added 6 working example used for testing file IO

ports/sh/examples/file/launch_me_first.py

@@ -0,0 +1,3 @@
+f = open("demofile.txt", "w")
+f.write("Hello! Welcome to demofile.txt\nThis file is for testing purposes.\nGood Luck!\n")
+f.close()

ports/sh/examples/file/read1.py

@@ -0,0 +1,4 @@
+f = open("demofile.txt", "r")
+print(f.read())
+f.close()
+

ports/sh/examples/file/read2.py

@@ -0,0 +1,4 @@
+f = open("demofile.txt", "r")
+print(f.read(5))
+f.close()
+

ports/sh/examples/file/test_fileopenread.py

@@ -0,0 +1,9 @@
+f = open("demofile2.txt", "a")
+f.write("Now the file has more content!")
+f.close()
+
+#open and read the file after the appending:
+f = open("demofile2.txt", "r")
+print(f.read())
+f.close()
+

ports/sh/examples/file/write1.py

@@ -0,0 +1,9 @@
+f = open("demofile2.txt", "a")
+f.write("Now the file has more content!")
+f.close()
+
+#open and read the file after the appending:
+f = open("demofile2.txt", "r")
+print(f.read())
+f.close()
+

ports/sh/examples/file/write2.py

@@ -0,0 +1,9 @@
+f = open("demofile3.txt", "w")
+f.write("Woops! I have deleted the content!")
+f.close()
+
+#open and read the file after the overwriting:
+f = open("demofile3.txt", "r")
+print(f.read())
+f.close()
+