django urls() 对基数为 10 的 int() 无效文字：

Question

我有一个评论网站，我正在尝试使用特定用户名发布所有评论。即“.../评论/用户/用户名”。网址.py：urlpatterns = [    ...    url(r'^reviews/user/(?P<username>\w+)$', views.user_review_list, name='user_review_list'),]views.py（User_Name 是数据库中列的名称）：def user_review_list(request, username):    latest_review_list = Review.objects.filter(User_Name=username).order_by('-Pub_Date')    context = {'latest_review_list': latest_review_list, 'User_Name': username}    return render(request, 'bourbons/user_review_list.html', context)我称之为 html 文件：<h5>Rated {{ review.Rating }} of 5 by <u><a href="{% url 'app:user_review_list' review.User_Name %}" style="color:#ffffff">    {{ review.User_Name }}</a></u></h5>我发现了一些其他使用不同方法的帖子，但我仍然不断收到错误消息：“ValueError：int() 的无效文字以 10 为基数：'用户/用户名'”。我觉得错误在 urls.py 部分甚至之前，因为我已经多次更改了 views.py 函数并且错误没有改变。我正在使用 Django 版本 1.11.6。谢谢这是来自反馈的额外内容......主要网址.pyfrom django.conf.urls import url, includefrom django.contrib import adminfrom django.conf import settingsfrom django.conf.urls.static import staticfrom . import viewsurlpatterns = [    url(r'^$', views.home, name='home'),    url(r'^facts', views.facts, name='facts'),    url(r'^contact', views.contact, name='contact'),    url(r'^admin', include(admin.site.urls)),    url(r'^app/', include('app.urls', namespace='app')),    url(r'^accounts/', include('registration.backends.simple.urls')),    url(r'^accounts/', include('django.contrib.auth.urls', namespace="auth")),] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)应用网址.pyfrom django.conf.urls import urlfrom . import viewsurlpatterns = [    url(r'^$', views.bourbon_list, name='app_list'),    url(r'^app/(?P<ID>.+)$', views.app_detail, name='app_detail'),    url(r'^reviews$', views.review_list, name='review_list'),    url(r'^reviews/(?P<RatingID>.+)$', views.review_detail, name='review_detail'),    url(r'^reviews/user/(?P<username>\w+)$', views.user_review_list, name='user_review_list'),]