python类的使用方法图解_Python接口开发实现步骤详解

一、操作步骤

1. 导入&＃xff1a;import flask,json

2. 实例化&＃xff1a;api &＃61; flask.Flask(__name__)

3. 定义接口访问路径及访问方式&＃xff1a;&＃64;api.route(&＃39;/index&＃39;,methods&＃61;[&＃39;get/post/PUT/DELETE&＃39;])

4. 定义函数&＃xff0c;注意需与路径的名称一致&＃xff0c;设置返回类型并支持中文&＃xff1a;def index(): return json.dumps(ren,ensure_ascii&＃61;False)

5. 三种格式入参访问接口&＃xff1a;

5.1 url格式入参&＃xff1a;flask.request.args.get(&＃39;id&＃39;)

5.2 form-data格式入参&＃xff1a;pwd &＃61; flask.request.values.get(&＃39;pwd&＃39;)

5.3 josn格式入参&＃xff1a;pwd &＃61; flask.request.json.get(&＃39;pwd&＃39;)

6. 启动服务&＃xff1a;api.run(port&＃61;8888,debug&＃61;True,host&＃61;&＃39;127.0.0.1&＃39;)&＃xff0c;开启服务之后&＃xff0c;就可以通过ip&＃43;端口&＃43;路径&＃43;入参访问接口

二、源码举例

#!/usr/bin/python3

# encoding:utf-8

import flask,json

# 实例化api&＃xff0c;把当前这个python文件当作一个服务&＃xff0c;__name__代表当前这个python文件

api &＃61; flask.Flask(__name__)

# &＃39;index&＃39;是接口路径&＃xff0c;methods不写&＃xff0c;默认get请求

&＃64;api.route(&＃39;/index&＃39;,methods&＃61;[&＃39;get&＃39;])

# get方式访问

def index():

ren &＃61; {&＃39;msg&＃39;:&＃39;成功访问首页&＃39;,&＃39;msg_code&＃39;:200}

#json.dumps 序列化时对中文默认使用的ascii编码.想输出中文需要指定ensure_ascii&＃61;False

return json.dumps(ren,ensure_ascii&＃61;False)

#post入参访问方式一&＃xff1a;url格式参数

&＃64;api.route(&＃39;/article&＃39;,methods&＃61;[&＃39;post&＃39;])

def article():

#url格式参数?id&＃61;12589&name&＃61;&＃39;lishi&＃39;

id &＃61; flask.request.args.get(&＃39;id&＃39;)

if id:

if id &＃61;&＃61; &＃39;12589&＃39;:

ren &＃61; {&＃39;msg&＃39;:&＃39;成功访问文章&＃39;,&＃39;msg_code&＃39;:200}

else:

ren &＃61; {&＃39;msg&＃39;:&＃39;找不到文章&＃39;,&＃39;msg_code&＃39;:400}

else:

ren &＃61; {&＃39;msg&＃39;:&＃39;请输入文章id参数&＃39;,&＃39;msg_code&＃39;:-1}

return json.dumps(ren,ensure_ascii&＃61;False)

#post入参访问方式二&＃xff1a;from-data&＃xff08;k-v&＃xff09;格式参数

&＃64;api.route(&＃39;/login&＃39;,methods&＃61;[&＃39;post&＃39;])

def login():

#from-data格式参数

usrname &＃61; flask.request.values.get(&＃39;usrname&＃39;)

pwd &＃61; flask.request.values.get(&＃39;pwd&＃39;)

if usrname and pwd:

if usrname &＃61;&＃61;&＃39;test&＃39; and pwd &＃61;&＃61;&＃39;123456&＃39;:

ren &＃61; {&＃39;msg&＃39;:&＃39;登录成功&＃39;,&＃39;msg_code&＃39;:200}

else:

ren &＃61; {&＃39;msg&＃39;:&＃39;用户名或密码错误&＃39;,&＃39;msg_code&＃39;:-1}

else:

ren &＃61; {&＃39;msg&＃39;:&＃39;用户名或密码为空&＃39;,&＃39;msg_code&＃39;:1001}

return json.dumps(ren,ensure_ascii&＃61;False)

#post入参访问方式二&＃xff1a;josn格式参数

&＃64;api.route(&＃39;/loginjosn&＃39;,methods&＃61;[&＃39;post&＃39;])

def loginjosn():

#from-data格式参数

usrname &＃61; flask.request.json.get(&＃39;usrname&＃39;)

pwd &＃61; flask.request.json.get(&＃39;pwd&＃39;)

if usrname and pwd:

if usrname &＃61;&＃61;&＃39;test&＃39; and pwd &＃61;&＃61;&＃39;123456&＃39;:

ren &＃61; {&＃39;msg&＃39;:&＃39;登录成功&＃39;,&＃39;msg_code&＃39;:200}

else:

ren &＃61; {&＃39;msg&＃39;:&＃39;用户名或密码错误&＃39;,&＃39;msg_code&＃39;:-1}

else:

ren &＃61; {&＃39;msg&＃39;:&＃39;用户名或密码为空&＃39;,&＃39;msg_code&＃39;:1001}

return json.dumps(ren,ensure_ascii&＃61;False)

if __name__ &＃61;&＃61; &＃39;__main__&＃39;:

api.run(port&＃61;8888,debug&＃61;True,host&＃61;&＃39;127.0.0.1&＃39;) # 启动服务

# debug&＃61;True,改了代码后&＃xff0c;不用重启&＃xff0c;它会自动重启

# &＃39;host&＃61;&＃39;127.0.0.1&＃39;别IP访问地址

运行结果

* Serving Flask app "restful" (lazy loading)

* Environment: production

WARNING: This is a development server. Do not use it in a production deployment.

Use a production WSGI server instead.

* Debug mode: on

* Restarting with stat

* Debugger is active!

* Debugger PIN: 249-915-285

* Running on http://127.0.0.1:8888/ (Press CTRL&＃43;C to quit)

三、postman访问接口

get方式&＃xff0c;无参数访问接口

post方式&＃xff0c;url格式入参访问接口

post方式&＃xff0c;form-data格式入参访问接口

post方式&＃xff0c;josn格式入参访问接口

以上就是本文的全部内容&＃xff0c;希望对大家的学习有所帮助&＃xff0c;也希望大家多多支持python博客。