iam_token.json文件和input.json文件准备参见，注意事项也参考

https://bbs.huaweicloud.com/blogs/233074

下面的代码需要根据自己的服务进行获取，获取方式同样参考https://bbs.huaweicloud.com/blogs/233074

代码一共分两部分，第一部分是获取token，第二部分是调用推理请求。获取token的代码每12个小时更新一次就可以，不能频繁的调用，如果每次推理请求都调用一次token的更新，会导致获取token请求被拒绝。

import pycurl
import json
import sys
import os
import certifi
from io import BytesIO


class Storage:
    def __init__(self):
        self.contents = ''
        self.line = 0

    def store(self, buf):
        self.line = self.line + 1
        self.contents = "%s%i: %s" % (self.contents, self.line, buf)

    def __str__(self):
        return self.contents

retrieved_body = Storage()
retrieved_headers = Storage()

buffer = BytesIO()
c = pycurl.Curl()
f = open('./iam_token.json')
data=f.read()
f.close()
c.setopt(c.URL,'https://iam.cn-east-3.myhuaweicloud.com/v3/auth/tokens')
c.setopt(pycurl.HTTPHEADER, ['Content-Type: application/json;charset=utf8'])
c.setopt(pycurl.POST, 1)
c.setopt(pycurl.POSTFIELDS, data)
c.setopt(c.WRITEFUNCTION, retrieved_body.store)
c.setopt(c.HEADERFUNCTION, retrieved_headers.store)
c.perform()
c.close()

tmp_rec_data=retrieved_headers.contents.split("\\r\\n")
tmp_token=""
for each_item in tmp_rec_data:
    if "X-Subject-Token" in each_item:
        start_index=each_item.find("X-Subject-Token")
        tmp_token=each_item[(start_index + len("X-Subject-Token")):]
token_value = "X-Auth-Token" + tmp_token
#print(token_value)



c = pycurl.Curl()
buffer = BytesIO()
c.setopt(pycurl.HTTPHEADER, [token_value,'Content-Type: application/json;charset=utf8'])
c.setopt(c.URL,'https://xxxxx.apig.cn-east-3.huaweicloudapis.com/v1/infers/xxxxx')
c.setopt(pycurl.POST, 1)
c.setopt(c.WRITEDATA, buffer)
f = open('./input.json')
request_data=f.read()
f.close()
#print(request_data)
c.setopt(pycurl.POSTFIELDS, request_data)
c.perform()
c.close()
body = buffer.getvalue()
print(body.decode('utf-8'))