CODEWITHSUNDEEP
python
user1780454
user1780454

Reputation: 1

Read specfic character from line in Text File(Python)

char1= "P"
length=5
f = open("wl.txt", 'r')

for line in f:
if len(line)==length and line.rstrip() == char1:
   z=Counter(line)
   print z

I want to output only lines where length=5 and contains character p.So far

  f = open("wl.txt", 'r')
    for line in f:
    if len(line)==length :#This one only works with the length
      z=Counter(line)
      print z

Any guess someone?

Upvotes: 0

Views: 130

Answers (1)

Jon Clements
Jon Clements

Reputation: 142216

Your problem is:

if len(line)==length and line.rstrip() == char1:

If a line is 5 characters long, then after removing trailing whitespace, you're then comparing to see if it's equal to a string of length 1... 'abcde' is never going to equal 'p' for instance, and your check will never run if your line contains 'p' as it's not 5 characters...

I'm not sure what you're trying to do with Counter

Corrected code is:

# note in capitals to indicate 'constants'
LENGTH = 5
CHAR = 'p'

with open('wl.txt') as fin:
    for line in fin:
        # Check length *after* any trailing whitespace has been removed
        # and that CHAR appears anywhere **in** the line
        if len(line.rstrip()) == LENGTH and CHAR in line:
            print 'match:', line

Upvotes: 5

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