本文實(shí)例講述了Python使用微信SDK實(shí)現(xiàn)的微信支付功能。分享給大家供大家參考，具體如下：

最近一段時(shí)間一直在搞微信平臺(tái)開發(fā)，v3.37版本微信支付接口變化賊大，所以就看著php的demo移植為Python版，為了保持一致，所以接口方法基本都沒有變，這樣的好處就是不用寫demo了，看著微信官方的demo照葫蘆畫瓢就可以了。

代碼放到github下載地址：https://github.com/Skycrab/wzhifuSDK

還可以點(diǎn)擊此處本站下載。

我主要測(cè)試了JsApi調(diào)用方式，其它的調(diào)用方式并沒有測(cè)試，如果你發(fā)現(xiàn)了bug，請(qǐng)多多pull request，我將不甚感激。

方便觀看，代碼貼于此。

#coding:utf-8"""Created on 2014-11-24@author: http://blog.csdn.net/yueguanghaidao * 微信支付幫助庫 * ==================================================== * 接口分三種類型： * 【請(qǐng)求型接口】--Wxpay_client_ *   統(tǒng)一支付接口類--UnifiedOrder *   訂單查詢接口--OrderQuery *   退款申請(qǐng)接口--Refund *   退款查詢接口--RefundQuery *   對(duì)賬單接口--DownloadBill *   短鏈接轉(zhuǎn)換接口--ShortUrl * 【響應(yīng)型接口】--Wxpay_server_ *   通用通知接口--Notify *   Native支付——請(qǐng)求商家獲取商品信息接口--NativeCall * 【其他】 *   靜態(tài)鏈接二維碼--NativeLink *   JSAPI支付--JsApi * ===================================================== * 【CommonUtil】常用工具： *   trimString()，設(shè)置參數(shù)時(shí)需要用到的字符處理函數(shù) *   createNoncestr()，產(chǎn)生隨機(jī)字符串，不長(zhǎng)于32位 *   formatBizQueryParaMap(),格式化參數(shù)，簽名過程需要用到 *   getSign(),生成簽名 *   arrayToXml(),array轉(zhuǎn)xml *   xmlToArray(),xml轉(zhuǎn) array *   postXmlCurl(),以post方式提交xml到對(duì)應(yīng)的接口url *   postXmlSSLCurl(),使用證書，以post方式提交xml到對(duì)應(yīng)的接口url"""import jsonimport timeimport randomimport urllib2import hashlibimport threadingfrom urllib import quoteimport xml.etree.ElementTree as ETtry:  import pycurl  from cStringIO import StringIOexcept ImportError:  pycurl = Noneclass WxPayConf_pub(object):  """配置賬號(hào)信息"""  #=======【基本信息設(shè)置】=====================================  #微信公眾號(hào)身份的唯一標(biāo)識(shí)。審核通過后，在微信發(fā)送的郵件中查看  APPID = "wx8888888888888888"  #JSAPI接口中獲取openid，審核后在公眾平臺(tái)開啟開發(fā)模式后可查看  APPSECRET = "48888888888888888888888888888887"  #受理商ID，身份標(biāo)識(shí)  MCHID = "18888887"  #商戶支付密鑰Key。審核通過后，在微信發(fā)送的郵件中查看  KEY = "48888888888888888888888888888886"  #=======【異步通知url設(shè)置】===================================  #異步通知url，商戶根據(jù)實(shí)際開發(fā)過程設(shè)定  NOTIFY_URL = "http://******.com/payback"  #=======【JSAPI路徑設(shè)置】===================================  #獲取access_token過程中的跳轉(zhuǎn)uri，通過跳轉(zhuǎn)將code傳入jsapi支付頁面  JS_API_CALL_URL = "http://******.com/pay/?showwxpaytitle=1"  #=======【證書路徑設(shè)置】=====================================  #證書路徑,注意應(yīng)該填寫絕對(duì)路徑  SSLCERT_PATH = "/******/cacert/apiclient_cert.pem"  SSLKEY_PATH = "/******/cacert/apiclient_key.pem"  #=======【curl超時(shí)設(shè)置】===================================  CURL_TIMEOUT = 30  #=======【HTTP客戶端設(shè)置】===================================  HTTP_CLIENT = "CURL" # ("URLLIB", "CURL")class Singleton(object):  """單例模式"""  _instance_lock = threading.Lock()  def __new__(cls, *args, **kwargs):    if not hasattr(cls, "_instance"):      with cls._instance_lock:        if not hasattr(cls, "_instance"):          impl = cls.configure() if hasattr(cls, "configure") else cls          instance = super(Singleton, cls).__new__(impl, *args, **kwargs)          instance.__init__(*args, **kwargs)          cls._instance = instance    return cls._instanceclass UrllibClient(object):  """使用urlib2發(fā)送請(qǐng)求"""  def get(self, url, second=30):    return self.postXml(None, url, second)  def postXml(self, xml, url, second=30):    """不使用證書"""    data = urllib2.urlopen(url, xml, timeout=second).read()    return data  def postXmlSSL(self, xml, url, second=30):    """使用證書"""    raise TypeError("please use CurlClient")class CurlClient(object):  """使用Curl發(fā)送請(qǐng)求"""  def __init__(self):    self.curl = pycurl.Curl()    self.curl.setopt(pycurl.SSL_VERIFYHOST, False)    self.curl.setopt(pycurl.SSL_VERIFYPEER, False)    #設(shè)置不輸出header    self.curl.setopt(pycurl.HEADER, False)  def get(self, url, second=30):    return self.postXmlSSL(None, url, second=second, cert=False, post=False)  def postXml(self, xml, url, second=30):    """不使用證書"""    return self.postXmlSSL(xml, url, second=second, cert=False, post=True)  def postXmlSSL(self, xml, url, second=30, cert=True, post=True):    """使用證書"""    self.curl.setopt(pycurl.URL, url)    self.curl.setopt(pycurl.TIMEOUT, second)    #設(shè)置證書    #使用證書：cert 與 key 分別屬于兩個(gè).pem文件    #默認(rèn)格式為PEM，可以注釋    if cert:      self.curl.setopt(pycurl.SSLKEYTYPE, "PEM")      self.curl.setopt(pycurl.SSLKEY, WxPayConf_pub.SSLKEY_PATH)      self.curl.setopt(pycurl.SSLCERTTYPE, "PEM")      self.curl.setopt(pycurl.SSLCERT, WxPayConf_pub.SSLKEY_PATH)    #post提交方式    if post:      self.curl.setopt(pycurl.POST, True)      self.curl.setopt(pycurl.POSTFIELDS, xml)    buff = StringIO()    self.curl.setopt(pycurl.WRITEFUNCTION, buff.write)    self.curl.perform()    return buff.getvalue()class HttpClient(Singleton):  @classmethod  def configure(cls):    if pycurl is not None and WxPayConf_pub.HTTP_CLIENT != "URLLIB":      return CurlClient    else:      return UrllibClientclass Common_util_pub(object):  """所有接口的基類"""  def trimString(self, value):    if value is not None and len(value) == 0:      value = None    return value  def createNoncestr(self, length = 32):    """產(chǎn)生隨機(jī)字符串，不長(zhǎng)于32位"""    chars = "abcdefghijklmnopqrstuvwxyz0123456789"    strs = []    for x in range(length):      strs.append(chars[random.randrange(0, len(chars))])    return "".join(strs)  def formatBizQueryParaMap(self, paraMap, urlencode):    """格式化參數(shù)，簽名過程需要使用"""    slist = sorted(paraMap)    buff = []    for k in slist:      v = quote(paraMap[k]) if urlencode else paraMap[k]      buff.append("{0}={1}".format(k, v))    return "&".join(buff)  def getSign(self, obj):    """生成簽名"""    #簽名步驟一：按字典序排序參數(shù),formatBizQueryParaMap已做    String = self.formatBizQueryParaMap(obj, False)    #簽名步驟二：在string后加入KEY    String = "{0}&key={1}".format(String,WxPayConf_pub.KEY)    #簽名步驟三：MD5加密    String = hashlib.md5(String).hexdigest()    #簽名步驟四：所有字符轉(zhuǎn)為大寫    result_ = String.upper()    return result_  def arrayToXml(self, arr):    """array轉(zhuǎn)xml"""    xml = ["<xml>"]    for k, v in arr.iteritems():      if v.isdigit():        xml.append("<{0}>{1}</{0}>".format(k, v))      else:        xml.append("<{0}><![CDATA[{1}]]></{0}>".format(k, v))    xml.append("</xml>")    return "".join(xml)  def xmlToArray(self, xml):    """將xml轉(zhuǎn)為array"""    array_data = {}    root = ET.fromstring(xml)    for child in root:      value = child.text      array_data[child.tag] = value    return array_data  def postXmlCurl(self, xml, url, second=30):    """以post方式提交xml到對(duì)應(yīng)的接口url"""    return HttpClient().postXml(xml, url, second=second)  def postXmlSSLCurl(self, xml, url, second=30):    """使用證書，以post方式提交xml到對(duì)應(yīng)的接口url"""    return HttpClient().postXmlSSL(xml, url, second=second)class JsApi_pub(Common_util_pub):  """JSAPI支付——H5網(wǎng)頁端調(diào)起支付接口"""  code = None  #code碼，用以獲取openid  openid = None #用戶的openid  parameters = None #jsapi參數(shù)，格式為json  prepay_id = None #使用統(tǒng)一支付接口得到的預(yù)支付id  curl_timeout = None #curl超時(shí)時(shí)間  def __init__(self, timeout=WxPayConf_pub.CURL_TIMEOUT):    self.curl_timeout = timeout  def createOauthUrlForCode(self, redirectUrl):    """生成可以獲得code的url"""    urlObj = {}    urlObj["appid"] = WxPayConf_pub.APPID    urlObj["redirect_uri"] = redirectUrl    urlObj["response_type"] = "code"    urlObj["scope"] = "snsapi_base"    urlObj["state"] = "STATE#wechat_redirect"    bizString = self.formatBizQueryParaMap(urlObj, False)    return "https://open.weixin.qq.com/connect/oauth2/authorize?"