Python If 语句在测试 1 到 10 之间的数字时不起作用

Question

尝试让 if 语句发挥作用。

from __future__ import unicode_literals

from django.shortcuts import render

def index(request):
   return render(request, 'landscapes/index.html')

def landscape(request, id):
    print id
    if id>=1 and id<=10:
        print 'true'
        landscape = 'https://wildwithgrace.files.wordpress.com/2010/12/snowy-landscape.jpg'
    context = {
        'landscape': landscape
    }
    return render(request, 'landscapes/landscape.html', context)

即使数字大于 1 且小于 10，也只会在/# 处返回 UnboundLocalError。

url.py:

from django.conf.urls import url, include
from . import views

urlpatterns = [
    url(r'^$', views.index),
    url(r'^(?P<id>\d+)$', views.landscape),
]

Answer 1

def landscape(request, id):
    print id
    if int(id) >= 1 and int(id) <= 10:
        print 'true'
        landscape = 'https://wildwithgrace.files.wordpress.com/2010/12/snowy-landscape.jpg'
        context = {
            'landscape': landscape
        }
    else:
        context = {}
    return render(request, 'landscapes/landscape.html', context)

试试这个