@@ -10,6 +10,7 @@ class Program
         static int Main(string[] args)
         {
             new TestSysIO().ToConsoleOut();
+            new TestSysIO().ToNullTextWriter();
             new TestSysIO().ToTextWriter();
             //TestMatplotlib.Plot();
             //TestMatplotlib.PlotInWindow();
 
@@ -1,4 +1,5 @@
 using Python.Runtime;
+using System;
 using System.IO;
 
 namespace Test
@@ -7,25 +8,42 @@ class TestSysIO
     {
         public void ToConsoleOut()
         {
-            // redirect to Console.Out
+            // redirect to Console.Out, I usually put this at the entrance of a program.
             PySysIO.ToConsoleOut();
+
             //test
             using (Py.GIL())
             {
-                PythonEngine.RunSimpleString("print('hello pythonnet!')");
+                PythonEngine.RunSimpleString("print('hello ConsoleOut!')");
+            }
+        }
+
+        public void ToNullTextWriter()
+        {
+            // redirect to a TextWriter
+            PySysIO.ToTextWriter();
+
+            //test
+            using (Py.GIL())
+            {
+                PythonEngine.RunSimpleString("print('hello NullTextWriter!')");
             }
         }
 
         public void ToTextWriter()
         {
             // redirect to a TextWriter
-            var writer = new StringWriter();
-            PySysIO.ToTextWriter(writer);
+            PySysIO.ToTextWriter(new StringWriter());
+
+            //test
             using (Py.GIL())
             {
-                PythonEngine.RunSimpleString("print('hello pythonnet!')");
+                PythonEngine.RunSimpleString("print('hello TextWriter!')");
             }
+
+            var writer = PySysIO.TextWriter as StringWriter;
             var content = writer.GetStringBuilder().ToString();
+            Console.WriteLine(content);
         }
     }
 }
@@ -29,14 +29,19 @@ def close(self):
 
         private static SysIOWriter SysIOStream = new SysIOWriter();
 
+        public static TextWriter TextWriter
+        {
+            get
+            {
+                return SysIOStream.TextWriter;
+            }
+        }
+
         public static TextWriter ToTextWriter(TextWriter writer = null)
         {
             using (Py.GIL())
             {
-                if(writer != null)
-                {
-                    SysIOStream.TextWriter = writer;
-                }
+                SysIOStream.TextWriter = writer;
                 dynamic sys = Py.Import("sys");
                 sys.stdout = sys.stderr = SysIOStream;
             }
@@ -54,62 +59,48 @@ public static void Flush()
     /// </summary>
     public class SysIOWriter
     {
+        private TextWriter _TextWriter;
         public TextWriter TextWriter
         {
-            get;
-            internal set;
+            get
+            {
+                return _TextWriter == null ? Console.Out : _TextWriter;
+            }
+            set
+            {
+                _TextWriter = value;
+            }
         }
 
         public SysIOWriter(TextWriter writer = null)
         {
-            TextWriter = writer;
+            this._TextWriter = writer;
         }
 
         public void write(String str)
         {
-            str = str.Replace("\n", Environment.NewLine);
-            if (TextWriter != null)
-            {
-                TextWriter.Write(str);
-            }
-            else
-            {
-                Console.Out.Write(str);
-            }
+            //str = str.Replace("\n", Environment.NewLine);
+            this.TextWriter.Write(str);
         }
 
         public void writelines(String[] str)
         {
             foreach (String line in str)
             {
-                if (TextWriter != null)
-                {
-                    TextWriter.Write(str);
-                }
-                else
-                {
-                    Console.Out.Write(str);
-                }
+                this.write(line);
             }
         }
 
         public void flush()
         {
-            if (TextWriter != null)
-            {
-                TextWriter.Flush();
-            }
-            else
-            {
-                Console.Out.Flush();
-            }
+            this.TextWriter.Flush();
         }
 
