python调用接口方式

阅读原文时间：2023年07月08日阅读：2

python中调用API的几种方式：

- urllib2
- requests

一、调用别人的接口

案例1、urllib2

import urllib2, urllib
github_url ='https://api.github.com/user/repos'
password_manager = urllib2.HTTPPasswordMgrWithDefaultRealm()
password_manager.add_password(None,github_url, 'user', '***')
auth = urllib2.HTTPBasicAuthHandler(password_manager)# create an authentication handler
opener = urllib2.build_opener(auth)# create an opener with the authentication handler
urllib2.install_opener(opener)# install the opener
…
request = urllib2.Request(github_url,
urllib.urlencode({
'name': 'Test repo',
'description': 'Some test repository'
}))# Manual encoding required
handler = urllib2.urlopen(request)
print handler.read()

案例2、requests

import requests, json
github_url = "
data = json.dumps({'name':'test', 'description':'some test repo'})
r = requests.post(github_url, data, auth=('user', '*****'))
print r.json

import requests
from lxml import etree
from random import randint

def get_joke():
url="http://www.qiushibaike.com/text/page/"+ str(randint(1,5))
r = requests.get(url)
tree = etree.HTML(r.text)
contentlist = tree.xpath('//div[@class="content"]/span')
jokes = []
for content in contentlist:
content = content.xpath('string(.)') # string() 函数将所有子文本串联起来，# 必须传递单个节点，而不是节点集。
if '查看全文' in content: # 忽略包含“查看原文”笑话
continue
jokes.append(content)
joke = jokes[randint(1, len(jokes))].strip()
return joke

if __name__ == "__main__":
content = get_joke()
print(content)

二、python一个http接口服务，给别人调用 ----之Flask

案例1、flask、get接口代码实现

# -*- coding: UTF-8 -*-

flask

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/test', methods=["GET"])
def calculate():
a = request.args.get("a", 0)
b = request.args.get("b", 0)
c = int(a) + int(b)
res = {"result": c}
return jsonify(content_type='application/json;charset=utf-8',
reason='success',
charset='utf-8',
status='200',
content=res)

if __name__ == '__main__':
app.run(host='0.0.0.0',
threaded=True,
debug=False,

调用方式：

http://127.0.0.1:8080/test?a=1&b=4

案例2、post接口flask

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/test', methods=["POST"])
def calculate():
params = request.form if request.form else request.json
print(params)
a = params.get("a", 0)
b = params.get("b", 0)
c = a + b
res = {"result": c}
return jsonify(content_type='application/json;charset=utf-8',
reason='success',
charset='utf-8',
status='200',
content=res)

if __name__ == '__main__':
app.run(host='0.0.0.0',
threaded=True,
debug=True,
port=8080)

调用方式

http://127.0.0.1:8080/test

最常用接口形式

POST API接口：

import json
import requests
if __name__ == '__main__':
url = "http://127.0.0.1:9001/rsa/set_uplod"
headers = {'content-type': 'application/json'}
requestData = {"certificate_no": "56565656565656", "auth_code": "123456"}
ret = requests.post(url, json=requestData, headers=headers)
if ret.status_code == 200:
text = json.loads(ret.text)
print(text)

get API 接口：

import json
import requests

if __name__ == '__main__':

url = "http://127.0.0.1:9001/getSha1Test?message=APP000051527151133935949D49FDC0A86605313931B9BB9A4C87"  
ret = requests.get(url)  
if ret.status\_code == 200:  
    text = json.loads(ret.text)  
    print(text)

三、二、python一个http接口服务，给别人调用 ----之FastAPI

这次选择fastapi，FastAPI是一个现代的、快速（高性能）的web框架，用于基于标准Python类型提示使用Python 3.6+构建api。具有快速、快速编码、更少的错误、直观、简单、简便、健壮。简易而且本地win10能够跑起来。

二、FastAPI的get接口代码实现

1. 安装: pip install fastapi

pip install uvicorn

# !/usr/bin/python

from fastapi import FastAPI

app = FastAPI()

@app.get('/test/a={a}/b={b}')
def calculate(a: int=None, b: int=None):
c = a + b
res = {"res":c}
return res

if __name__ == '__main__':
import uvicorn
uvicorn.run(app=app,
host="0.0.0.0",
port=8080,
workers=1)

接口访问:http://127.0.0.1:8080/test/a=1/b=4

from pydantic import BaseModel
from fastapi import FastAPI