** read text file in python
capability: reading =text= from a text file
1. open the IDLE text editor
>>> idle3
2. declare a *string* variable that holds *the path to the text file*, =test.txt=
>>> strPath="/home/kaiming/Documents/Python/text/text.dat"
3. open the file using the =open()= function
>>> f=open(strPath)
4. Read the contents of the file using the =read()= function
>>> StrText=f.read()
5. Print out the contents of the file
>>> print(strText)
refer to
https://docs.python.org/2/tutorial/inputoutput.html
