Evaluation of IF statement in Python

Question

Please help me try to understand the evaluation of this script. It must be something simple I'm not understanding. I want to scan a text file and output lines with specific string value.

So for example my txt file will contain simple stuff:

beep
boop 
bop 
Hey 
beep
boop
bop

and the script is looking for the line with "Hey" and trying to output that line

file_path = "C:\\downloads\\test.txt"
i = 0
file_in = open(file_path,"r+") # read & write
for lines in file_in.readlines():
    i+=1
    #if lines.rfind("this entity will be skipped..."):
    if lines.find("Hey"):
        print(i, lines)
file_in.close()

For some reason it outputs every line except the one it found a match on. How is this possible?

Answer 1

It's probably more straightforward to do if "Hey" in lines: instead of if lines.find("Hey"):. If you really want to use find(), you could do this: if lines.find("Hey") != -1: