Bool object is not iterable ошибка

I am having a strange problem. I have a method that returns a boolean. In turn I need the result of that function returned again since I cant directly call the method from the front-end. Here’s my code:

# this uses bottle py framework and should return a value to the html front-end
@get('/create/additive/<name>')
def createAdditive(name):
    return pump.createAdditive(name)



 def createAdditive(self, name):
        additiveInsertQuery = """ INSERT INTO additives
                                  SET         name = '""" + name + """'"""
        try:
            self.cursor.execute(additiveInsertQuery)
            self.db.commit()
            return True
        except:
            self.db.rollback()
            return False

This throws an exception: TypeError(«‘bool’ object is not iterable»,)

I don’t get this error at all since I am not attempting to «iterate» the bool value, only to return it.

If I return a string instead of boolean or int it works as expected. What could be an issue here?

Traceback:

Traceback (most recent call last):
  File "C:Python33libsite-packagesbottle.py", line 821, in _cast
    out = iter(out)
TypeError: 'bool' object is not iterable

Источник

Python TypeError: 'bool' object is not iterable message means a Boolean object (True or False) is being used in a context where an iterable object (like a list or tuple) is expected.

To solve this error, you need to correct the line where you iterate over a bool object.

An iterable object is an object that can be looped over, such as a list, tuple, or string.

In contrast, a Boolean object is a single value and cannot be looped over. Consider the code below:

x = True

for value in x:  # ❗️
    print(value)

The for loop in the code above tries to loop over the x variable, which is a Boolean.

This causes the following error:

Traceback (most recent call last):
  File ...
    for value in x:
TypeError: 'bool' object is not iterable

To avoid the error above, you need to pass an iterable object such as a list, a string, or a tuple to the for statement:

x = ["apple", "orange"] 

for value in x:
    print(value)

# apple
# orange

One common cause of this error is when you reassign your variable value after it has been created.

In the following example, the x variable is first initialized as a list, but got reassigned as Boolean down the line:

# x initialized as a list
x = [1, 2, 3]

# x reassigned as a boolean
x = True

When you use the x variable after the x = True line, then you will get the 'bool' object is not iterable error.

Another common scenario where this error occurs is when you pass a Boolean object to a function that requires an iterable.

For example, the list(), tuple(), set(), and dict() functions all require an iterable to be passed:

x = True

# ❌ TypeError: 'bool' object is not iterable
list(x)
tuple(x)
set(x)
dict(x)

You can also add an if statement to check if your variable is a boolean:

x = True

if type(x) == bool:
    print("x is of type Boolean.")  # ✅
else:
    print("x is not of type Boolean.")

Or you can also use the isinstance() function to check if x is an instance of the bool class:

x = True

if isinstance(x, bool):
    print("x is of type Boolean.")  # ✅
else:
    print("x is not of type Boolean.")

When you see a variable identified as a Boolean, you need to inspect your code and make sure that the variable is not re-assigned as Boolean after it has been declared.

You will avoid this error as long as you don’t pass a Boolean object where an iterable is expected.

Источник

The “typeerror: ‘bool’ object is not iterable” is an error message in Python.

If you are wondering how to resolve this type error, keep reading.

In this article, you’ll get the solution that will fix the “bool object is not iterable” type error.

Aside from that, we’ll give you some insight into this error and why it occurs in Python scripts.

A ‘bool’ object is a data type in Python that represents a boolean value.

“Boolean” value represents one of two values: True or False.

These values are used to represent the truth value of an expression.

For instance, if you want to compare two values using a comparison operator such as (<, >, !=, ==, <=, or >=), the expression is evaluated.

And Python returns a “boolean” value (True or False) indicating whether the comparison is true.

Moreover, “bool” objects are often used in conditional statements and loops to control the flow of a program.

However, it’s important to note that “boolean” values and operators are not sequences that can be iterated over.

What is “typeerror: ‘bool’ object is not iterable”?

The “typeerror: ‘bool’ object is not iterable” occurs when you try to iterate over a boolean value (true or false) instead of an iterable object (like a list, string or tuple).

For example:

my_bool = True

for sample in my_bool:
    print(sample)

If you run this code, it will throw an error message since a boolean value is not iterable.

TypeError: 'bool' object is not iterable

This is not allowed because “boolean value” is not a collection or sequence that can be iterated over.

How to fix “typeerror: ‘bool’ object is not iterable”?

Here are the following solutions that will help you to fix this type error:

1: Assign an iterable object to the variable

Rather than assigning a boolean value to the variable. You can assign an iterable object such as a list, string, or tuple.

my_list = [10, 20, 30, 40, 50]
for sample in my_list:
    print(sample)

As you can see in this example code, we assign a list to the variable my_list and iterate over it using a for loop.

Since a list is iterable, this code will run smoothly.

Output:

10
20
30
40
50

2: Use if statement

When you need to check on a boolean value, you can simply use an if statement instead of a for loop.

my_bool = True
if my_bool:
    print("This example is True")
else:
    print("The example is False")

In this example code, we check if the boolean value “my_bool” is True using an if statement.

If the value is True, then it will print a message indicating that “This example is True”.

Otherwise, it will print a different message.

Output:

This example is True

3: Convert the boolean value to an iterable object

When you need to iterate over a boolean value, you just have to convert it to an iterable object, such as a list, string, or tuple.

my_bool = True
my_list = [my_bool]
for sample in my_list:
    print(sample)

Output:

True

4: Use generator expression

When you need to iterate over multiple boolean values, you can use a generator expression to create an iterable object.

my_bools = [True, False, True]
result = (x for x in my_bools if x)
for sample in result:
    print(sample)

As you can see in this example code, we use a generator expression to create an iterable object.