         public void close()
         {
-            if (TextWriter != null)
+            if (this._TextWriter != null)
             {
-                TextWriter.Close();
+                this._TextWriter.Close();
             }
         }
     }
Original file line number	Diff line number	Diff line change
@@ -10,6 +10,7 @@ class Program
10	10	static int Main(string[] args)
11	11	{
12	12	new TestSysIO().ToConsoleOut();
	13	+ new TestSysIO().ToNullTextWriter();
13	14	new TestSysIO().ToTextWriter();
14	15	//TestMatplotlib.Plot();
15	16	//TestMatplotlib.PlotInWindow();
Original file line number	Diff line number	Diff line change
@@ -1,4 +1,5 @@
1	1	using Python.Runtime;
	2	+ using System;
2	3	using System.IO;
3	4
4	5	namespace Test
@@ -7,25 +8,42 @@ class TestSysIO
7	8	{
8	9	public void ToConsoleOut()
9	10	{
10		- // redirect to Console.Out
	11	+ // redirect to Console.Out, I usually put this at the entrance of a program.
11	12	PySysIO.ToConsoleOut();
	13	+
12	14	//test
13	15	using (Py.GIL())
14	16	{
15		- PythonEngine.RunSimpleString("print('hello pythonnet!')");
	17	+ PythonEngine.RunSimpleString("print('hello ConsoleOut!')");
	18	+ }
	19	+ }
	20	+
	21	+ public void ToNullTextWriter()
	22	+ {
	23	+ // redirect to a TextWriter
	24	+ PySysIO.ToTextWriter();
	25	+
	26	+ //test
	27	+ using (Py.GIL())
	28	+ {
	29	+ PythonEngine.RunSimpleString("print('hello NullTextWriter!')");
16	30	}
17	31	}
18	32
19	33	public void ToTextWriter()
20	34	{
21	35	// redirect to a TextWriter
22		- var writer = new StringWriter();
23		- PySysIO.ToTextWriter(writer);
	36	+ PySysIO.ToTextWriter(new StringWriter());
	37	+
	38	+ //test
24	39	using (Py.GIL())
25	40	{
26		- PythonEngine.RunSimpleString("print('hello pythonnet!')");
	41	+ PythonEngine.RunSimpleString("print('hello TextWriter!')");
27	42	}
	43	+
	44	+ var writer = PySysIO.TextWriter as StringWriter;
28	45	var content = writer.GetStringBuilder().ToString();
	46	+ Console.WriteLine(content);
29	47	}
30	48	}
31	49	}
Original file line number	Diff line number	Diff line change
@@ -29,14 +29,19 @@ def close(self):
29	29
30	30	private static SysIOWriter SysIOStream = new SysIOWriter();
31	31
	32	+ public static TextWriter TextWriter
	33	+ {
	34	+ get
	35	+ {
	36	+ return SysIOStream.TextWriter;
	37	+ }
	38	+ }
	39	+
32	40	public static TextWriter ToTextWriter(TextWriter writer = null)
33	41	{
34	42	using (Py.GIL())
35	43	{
36		- if(writer != null)
37		- {
38		- SysIOStream.TextWriter = writer;
39		- }
	44	+ SysIOStream.TextWriter = writer;
40	45	dynamic sys = Py.Import("sys");
41	46	sys.stdout = sys.stderr = SysIOStream;
42	47	}
@@ -54,62 +59,48 @@ public static void Flush()
54	59	/// </summary>
55	60	public class SysIOWriter
56	61	{
	62	+ private TextWriter _TextWriter;
57	63	public TextWriter TextWriter
58	64	{
59		- get;
60		- internal set;
	65	+ get
	66	+ {
	67	+ return _TextWriter == null ? Console.Out : _TextWriter;
	68	+ }
	69	+ set
	70	+ {
	71	+ _TextWriter = value;
	72	+ }
61	73	}
62	74
63	75	public SysIOWriter(TextWriter writer = null)
64	76	{
65		- TextWriter = writer;
	77	+ this._TextWriter = writer;
66	78	}
67	79
68	80	public void write(String str)
69	81	{
70		- str = str.Replace("\n", Environment.NewLine);
71		- if (TextWriter != null)
72		- {
73		- TextWriter.Write(str);
74		- }
75		- else
76		- {
77		- Console.Out.Write(str);
78		- }
	82	+ //str = str.Replace("\n", Environment.NewLine);
	83	+ this.TextWriter.Write(str);
79	84	}
80	85
81	86	public void writelines(String[] str)
82	87	{
83	88	foreach (String line in str)
84	89	{
85		- if (TextWriter != null)
86		- {
87		- TextWriter.Write(str);
88		- }
89		- else
90		- {
91		- Console.Out.Write(str);
92		- }
	90	+ this.write(line);
93	91	}
94	92	}
95	93
96	94	public void flush()
97	95	{
98		- if (TextWriter != null)
99		- {
100		- TextWriter.Flush();
101		- }
102		- else
103		- {
104		- Console.Out.Flush();
105		- }
	96	+ this.TextWriter.Flush();
106	97	}
107	98
108	99	public void close()
109	100	{
110		- if (TextWriter != null)
	101	+ if (this._TextWriter != null)
111	102	{
112		- TextWriter.Close();
	103	+ this._TextWriter.Close();
113	104	}
114	105	}
115	106	}