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in Python 2.7.11 version .

1. Program to obtain numbers from user and store it in a list. 

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a='' list=[] while a!='done': a=raw_input('Enter a number: ') if a!='done': list.append(a) print'List =',list

output:  
Enter a number:  2
Enter a number:  5
Enter a number:  6
Enter a number:  4
Enter a number:  done
List = ['2', '5', '6', '4']

2. Program to open a Text file and print data as output.
    (Hint: if text file is not present at Python folder input the path along with file name)

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var1=raw_input('Enter the file name: ') f=open(var1,'r') print f.read()

output:
Enter the file name:

3.