Why isn't this code working?

[villandra]

I am a beginner.

The following code prints out lines that begin with From:.

fhand = open('mbox-short.txt')
for line in fhand:
     line = line.rstrip()
     if line (startswith('From:') :
         print(line)

However, this line, which is supposed to only print lines containing the word Horwitz, prints every single line in the file. Why?

If I'm using the wrong term to find a string, what is the correct one?

fhand = open('mbox-short.txt')
for line in fhand :
     if line.find('horwitz') :
          print(line)

Thanks!

Yours,
Dora Smith

[Gribouillis]

Use if line.find('horwitz') != -1: or better if 'horwitz' in line:.

[MckJohan]

its not working because, find() method returns the lowest index of the substring if it is found in given string. If its is not found then it returns -1.

>>> x='012345horwitz678910'
>>> x.find('horwitz')
6
>>> x.find('XXX')
-1
>>> 'horwitz' in x
True
>>>