python - requests.exceptions.ConnectionError : HTTPConnectionPool(host ='127.0.0.1' , 端口 = 8000):超过最大重试次数，网址:/api/1/

Question

我正在尝试在 Django 之间进行通信和 Python文件，但我收到以下错误:

requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=8000): Max retries exceeded with url: /api/1/ (Caused by NewConnectionError(': Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))

我创建了一个名为 test.py 的 Python 文件在 Django应用程序并尝试在它们之间进行通信。我的 Pytho n 文件包含以下代码:

import requests
BASE_URL='http://127.0.0.1:8000/'
ENDPOINT='api/'
def get_resource(id):
    resp=requests.get(BASE_URL+ENDPOINT+id+'/')
    print(resp.status_code)
    print(resp.json()) 
id=input("Enter some ID: ")
get_resource(id)

Models.py包含:-

from django.db import models

# Create your models here.
class Employee(models.Model):
    eno=models.IntegerField()
    ename=models.CharField(max_length=70)
    esal=models.FloatField()
    eaddr=models.CharField(max_length=100)

Admin.py包含:-

from django.contrib import admin
from testapp.models import Employee
# Register your models here.
class EmployeeAdmin(admin.ModelAdmin):
    list_display=  ['id','eno','ename','esal','eaddr']

admin.site.register(Employee,EmployeeAdmin)

我的 Views.py包含:-

from django.shortcuts import render
from django.views.generic import View
from testapp.models import Employee
import json
from django.http import HttpResponse


class EmployeeDetailCBV(View):
def get(self,request,id,*args,**kwargs):
    emp = Employee.objects.get(id=id)  
    emp_data = {'eno':emp.eno , 'ename':emp.ename , 'esal':emp.esal , 'eaddr':emp.eaddr} 
    json_data=json.dumps(emp_data)
    return HttpResponse(json_data , content_type='application/json')

urls.py文件包含:-

from django.contrib import admin
from django.urls import path
from testapp import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('api/(?P<id>\d+)/$', views.EmployeeDetailCBV.as_view()),
]

得到错误，如:

requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=8000): Max retries exceeded with url: /api/1/ (Caused by NewConnectionError(': Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))

请帮我。谢谢各位技术....

Answer 1

我明白了失败背后的真正原因。我只从 1 个终端运行 py test.py 来访问 python 文件。当时服务器没有运行，因此无法进行通信。
然后我打开一个单独的终端并运行 Dev 服务器，现在我的 Python 文件能够与 Django 文件进行通信。
现在它运行良好。