Python中的Elif条件

Question

I have some Python code which needs to take a string input from a text file named varfile.txt and conditions to be applied on that data and print the output. The code is as follows:

file = open("varfile.txt", "r")
lines = file.readlines()
e= str(lines[1]);
print(e)
if  e == '<0.1%':
        print("1")
elif  e == '(0.1-25)%':
        print("2")
elif  e == '(0.25-0.5)%':
        print("3")
elif  e == '(0.5-1)%':
        print("4")
elif  e == '>1%':
        print("5")
else:
        print("0")

The ouput is as follows:

(0.25-0.5)%  
0

Even though e value is printed as (0.25-0.5)% , it is not comparing with the condition in the elif clause and giving 0 as an output though the output should be 3 . Could you please suggest where I am going wrong?

Answer 1

According to this tutorial files.readlines() does not strip the ending new line characters from the ends of the lines.

You can use e.strip('\\n') to return a string with newlines removed, eg:

e = e.strip('\n')
if e == ...:
elif ...

Answer 2

readlines 包含换行符 。