!14775 Fix codex & pylint & cpplint problem for master

From: @xiefangqi
Reviewed-by: @heleiwang,@liucunwei
Signed-off-by: @liucunwei

mindspore/ccsrc/minddata/dataset/core/data_type.cc

@@ -51,7 +51,11 @@ uint8_t DataType::AsCVType() const {
   }
 
   if (res == kCVInvalidType) {
-    std::string err_msg = "Cannot convert [" + std::string(kTypeInfo[type_].name_) + "] to OpenCV type.";
+    std::string type_name = "unknown";
+    if (type_ < DataType::NUM_OF_TYPES) {
+      type_name = std::string(kTypeInfo[type_].name_);
+    }
+    std::string err_msg = "Cannot convert [" + type_name + "] to OpenCV type.";
     err_msg += " Currently unsupported data type: [uint32, int64, uint64, string]";
     MS_LOG(ERROR) << err_msg;
   }

mindspore/ccsrc/minddata/dataset/engine/datasetops/map_op/cpu_map_job.cc

@@ -18,6 +18,7 @@
 #include <vector>
 #include <utility>
 #include <set>
+#include <string>
 #include "minddata/dataset/engine/datasetops/map_op/cpu_map_job.h"
 
 namespace mindspore {

mindspore/ccsrc/minddata/dataset/util/rdr.h

@@ -24,7 +24,7 @@ namespace mindspore {
 namespace dataset {
 class MDChannelInfo {
  public:
-  explicit MDChannelInfo(std::string channel_name) : channel_name_(channel_name) {}
+  explicit MDChannelInfo(std::string channel_name) : channel_name_(channel_name), preprocess_batch_(0) {}
 
   ~MDChannelInfo() = default;
 

model_zoo/official/cv/faster_rcnn/src/dataset.py

@@ -20,12 +20,12 @@ import os
 import numpy as np
 from numpy import random
 
+import cv2
 import mmcv
 import mindspore.dataset as de
 import mindspore.dataset.vision.c_transforms as C
 from mindspore.mindrecord import FileWriter
 from src.config import config
-import cv2
 
 
 def bbox_overlaps(bboxes1, bboxes2, mode='iou'):