show me the error

Author: XieBiao

README.md

@@ -64,7 +64,12 @@ analysis.Start([]string{"#", ":"})
 //Find the csv file in default target folder: ./reports
 //CSV file name format: redis-analysis-{host:port}-{db}.csv
 //The keys order by count desc
-analysis.SaveReports("./reports")
+err = analysis.SaveReports("./reports")
+if err == nil {
+    fmt.Println("done")
+} else {
+    fmt.Println("error:", err)
+}
 ```
 
 - Analyze keys by redis `RDB` file, but cannot work out the size of key.
@@ -86,7 +91,12 @@ analysis.StartRDB([]string{"#", ":"})
 //Find the csv file in default target folder: ./reports
 //CSV file name format: redis-analysis-{host:port}-{db}.csv
 //The keys order by count desc
-analysis.SaveReports("./reports")
+err = analysis.SaveReports("./reports")
+if err == nil {
+    fmt.Println("done")
+} else {
+    fmt.Println("error:", err)
+}
 ```
 
 ![CSV](https://raw.githubusercontent.com/hhxsv5/go-redis-memory-analysis/master/examples/demo.png)

examples/build.go

@@ -18,24 +18,28 @@ func main() {
 	flag.Parse()
 
 	analysis := gorma.NewAnalysis()
+	var err error
 	if len(*rdb) > 0 {
-		err := analysis.OpenRDB(*rdb)
+		err = analysis.OpenRDB(*rdb)
 		defer analysis.CloseRDB()
 		if err != nil {
 			fmt.Println("something wrong:", err)
 			return
 		}
 		analysis.StartRDB(strings.Split(*prefixes, "//"))
 	} else {
-		err := analysis.Open(*ip, uint16(*port), *password)
+		err = analysis.Open(*ip, uint16(*port), *password)
 		defer analysis.Close()
 		if err != nil {
 			fmt.Println("something wrong:", err)
 			return
 		}
 		analysis.Start(strings.Split(*prefixes, "//"))
 	}
-	analysis.SaveReports(*reportPath)
-
-	fmt.Println("done")
+	err = analysis.SaveReports(*reportPath)
+	if err == nil {
+		fmt.Println("done")
+	} else {
+		fmt.Println("error:", err)
+	}
 }

examples/main.go

@@ -22,7 +22,10 @@ func main() {
 	//Find the csv file in default target folder: ./reports
 	//CSV file name format: redis-analysis-{host:port}-{db}.csv
 	//The keys order by count desc
-	analysis.SaveReports("./reports")
-
-	fmt.Println("done")
+	err = analysis.SaveReports("./reports")
+	if err == nil {
+		fmt.Println("done")
+	} else {
+		fmt.Println("error:", err)
+	}
 }

examples/rdb.go

@@ -22,7 +22,10 @@ func main() {
 	//Find the csv file in default target folder: ./reports
 	//CSV file name format: redis-analysis-{host:port}-{db}.csv
 	//The keys order by count desc
-	analysis.SaveReports("./reports")
-
-	fmt.Println("done")
+	err = analysis.SaveReports("./reports")
+	if err == nil {
+		fmt.Println("done")
+	} else {
+		fmt.Println("error:", err)
+	}
 }