+bizString  def createOauthUrlForOpenid(self):    """生成可以獲得openid的url"""    urlObj = {}    urlObj["appid"] = WxPayConf_pub.APPID    urlObj["secret"] = WxPayConf_pub.APPSECRET    urlObj["code"] = self.code    urlObj["grant_type"] = "authorization_code"    bizString = self.formatBizQueryParaMap(urlObj, False)    return "https://api.weixin.qq.com/sns/oauth2/access_token?"+bizString  def getOpenid(self):    """通過curl向微信提交code，以獲取openid"""    url = self.createOauthUrlForOpenid()    data = HttpClient().get(url)    self.openid = json.loads(data)["openid"]    return self.openid  def setPrepayId(self, prepayId):    """設(shè)置prepay_id"""    self.prepay_id = prepayId  def setCode(self, code):    """設(shè)置code"""    self.code = code  def getParameters(self):    """設(shè)置jsapi的參數(shù)"""    jsApiObj = {}    jsApiObj["appId"] = WxPayConf_pub.APPID    timeStamp = int(time.time())    jsApiObj["timeStamp"] = "{0}".format(timeStamp)    jsApiObj["nonceStr"] = self.createNoncestr()    jsApiObj["package"] = "prepay_id={0}".format(self.prepay_id)    jsApiObj["signType"] = "MD5"    jsApiObj["paySign"] = self.getSign(jsApiObj)    self.parameters = json.dumps(jsApiObj)    return self.parametersclass Wxpay_client_pub(Common_util_pub):  """請(qǐng)求型接口的基類"""  response = None #微信返回的響應(yīng)  url = None    #接口鏈接  curl_timeout = None #curl超時(shí)時(shí)間  def __init__(self):    self.parameters = {} #請(qǐng)求參數(shù)，類型為關(guān)聯(lián)數(shù)組    self.result = {}   #返回參數(shù)，類型為關(guān)聯(lián)數(shù)組  def setParameter(self, parameter, parameterValue):    """設(shè)置請(qǐng)求參數(shù)"""    self.parameters[self.trimString(parameter)] = self.trimString(parameterValue)  def createXml(self):    """設(shè)置標(biāo)配的請(qǐng)求參數(shù)，生成簽名，生成接口參數(shù)xml"""    self.parameters["appid"] = WxPayConf_pub.APPID  #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID  #商戶號(hào)    self.parameters["nonce_str"] = self.createNoncestr()  #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters)  #簽名    return self.arrayToXml(self.parameters)  def postXml(self):    """post請(qǐng)求xml"""    xml = self.createXml()    self.response = self.postXmlCurl(xml, self.url, self.curl_timeout)    return self.response  def postXmlSSL(self):    """使用證書post請(qǐng)求xml"""    xml = self.createXml()    self.response = self.postXmlSSLCurl(xml, self.url, self.curl_timeout)    return self.response  def getResult(self):    """獲取結(jié)果，默認(rèn)不使用證書"""    self.postXml()    self.result = self.xmlToArray(self.response)    return self.resultclass UnifiedOrder_pub(Wxpay_client_pub):  """統(tǒng)一支付接口類"""  def __init__(self, timeout=WxPayConf_pub.CURL_TIMEOUT):    #設(shè)置接口鏈接    self.url = "https://api.mch.weixin.qq.com/pay/unifiedorder"    #設(shè)置curl超時(shí)時(shí)間    self.curl_timeout = timeout    super(UnifiedOrder_pub, self).