That contains only the True values from the list my_bools.

Then iterate over this iterable object using a for loop.

Output;

True
True

5: Use the isinstance() function

Before iterating over a variable, you can check its type using the isinstance() function to ensure it is an iterable object.

my_var = True
if isinstance(my_var, (list, tuple, str)):
    for sample in my_var:
        print(sample)
else:
    print("my_var is not iterable")

Here, we use the isinstance() function to check if the variable my_var is an instance of a list, tuple, or string.

Since it is not, it will print a message rather than try to iterate over it.

Output:

my_var is not iterable

Conclusion

In conclusion, the “typeerror: ‘bool’ object is not iterable” occurs when you try to iterate over a boolean value (True or False) instead of an iterable object (like a list, string or tuple).

Luckily, this article provided several solutions above so that you can fix the “bool object is not iterable” error message.

We are hoping that this article provided you with sufficient solutions to get rid of the error.

You could also check out other “typeerror” articles that may help you in the future if you encounter them.

  • Typeerror unsupported operand type s for str and float
  • Typeerror: ‘dict_keys’ object is not subscriptable
  • Typeerror: object of type ndarray is not json serializable

Thank you very much for reading to the end of this article.

Источник
SUMMARY

While trying to create a new gitlab project with the ansible module gitlab_project it fails with an error message:

An exception occurred during task execution. To see the full traceback, use -vvv. The error was: TypeError: 'bool' object is not iterable
fatal: [10.100.2.107 -> localhost]: FAILED! => {"changed": false, "module_stderr": "Traceback (most recent call last):n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 395, in <module>n    main()n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 368, in mainn    project_exists = project.existsProject(group_name, project_name)n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 199, in existsProjectn    if self.existsGroup(group_name):n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 220, in existsGroupn    for data in user_data:nTypeError: 'bool' object is not iterablen", "module_stdout": "", "msg": "MODULE FAILURE", "rc": 1}
ISSUE TYPE
  • Bug Report
COMPONENT NAME

gitlab_project

ANSIBLE VERSION
ansible 2.6.2
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.5 (default, Aug  4 2017, 00:39:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]
CONFIGURATION
DEFAULT_HOST_LIST(/etc/ansible/ansible.cfg) = [u'/etc/ansible/hosts']
RETRY_FILES_SAVE_PATH(/etc/ansible/ansible.cfg) = /root/.ansible-retry
OS / ENVIRONMENT
Linux ansible.host.example 3.10.0-693.21.1.el7.x86_64 #1 SMP Wed Mar 7 19:03:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Linux ansible.target.host.example.com 3.10.0-862.11.6.el7.x86_64 #1 SMP Tue Aug 14 21:49:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
STEPS TO REPRODUCE
    - name: CREATE GIT REPO
      gitlab_project:
        server_url: "https://git.example.com/"
        login_token: "xxxxxxxxxxxxxxxxx"
        name: "{{ ansible_hostname }}"
        group: "etckeeper"
        state: present
      delegate_to: localhost
EXPECTED RESULTS

It should create a project in our git instance named with the targets hostname

ACTUAL RESULTS

It stops with this error:

An exception occurred during task execution. To see the full traceback, use -vvv. The error was: TypeError: 'bool' object is not iterable
fatal: [10.100.2.107 -> localhost]: FAILED! => {"changed": false, "module_stderr": "Traceback (most recent call last):n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 395, in <module>n    main()n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 368, in mainn    project_exists = project.existsProject(group_name, project_name)n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 199, in existsProjectn    if self.existsGroup(group_name):n  File "/tmp/ansible_L6tvt3/ansible_module_gitlab_project.py", line 220, in existsGroupn    for data in user_data:nTypeError: 'bool' object is not iterablen", "module_stdout": "", "msg": "MODULE FAILURE", "rc": 1}
Источник

У меня странная проблема. У меня есть метод, который возвращает логическое значение. В свою очередь мне нужен результат этой функции, возвращенный снова, поскольку я не могу напрямую вызвать метод из front-end. Здесь мой код:

# this uses bottle py framework and should return a value to the html front-end
@get('/create/additive/<name>')
def createAdditive(name):
    return pump.createAdditive(name)



 def createAdditive(self, name):
        additiveInsertQuery = """ INSERT INTO additives
                                  SET         name = '""" + name + """'"""
        try:
            self.cursor.execute(additiveInsertQuery)
            self.db.commit()
            return True
        except:
            self.db.rollback()
            return False

Это создает исключение: TypeError (объект ‘bool’ не является итерабельным «,)

Я не получаю эту ошибку вообще, так как я не пытаюсь «перебирать» значение bool, а только возвращать ее.

Если я возвращаю строку вместо boolean или int, она работает так, как ожидалось. Что может быть проблемой здесь?

Traceback:

Traceback (most recent call last):
  File "C:Python33libsite-packagesbottle.py", line 821, in _cast
    out = iter(out)
TypeError: 'bool' object is not iterable
Источник

Возможно, вам также будет интересно:

  • Bool object is not callable ошибка
  • Bookworm 5791f53b far cry 5 ошибка
  • Bookwinx ошибка у вас нет прав для просмотра этой страницы или для выполнения этого действия
  • Bookmate windows ошибка соединения
  • Bonjour для варкрафт 3 ошибка

    • Понравилась статья? Поделить с друзьями:
    0 0 голоса
    Рейтинг статьи
    Подписаться
    Уведомить о
    guest

    0 комментариев
    Старые
    Новые Популярные
    Межтекстовые Отзывы
    Посмотреть все комментарии