TypeError: ‘set’ 对象在 Python 中不可调用

TypeError: ‘set’ 对象在 Python 中不可调用

TypeError: ‘set’ object is not callable in Python

Python “TypeError: ‘set’ object is not callable” 发生在我们尝试将 set 对象作为函数调用时，例如通过覆盖内置set()
函数。要解决该错误，请确保您没有覆盖set并解决函数名和变量名之间的任何冲突。

这是错误如何发生的一个示例。

# 👇️ overriding built-in set()
set = set(['a', 'b', 'c'])

# ⛔️ TypeError: 'set' object is not callable
set(['d', 'e', 'f'])

我们覆盖内置set()函数，将其设置为一个set对象，并尝试将其作为函数调用。

要解决该错误，请确保重命名变量并重新启动脚本。

# ✅ Not overriding built-in set() anymore
my_set = set(['a', 'b', 'c'])

print(set(['d', 'e', 'f']))  # 👉️ {'d', 'f', 'e'}

错误的另一个常见原因是简单地尝试将 aset作为函数调用。

my_set = {'a', 'b', 'c'}

# ⛔️ TypeError: 'set' object is not callable
my_set()

要解决该错误，您要么必须删除括号，要么弄清楚如何为变量分配 aset而不是函数或类。

确保您没有同名的函数和变量。

def example():
    return 'hello world'


example = {'a', 'b', 'c'}

# ⛔️ TypeError: 'set' object is not callable
print(example())

重命名变量或函数可以解决错误。

当我们有一个类方法和一个同名的类属性时，也会导致错误。

class Employee():
    def __init__(self, tasks):
        # 👇️ this attribute hides the method
        self.tasks = tasks

    # 👇️ same name as class variable
    def tasks(self):
        return self.tasks


emp = Employee({'dev', 'test'})

# ⛔️ TypeError: 'set' object is not callable
print(emp.tasks())

该类Employee具有同名的方法和属性。

The attribute hides the method, so when we try to call the method on an instance
of the class, we get the object is not callable error.

To solve the error, you have to rename the class method.

class Employee():
    def __init__(self, tasks):
        self.tasks = tasks

    def get_tasks(self):
        return self.tasks


emp = Employee({'dev', 'test'})

print(emp.get_tasks())  # 👉️ {'test', 'dev'}

Once you rename the method, you will be able to call it without any issues.

Conclusion #

The Python “TypeError: ‘set’ object is not callable” occurs when we try to
call a set object as a function, e.g. by overriding the built-in set()
function. To solve the error, make sure you’re not overriding set and resolve
any clashes between function and variable names.