从python 3.3中的文本文件读取多个变量？

Question

I have a text file in the same directory labelled test.txt. It contains the following 3 lines:

10
3
5

The output this gives me is:

1
0

3

My code is below.

f = open('test.txt',"r")
test1 =(f.readline(1))
test2 = (f.readline(2))
test3 = (f.readline(3))
print (test1)
print (test2)
print (test3)

How would i go about making it pick up the full variables? Ie test1 = 10, test2=3, test3 = 5? Very new to python :(

Answer 1

You don't have to give f.readline() an argument at all:

test1 = f.readline()
test2 = f.readline()
test3 = f.readline()

otherwise you limit the number of characters read. f.readline(1) does not mean 'read line 1'; instead you say: 'read a line, but no more than 1 character should be read'.

Quoting from the IOBase.readline() docs :

Read and return one line from the stream. If size is specified, at most size bytes will be read.

Emphasis mine.