__init__()  def createXml(self):    """生成接口參數(shù)xml"""    #檢測(cè)必填參數(shù)    if any(self.parameters[key] is None for key in ("out_trade_no", "body", "total_fee", "notify_url", "trade_type")):      raise ValueError("missing parameter")    if self.parameters["trade_type"] == "JSAPI" and self.parameters["openid"] is None:      raise ValueError("JSAPI need openid parameters")    self.parameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)    self.parameters["spbill_create_ip"] = "127.0.0.1" #終端ip    self.parameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters) #簽名    return self.arrayToXml(self.parameters)  def getPrepayId(self):    """獲取prepay_id"""    self.postXml()    self.result = self.xmlToArray(self.response)    prepay_id = self.result["prepay_id"]    return prepay_idclass OrderQuery_pub(Wxpay_client_pub):  """訂單查詢接口"""  def __init__(self, timeout=WxPayConf_pub.CURL_TIMEOUT):    #設(shè)置接口鏈接    self.url = "https://api.mch.weixin.qq.com/pay/orderquery"    #設(shè)置curl超時(shí)時(shí)間    self.curl_timeout = timeout    super(OrderQuery_pub, self).__init__()  def createXml(self):    """生成接口參數(shù)xml"""    #檢測(cè)必填參數(shù)    if any(self.parameters[key] is None for key in ("out_trade_no", "transaction_id")):      raise ValueError("missing parameter")    self.parameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)    self.parameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters) #簽名    return self.arrayToXml(self.parameters)class Refund_pub(Wxpay_client_pub):  """退款申請(qǐng)接口"""  def __init__(self, timeout=WxPayConf_pub.CURL_TIMEOUT):    #設(shè)置接口鏈接    self.url = "https://api.mch.weixin.qq.com/secapi/pay/refund"    #設(shè)置curl超時(shí)時(shí)間    self.curl_timeout = timeout    super(Refund_pub, self).__init__()  def createXml(self):    """生成接口參數(shù)xml"""    if any(self.parameters[key] is None for key in ("out_trade_no", "out_refund_no", "total_fee", "refund_fee", "op_user_id")):      raise ValueError("missing parameter")    self.parameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)    self.parameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters) #簽名    return self.arrayToXml(self.parameters)  def getResult(self):    """ 獲取結(jié)果，使用證書通信(需要雙向證書)"""    self.postXmlSSL()    self.result = self.xmlToArray(self.response)    return self.resultclass RefundQuery_pub(Wxpay_client_pub):  """退款查詢接口"""  def __init__(self, timeout=WxPayConf_pub.CURL_TIMEOUT):    #設(shè)置接口鏈接    self.url = "https://api.mch.weixin.qq.com/pay/refundquery"    #設(shè)置curl超時(shí)時(shí)間    self.curl_timeout = timeout    super(RefundQuery_pub, self).__init__()  def createXml(self):    """生成接口參數(shù)xml"""    if any(self.parameters[key] is None for key in ("out_refund_no", "out_trade_no", "transaction_id", "refund_id")):      raise ValueError("missing parameter")    self.parameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)    self.parameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters) #簽名    return self.arrayToXml(self.parameters)  def getResult(self):    """ 獲取結(jié)果，使用證書通信(需要雙向證書)"""    self.postXmlSSL()    self.result = self.xmlToArray(self.response)    return self.resultclass DownloadBill_pub(Wxpay_client_pub):  """對(duì)賬單接口"""  def __init__(self, timeout=WxPayConf_pub.CURL_TIMEOUT):    #設(shè)置接口鏈接    self.url = "https://api.mch.weixin.qq.com/pay/downloadbill"    #設(shè)置curl超時(shí)時(shí)間    self.curl_timeout = timeout    super(DownloadBill_pub, self).__init__()  def createXml(self):    """生成接口參數(shù)xml"""    if any(self.parameters[key] is None for key in ("bill_date", )):      raise ValueError("missing parameter")    self.parameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)    self.parameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters) #簽名    return self.arrayToXml(self.parameters)  def getResult(self):    """獲取結(jié)果，默認(rèn)不使用證書"""    self.postXml()    self.result = self.xmlToArray(self.response)    return self.resultclass ShortUrl_pub(Wxpay_client_pub):  """短鏈接轉(zhuǎn)換接口"""  def __init__(self, timeout=WxPayConf_pub.CURL_TIMEOUT):    #設(shè)置接口鏈接    self.url = "https://api.mch.weixin.qq.com/tools/shorturl"    #設(shè)置curl超時(shí)時(shí)間    self.curl_timeout = timeout    super(ShortUrl_pub, self).