1）配置变量->全局变量

config = Config("登录 ") \
    .variables(
    **{
        "user_name": "${ENV(USERNAME)}",
        "password": "${ENV(PASSWORD)}",
    }
) 

2）导出变量->将局部变量变成全局变量

config = Config("登录 ") \
    .variables(
    **{
        "user_name": "${ENV(USERNAME)}",
        "password": "${ENV(PASSWORD)}",
    }
) \
    .export("token")

3）参数变量->局部变量

.with_json({"account": "$user_name", "password": "$password"})

4）提取变量->局部变量

.extract()
.with_jmespath("body.user_id", "user_id")
.with_jmespath("body.token", "token")

备注：局部变量优先级高于全局变量，局部变量名称尽量不要和全局变量名称相同