feat(examples): file system

Author: ashegde

codes/session_5/hello.txt

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+Hello World!
+My name is Ashwin Hegde, I work as a Software Engineer
+My primary language is JavaScript and Secondary language is Python
+Python is needed for scripting, Machine Learning and Quantum Programming

codes/session_5/read.py

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+# Open terminal > python3 read.py
+# Start typing below commands and see the output
+
+with open('hello.txt') as f:
+  data = f.read()
+  print(data)
+f.closed

codes/session_5/readline.py

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+# Open terminal > python3 readline.py
+# Start typing below commands and see the output
+
+f = open('hello.txt', 'r')
+print(f.readline())
+print(f.readline())
+print(f.readline())
+

codes/session_5/sample.txt

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+Hello World! My name is Ashwin

codes/session_5/seekTell.py

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+# Open terminal > python3 seekTell.py
+# Start typing below commands and see the output
+
+f = open('sample.txt', 'r')
+
+f.seek(8, 0) # 0 mean beginning of the file
+print(f.read())
+
+print('\n\n')
+
+# f.seek(8, 1) # 1 mean current position
+# print(f.read())
+
+# print('\n\n')
+
+# f.seek(-3, 2) # 2 mean end of the file
+# print(f.read())
+

codes/session_5/write.py

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+# Open terminal > python3 write.py
+# Start typing below commands and see the output
+
+fw = open('hello.txt', 'a')
+totalWrittenChar = fw.write('\nPython is needed for scripting, Machine Learning and Quantum Programming')
+print('Total written characters are ' + repr(totalWrittenChar))
+fw.close()
+
+with open('hello.txt') as fr:
+  data = fr.read()
+  print(data)
+fr.close()