要查找对象的属性,请使用 Python 中的 getarr() 方法。要检查属性是否存在,请使用 hasattr() 方法。使用 Python 中的 setattr() 方法设置属性。
访问对象的属性
示例
要访问对象的属性,我们将使用 Python 中的 getattr() 方法 -
class student:
st_name ='Amit'
st_age ='18'
st_marks = '99'
def demo(self):
print(self.st_name)
print(self.st_age)
print(self.st_marks)
# Create objects
st1 = student()
st2 = student()
# The getattr() is used here
print ("Name = ",getattr(st1,'st_name'))
print ("Age = ",getattr(st2,'st_age'))
输出
Name = Amit
Age = 18
访问和设置类属性
示例
在此示例中,为了设置属性,我们将使用 setattr() 方法。
class student:
st_name ='Tim'
st_age ='18'
def demo(self):
print("Hello from demo() function")
# The getattr() is used here
print(getattr(student,'st_name'))
# Returns true if object has attribute
print(hasattr(student,'st_age'))
# Set additional attribute st_marks
setattr(student,'st_marks','95')
# Get Attribute
print(getattr(student,'st_marks'))
# Checking for an attribute
print(hasattr(student,'demo'))
输出
Tim
True
95
True
访问方法
示例
在这个例子中,我们将学习如何访问方法 -
class student:
st_name ='Tim'
st_age ='18'
def demo(self):
print("Hello from demo() function")
# The getattr() is used here
print(getattr(student,'st_name'))
# Returns true if object has attribute
print(hasattr(student,'st_age'))
# Set additional attribute st_marks
setattr(student,'st_marks','95')
# Get Attribute
print(getattr(student,'st_marks'))
# Checking for an attribute
print(hasattr(student,'demo'))
# Access methods using an object
st1 = student()
st1.demo()
输出
Tim
True
95
True
Hello from demo() function