Create IMDB_GO_CLIENT_CN.md

doc/IMDB_GO_CLIENT_CN.md

+＃如何在Paddle Serving使用Go Client
+
+(简体中文|[English](./IMDB_GO_CLIENT.md))
+
+本文档说明了如何将Go用作客户端语言。对于Paddle Serving中的Go客户端，提供了一个简单的客户端程序包https://github.com/PaddlePaddle/Serving/tree/develop/go/serving_client，用户可以根据需要引用该程序包。这是一个基于IMDB数据集的情感分析任务的简单示例。
+
+###安装
+
+我们假设您已经安装了Go 1.9.2或更高版本，并且安装了python 2.7版本
+
+```shell
+go get github.com/PaddlePaddle/Serving/go/serving_client
+go get github.com/PaddlePaddle/Serving/go/proto
+pip install paddle-serving-server
+```
+###下载文本分类模型
+
+```shell
+wget https://paddle-serving.bj.bcebos.com/data%2Ftext_classification%2Fimdb_serving_example.tar.gz
+tar -xzf imdb_serving_example.tar.gz
+```
+
+###服务器端代码
+
+```python
+# test_server_go.py
+import os
+import sys
+from paddle_serving_server import OpMaker
+from paddle_serving_server import OpSeqMaker
+from paddle_serving_server import Server
+
+op_maker = OpMaker ()
+read_op = op_maker.create ('general_text_reader')
+general_infer_op = op_maker.create ('general_infer')
+general_response_op = op_maker.create ('general_text_response')
+
+op_seq_maker = OpSeqMaker ()
+op_seq_maker.add_op (read_op)
+op_seq_maker.add_op (general_infer_op)
+op_seq_maker.add_op (general_response_op)
+
+server = Server ()
+server.set_op_sequence (op_seq_maker.get_op_sequence ())
+server.load_model_config (sys.argv [1])
+server.prepare_server (workdir = "work_dir1", port = 9292, device = "cpu")
+server.run_server ()
+```
+
+###启动服务器
+
+```shell
+python test_server_go.py ./serving_server_model/ 9292
+```
+
+###客户端代码示例
+
+```go
+// imdb_client.go
+package main
+
+import (
+       "io"
+       "fmt"
+       "strings"
+       "bufio"
+       "strconv"
+       "os"
+       serving_client "github.com/PaddlePaddle/Serving/go/serving_client"
+)
+
+func main () {
+     var config_file_path string
+     config_file_path = os.Args [1]
+     handle: = serving_client.LoadModelConfig (config_file_path)
+     handle = serving_client.Connect ("127.0.0.1", "9292", handle)
+
+     test_file_path: = os.Args [2]
+     fi, err: = os.Open (test_file_path)
+     if err! = nil {
+     fmt.Print (err)
+     }
+
+     defer fi.Close ()
+     br: = bufio.NewReader (fi)
+
+     fetch: = [] string {"cost", "acc", "prediction"}
+
+     var result map [string] [] float32
+
+     for {
+     line, err: = br.ReadString ('\ n')
+if err == io.EOF {
+break
+}
+
+line = strings.Trim (line, "\ n")
+
+var words = [] int64 {}
+
+s: = strings.Split (line, "")
+value, err: = strconv.Atoi (s [0])
+var feed_int_map map [string] [] int64
+       
+for _, v: = range s [1: value + 1] {
+int_v, _: = strconv.Atoi (v)
+words = append (words, int64 (int_v))
+}
+
+label, err: = strconv.Atoi (s [len (s) -1])
+
+if err! = nil {
+panic (err)
+}
+
+feed_int_map = map [string] [] int64 {}
+feed_int_map ["words"] = words
+feed_int_map ["label"] = [] int64 {int64 (label)}
+Ranch
+result = serving_client.Predict (handle, feed_int_map, fetch)
+fmt.Println (result ["prediction"] [1], "\ t", int64 (label))
+    }
+}
+```
+
+###基于IMDB测试集的预测
+
+```python
+go run imdb_client.go serving_client_conf / serving_client_conf.stream.prototxt test.data> result
+```
+
+###计算精度
+
+```python
+// acc.go
+package main
+
+import (
+       "io"
+       "os"
+       "fmt"
+       "bufio"
+       "strings"
+       "strconv"
+)
+
+func main () {
+     score_file: = os.Args [1]
+     fi, err: = os.Open (score_file)
+     if err! = nil {
+     fmt.Print (err)
+     }
+
+     defer fi.Close ()
+     br: = bufio.NewReader (fi)
+    
+     total: = int (0)
+     acc: = int (0)
+     for {
+     line, err: = br.ReadString ('\ n')
+     if err == io.EOF {
+        break
+     }
+    
+     line = strings.Trim (line, "\ n")
+     s: = strings.Split (line, "\ t")
+     prob_str: = strings.Trim (s [0], "")
+     label_str: = strings.Trim (s [1], "")
+     prob, err: = strconv.ParseFloat (prob_str, 32)
+     if err! = nil {
+        panic (err)
+     }
+     label, err: = strconv.ParseFloat (label_str, 32)
+     if err! = nil {
+        panic (err)
+     }
+     if (prob-0.5) * (label-0.5)> 0 {
+        acc ++
+     }
+     total ++
+    }
+    fmt.Println ("total num:", total)
+    fmt.Println ("acc num:", acc)
+    fmt.Println ("acc:", float32 (acc) / float32 (total))
+
+}
+```
+
+```shell
+go run acc.go result
+total num: 25000
+acc num: 22014
+acc: 0.88056
+```