• 统一收单下单并支付页面接口：alipay.trade.page.pay
• 统一收单线下交易查询接口：alipay.trade.query
• 公共参数：sing_type,sing.
• 请求参数：和业务相关。out_trade_no:订单号。
• 线下查询：特殊可选参数，两个参数，添一个就行（订单号 或 支付宝号）。

• 安装：pip install python-alipay-sdk --upgrade
• 在支付宝中设置密码，公钥私钥

alipay = AliPay(
    appid="",
    app_notify_url=None,  # the default notify path
    app_private_key_string=app_private_key_string,
    # alipay public key, do not use your own public key!
    alipay_public_key_string=alipay_public_key_string,
    sign_type="RSA", # RSA or RSA2
    debug=False  # False by default.如果是沙箱环境。配置为True
)

    # 如果你是Python 2用户（考虑考虑升级到Python 3吧），请确保非ascii的字符串为utf8编码：
    subject = u"测试订单".encode("utf8")
    # 如果你是 Python 3的用户，使用默认的字符串即可
    subject = "测试订单"
    
    # 电脑网站支付，需要跳转到https://openapi.alipay.com/gateway.do? + order_string
    order_string = alipay.api_alipay_trade_page_pay(
        out_trade_no="20161112",
        total_amount=0.01,
        subject=subject,
        return_url="https://example.com",
        notify_url="https://example.com/notify" # 可选, 不填则使用默认notify url
    )
    
    pay_url = "https://openapi.alipay.com/gateway.do?" + order_string

• 打开支付页面地址：window.open(pay_url)
• 统一收单线下交易查询：alipay.trade.query

{
    "code": "10000",
    "msg": "Success",
    "trade_no": "2013112011001004330000121536",
    "out_trade_no": "6823789339978248",
    "buyer_logon_id": "159****5620",
    "trade_status": "TRADE_CLOSED",
    "total_amount": 88.88,
    "trans_currency": "TWD",
    "settle_currency": "USD",
    "settle_amount": 2.96,
    "pay_currency": 1,
    "pay_amount": "8.88",
    "settle_trans_rate": "30.025",
    "trans_pay_rate": "0.264",
    "buyer_pay_amount": 8.88,
    "point_amount": 10,
    "invoice_amount": 12.11,
    "send_pay_date": "2014-11-27 15:45:57",
    "receipt_amount": "15.25",
    "store_id": "NJ_S_001",
    "terminal_id": "NJ_T_001",
}