python - 使用字符串变量调用 GraphQL API

Question

我想执行一个简单的 GraphQL我在其中传递变量的查询。

import requests
import json

var = "whatever"

query = """
    query ($var: String!){
        styles(locale: "en", styleNumbers: [ $var] ) {
            styleOptions {
    parms {
        parm1
        parm2
            }
        }
        }
    }
"""

url = 'https://sth_random.io/graphql?'
response = requests.get(url, json={'query': query, '$var': var})
response = response.json()

print(response)

但我收到以下错误:

{'errors': [{'message': 'Variable "$var" of required type "String!" was not provided.', 'locations': [{'line': 2, 'column': 12}]}]}

我错过了什么？

先感谢您。

Answer 1

请求正文应包含 variables键本身就是变量值的字典:

variables = {'var': var}
response = requests.post(url, json={'query': query, 'variables': variables})