a.txt contains
a1
a2
a3
read() example: f = open('a.txt','r')
print f.read()
f.close()
Output:
a1
a2
a3
readline() example:f = open('a.txt','r')
print f.readline()
f.close()
Output:
a1
readlines() example:f = open('a.txt','r')
print f.readlines()
f.close()
Output:
['a1\n', 'a2\n', 'a3\n']
