简单的方法来随机化数组的条目使用STL？(easy way to randomize the entries of an array using stl?)

 更有说服力的是，我的目标是使多对多医院 - 用户关系的管理成为双向的。 也就是说，在Hospitals的管理页面上，您将获得一个filter_horizo​​ntal用户，在用户管理页面上，您将获得一个filter_horizo​​ntal for Hospitals。 
 
 我放弃了与User建立关系的想法，而是使用UserProfile。 我最终使用了这张7岁的Django票底部提到的确切代码。 
 
 最后，我的代码是 
 
#models.py
class ReverseManyToManyField(models.ManyToManyField):
    pass
try:
    import south
except ImportError:
    pass
else:
    from south.modelsinspector import add_ignored_fields
    add_ignored_fields([".*\.ReverseManyToManyField$",])

class Hospital(models.Model):
    name = models.CharField(max_length=200)
    authorized_users = models.ManyToManyField('UserProfile', blank=True)
    def __unicode__(self):
        return self.name

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    authorized_hospitals = ReverseManyToManyField(Hospital, through=Hospital.authorized_rads.through)

    def __unicode__(self):
        return self.user.username
 
 和 
 
#admin.py
##### Stuff to register UserProfile fields in the admin site
class UserProfileInline(admin.StackedInline):
    model=models.UserProfile
    can_delete = False
    verbose_name_plural = 'profiles'
    filter_horizontal = ('authorized_hospitals',)

class UserAdmin(UserAdmin):
    inlines = (UserProfileInline, )

class HospitalAdmin(admin.ModelAdmin):
    filter_horizontal = ('authorized_users', )

admin.site.unregister(User)
admin.site.register(User, UserAdmin)
##### END UserProfile Stuff

admin.site.register(models.Hospital, HospitalAdmin)

More eloquently stated, my goal was to make the administration of the many-to-many hospital-user relationship bidirectional. Which is to say, on the admin page for Hospitals, you'd get a filter_horizontal for users, and on the User admin page you'd get a filter_horizontal for Hospitals.
 
I ditched the idea of making the relationship with User, and instead made it with UserProfile. I ended up using the exact code mentioned at the bottom of this 7 year old standing Django ticket.
 
in the end, my code is
 
#models.py
class ReverseManyToManyField(models.ManyToManyField):
    pass
try:
    import south
except ImportError:
    pass
else:
    from south.modelsinspector import add_ignored_fields
    add_ignored_fields([".*\.ReverseManyToManyField$",])

class Hospital(models.Model):
    name = models.CharField(max_length=200)
    authorized_users = models.ManyToManyField('UserProfile', blank=True)
    def __unicode__(self):
        return self.name

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    authorized_hospitals = ReverseManyToManyField(Hospital, through=Hospital.authorized_rads.through)

    def __unicode__(self):
        return self.user.username
 
and
 
#admin.py
##### Stuff to register UserProfile fields in the admin site
class UserProfileInline(admin.StackedInline):
    model=models.UserProfile
    can_delete = False
    verbose_name_plural = 'profiles'
    filter_horizontal = ('authorized_hospitals',)

class UserAdmin(UserAdmin):
    inlines = (UserProfileInline, )

class HospitalAdmin(admin.ModelAdmin):
    filter_horizontal = ('authorized_users', )

admin.site.unregister(User)
admin.site.register(User, UserAdmin)
##### END UserProfile Stuff

admin.site.register(models.Hospital, HospitalAdmin)