__init__()  def createXml(self):    """生成接口參數(shù)xml"""    if any(self.parameters[key] is None for key in ("long_url", )):      raise ValueError("missing parameter")    self.parameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)    self.parameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters) #簽名    return self.arrayToXml(self.parameters)  def getShortUrl(self):    """獲取prepay_id"""    self.postXml()    prepay_id = self.result["short_url"]    return prepay_idclass Wxpay_server_pub(Common_util_pub):  """響應(yīng)型接口基類"""  SUCCESS, FAIL = "SUCCESS", "FAIL"  def __init__(self):    self.data = {} #接收到的數(shù)據(jù)，類型為關(guān)聯(lián)數(shù)組    self.returnParameters = {} #返回參數(shù)，類型為關(guān)聯(lián)數(shù)組  def saveData(self, xml):    """將微信的請(qǐng)求xml轉(zhuǎn)換成關(guān)聯(lián)數(shù)組，以方便數(shù)據(jù)處理"""    self.data = self.xmlToArray(xml)  def checkSign(self):    """校驗(yàn)簽名"""    tmpData = dict(self.data) #make a copy to save sign    del tmpData['sign']    sign = self.getSign(tmpData) #本地簽名    if self.data['sign'] == sign:      return True    return False  def getData(self):    """獲取微信的請(qǐng)求數(shù)據(jù)"""    return self.data  def setReturnParameter(self, parameter, parameterValue):    """設(shè)置返回微信的xml數(shù)據(jù)"""    self.returnParameters[self.trimString(parameter)] = self.trimString(parameterValue)  def createXml(self):    """生成接口參數(shù)xml"""    return self.arrayToXml(self.returnParameters)  def returnXml(self):    """將xml數(shù)據(jù)返回微信"""    returnXml = self.createXml()    return returnXmlclass Notify_pub(Wxpay_server_pub):  """通用通知接口"""class NativeCall_pub(Wxpay_server_pub):  """請(qǐng)求商家獲取商品信息接口"""  def createXml(self):    """生成接口參數(shù)xml"""    if self.returnParameters["return_code"] == self.SUCCESS:      self.returnParameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID      self.returnParameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)      self.returnParameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串      self.returnParameters["sign"] = self.getSign(self.returnParameters) #簽名    return self.arrayToXml(self.returnParameters)  def getProductId(self):    """獲取product_id"""    product_id = self.data["product_id"]    return product_idclass NativeLink_pub(Common_util_pub):  """靜態(tài)鏈接二維碼"""  url = None #靜態(tài)鏈接  def __init__(self):    self.parameters = {} #靜態(tài)鏈接參數(shù)  def setParameter(self, parameter, parameterValue):    """設(shè)置參數(shù)"""    self.parameters[self.trimString(parameter)] = self.trimString(parameterValue)  def createLink(self):    if any(self.parameters[key] is None for key in ("product_id", )):      raise ValueError("missing parameter")    self.parameters["appid"] = WxPayConf_pub.APPID #公眾賬號(hào)ID    self.parameters["mch_id"] = WxPayConf_pub.MCHID #商戶號(hào)    time_stamp = int(time.time())    self.parameters["time_stamp"] = "{0}".format(time_stamp) #時(shí)間戳    self.parameters["nonce_str"] = self.createNoncestr() #隨機(jī)字符串    self.parameters["sign"] = self.getSign(self.parameters) #簽名    bizString = self.formatBizQueryParaMap(self.parameters, false)    self.url = "weixin://wxpay/bizpayurl?"+bizString  def getUrl(self):    """返回鏈接"""    self.createLink()    return self.urldef test():  c = HttpClient()  assert c.get("http://www.baidu.com")[:15] == "<!DOCTYPE html>"  c2 = HttpClient()  assert id(c) == id(c2)if __name__ == "__main__":  test()