关于python：ValueError：类型名称和字段名称必须是有效的标识符：namedtuple

ValueError: Type names and field names must be valid identifiers: namedtuple

我在flask view函数中有以下内容(我使用的是python 3.6)：

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@login_required
@main.route('/dashboard', methods=['GET', 'POST'])
def dashboard():
if request.method =='POST':
dash_data = namedtuple('dash_data',[('posting', str), ('folder', str)])
print(request.form.get('posting'))

posted_data= dash_data(posting=request.form.get('posting'),folder=request.form.get('folder'))

我得到：

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Traceback (most recent call last):
File"...\lib\site-packages\flask\app.py", line 1997, in __call__
return self.wsgi_app(environ, start_response)
File"...\lib\site-packages\flask\app.py", line 1985, in wsgi_app
response = self.handle_exception(e)
File"...\lib\site-packages\flask\app.py", line 1540, in handle_exception
reraise(exc_type, exc_value, tb)
File"...\lib\site-packages\flask\_compat.py", line 33, in reraise
raise value
File"...\lib\site-packages\flask\app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File"...\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File"...\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File"...\lib\site-packages\flask\_compat.py", line 33, in reraise
raise value
File"...\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File"...\lib\site-packages\flask\app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File"E:\ENVS
3\posterizer2\app\main\views.py", line 387, in cl_dash
Cl_dash_data = namedtuple('cl_dash_data',[('posting', str), ('folder', str)])
File"...\lib\collections\__init__.py", line 403, in namedtuple
'identifiers: %r' % name)
ValueError: Type names and field names must be valid identifiers:"('posting', <class 'str'>)"

号

我做错什么了？

namedtuple对象不接受(attribute, type)元组的列表，它们只希望属性(或单个字符串)不可重复：

1	namedtuple('dash_data', ('posting', 'folder'))

或：

1	namedtuple('dash_data', 'posting folder')

号

有关如何使用namedtuple的信息，请参阅文档。