如何将这段 go 语言代码转为 python

func RsaDecrypt(hexContext []byte) ([]byte,error) {\
counts := len(hexContext)/2/64\
div := len(hexContext)%128\
fixCharCounts := len(hexContext)/counts\
var resultString = ""\
block, _ := pem.Decode([]byte(privateKey))\
//解析PKCS1格式的私钥\
priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)\
for i :=0; i < counts;i++ {\
context,err:= hex.DecodeString(string(hexContext[(ifixCharCounts) : ((i+1) fixCharCounts)]))\
byteItem,err := rsa.DecryptPKCS1v15(rand.Reader, priv, context)
resultString += string(byteItem)\
}\
return []byte(resultString),nil\
}\