.
class MyClass:
def __init__(self):
self.attribute = 'attribute'
obj = MyClass()
getattr(obj, 'attribute', None) # returns 'attribute'
getattr(obj, 'other_attribute', None) # returns None
Note that hasattr and getattr will only work for attributes that are defined on the object itself, or on its class or any of its superclasses. They will not work for attributes that are stored in the object's __dict__ attribute, unless the attribute is defined in the class's __slots__ attribute.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
-
Convert bytes to a string in Python and vice versa?
To convert a string to bytes in Python, you can use the bytes function. This function takes two arguments: the string to encode and the encoding to use. The default encoding is utf-8. Here is an ex...
Questions -
Finding the index of an item in a Python list?
To find an index of the first occurrence of an element in a given list, you can use index method of List class with the element passed as an argument. The syntax is the following: my_list = [1...
Questions -
How do I get the last element of a list in Python?
To get the last element of a list in Python, you can use the negative indexing feature of the list data type. For example: mylist = [1, 2, 3, 4, 5] lastelement = mylist[-1] # lastelement will be 5...
Questions -
How to convert string into datetime in Python?
To convert a string into a datetime object in Python, you can use the datetime.strptime() function. This function allows you to specify the format of the input string, and it will return a datetime...
Questions