TypeError: 'datetime.date' object is not subscriptable
TypeError: 'datetime.date' object is not subscriptable
我正在尝试创建一个带有 3 个参数的自定义模板标签。我正在尝试计算两个日期之间的天数，同时从该计数中排除周末天数。根据部门的不同，每个用户的周末也不同。所以我需要将 start_date、end_date、user_id 传递给模板标记函数。这是我到目前为止所做的：
from django import template
from datetime import datetime, timedelta, date
register = template.Library()
@register.filter('date_diff_helper')
def date_diff_helper(startdate, enddate):
return [startdate, enddate]
@register.filter(name='date_diff')
def date_diff(dates, user_id):
start_date = dates[0]
end_date = dates[1]
count = 0
weekends = ["Friday", "Saturday"]
for days in range((end_date - start_date).days + 1):
if start_date.strftime("%A") not in weekends:
count += 1
else:
start_date += timedelta(days=1)
continue
if start_date == end_date:
break
start_date += timedelta(days=1)
return count
这就是我在模板中调用这些函数的方式：
{{ leave.start_date|date_diff_helper:leave.end_date|date_diff:leave.emp_id }}
当我 运行 代码时，它给我 TypeError 说 'datetime.date' object is not subscriptable。当我试图检查 date_diff 函数中 dates 参数的类型时，它说：
< class 'list'>
< class 'datetime.date'>
但是当它试图将 start_date 指定为第一个日期对象时，如 start_date = dates[0]，它甚至会抛出错误。这是错误的完整回溯：
Traceback:
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\handlers\exception.py" in inner
34. response = get_response(request)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\handlers\base.py" in _get_response
115. response = self.process_exception_by_middleware(e, request)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\handlers\base.py" in _get_response
113. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\views\generic\base.py" in view
71. return self.dispatch(request, *args, **kwargs)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\views\generic\base.py" in dispatch
97. return handler(request, *args, **kwargs)
File "C:\Projects\LMS\LMSAdmin\views.py" in get
203. return render(request, self.template_name, {'leave_requests': leave_requests})
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\loader.py" in render_to_string
62. return template.render(context, request)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\backends\django.py" in render
61. return self.template.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
171. return self._render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\loader_tags.py" in render
150. return compiled_parent._render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\loader_tags.py" in render
62. result = block.nodelist.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\defaulttags.py" in render
209. nodelist.append(node.render_annotated(context))
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
987. output = self.filter_expression.resolve(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in resolve
698. new_obj = func(obj, *arg_vals)
File "C:\Projects\LMS\LMSAdmin\templatetags\LMSAdmin_tags.py" in date_diff
38. start_date = dates[0]
Exception Type: TypeError at /lms_admin/SeniorManagementAdmin/
Exception Value: 'datetime.date' object is not subscriptable
我是 Django 的初学者并且 Python。
编辑
这是我检查 dates 变量类型的方式：
def date_diff(dates, user_id):
print(type(dates))
#if I removed these two lines, the result is only < class 'list'>
start_date = dates[0]
end_date = dates[1]
...
当我访问该页面时，它在控制台中打印出类型是列表和日期时间。但是如果我删除上面的 start_date 和 end_date 变量，它只会打印出 < class 'list'>。我不明白这种行为。
When I run the code, it gives me TypeError saying 'datetime.date' object is not subscriptable. When I tried to check the type of dates parameter in date_diff function, it says:
< class 'list'>
< class 'datetime.date'>
这表明您实际上 两次 调用了模板中的过滤器 - 第一个正确，第二个不正确。
我正在尝试创建一个带有 3 个参数的自定义模板标签。我正在尝试计算两个日期之间的天数，同时从该计数中排除周末天数。根据部门的不同，每个用户的周末也不同。所以我需要将 start_date、end_date、user_id 传递给模板标记函数。这是我到目前为止所做的：
from django import template
from datetime import datetime, timedelta, date
register = template.Library()
@register.filter('date_diff_helper')
def date_diff_helper(startdate, enddate):
return [startdate, enddate]
@register.filter(name='date_diff')
def date_diff(dates, user_id):
start_date = dates[0]
end_date = dates[1]
count = 0
weekends = ["Friday", "Saturday"]
for days in range((end_date - start_date).days + 1):
if start_date.strftime("%A") not in weekends:
count += 1
else:
start_date += timedelta(days=1)
continue
if start_date == end_date:
break
start_date += timedelta(days=1)
return count
这就是我在模板中调用这些函数的方式：
{{ leave.start_date|date_diff_helper:leave.end_date|date_diff:leave.emp_id }}
当我 运行 代码时，它给我 TypeError 说 'datetime.date' object is not subscriptable。当我试图检查 date_diff 函数中 dates 参数的类型时，它说：
< class 'list'>
< class 'datetime.date'>
但是当它试图将 start_date 指定为第一个日期对象时，如 start_date = dates[0]，它甚至会抛出错误。这是错误的完整回溯：
Traceback:
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\handlers\exception.py" in inner
34. response = get_response(request)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\handlers\base.py" in _get_response
115. response = self.process_exception_by_middleware(e, request)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\handlers\base.py" in _get_response
113. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\views\generic\base.py" in view
71. return self.dispatch(request, *args, **kwargs)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\views\generic\base.py" in dispatch
97. return handler(request, *args, **kwargs)
File "C:\Projects\LMS\LMSAdmin\views.py" in get
203. return render(request, self.template_name, {'leave_requests': leave_requests})
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\loader.py" in render_to_string
62. return template.render(context, request)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\backends\django.py" in render
61. return self.template.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
171. return self._render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\loader_tags.py" in render
150. return compiled_parent._render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\loader_tags.py" in render
62. result = block.nodelist.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\defaulttags.py" in render
209. nodelist.append(node.render_annotated(context))
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in render
987. output = self.filter_expression.resolve(context)
File "C:\Users\Naeem.Khan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\template\base.py" in resolve
698. new_obj = func(obj, *arg_vals)
File "C:\Projects\LMS\LMSAdmin\templatetags\LMSAdmin_tags.py" in date_diff
38. start_date = dates[0]
Exception Type: TypeError at /lms_admin/SeniorManagementAdmin/
Exception Value: 'datetime.date' object is not subscriptable
我是 Django 的初学者并且 Python。
编辑
这是我检查 dates 变量类型的方式：
def date_diff(dates, user_id):
print(type(dates))
#if I removed these two lines, the result is only < class 'list'>
start_date = dates[0]
end_date = dates[1]
...
当我访问该页面时，它在控制台中打印出类型是列表和日期时间。但是如果我删除上面的 start_date 和 end_date 变量，它只会打印出 < class 'list'>。我不明白这种行为。
When I run the code, it gives me TypeError saying 'datetime.date' object is not subscriptable. When I tried to check the type of dates parameter in date_diff function, it says:
< class 'list'>
< class 'datetime.date'>
这表明您实际上 两次 调用了模板中的过滤器 - 第一个正确，第二个不正确。