reading file issue

Question

file = open ('G:\\first.txt','r')
print(file.read())
strn = file.read()
print(strn) #This line gives '0' output
file.close()

Answer 1

file.read() exhausts the file iterator, meaning there is nothing left after the first pass of read. Thus you have nothing in strn.

Answer 2

Delete the second line. It's useless.

Answer 3

yes I understood