编码判断和编码转换

def getCoding(strInput):
    '''
    获取编码格式
    '''
    if isinstance(strInput, unicode):
        return "unicode"
    try:
        strInput.decode("utf8")
        return 'utf8'
    except:
        pass
    try:
        strInput.decode("gbk")
        return 'gbk'
    except:
        pass

def tran2UTF8(strInput):
    '''
    转化为utf8格式
    '''
    strCodingFmt = getCoding(strInput)
    if strCodingFmt == "utf8":
        return strInput
    elif strCodingFmt == "unicode":
        return strInput.encode("utf8")
    elif strCodingFmt == "gbk":
        return strInput.decode("gbk").encode("utf8")

def tran2GBK(strInput):
    '''
    转化为gbk格式
    '''
    strCodingFmt = getCoding(strInput)
    if strCodingFmt == "gbk":
        return strInput
    elif strCodingFmt == "unicode":
        return strInput.encode("gbk")
    elif strCodingFmt == "utf8":
        return strInput.decode("utf8").encode("gbk")