CODEWITHSUNDEEP
pythonregexvariables
user3461464
user3461464

Reputation: 35

using variables with REGEX in python

I'm trying to search for specific word using python 

f = open("C:\\Users\\Suleiman JK\\Desktop\\keyword.txt")
keyword = f.readlines() -----> keyword[0] = "obj"
file = open ("C:\\Users\\Suleiman JK\\Desktop\\Hello.pdf")
text = file.readlines()


for line in text:
    if re.search (r"\b"+keyword[0]+r"\b"):
        print (line)

it doesn't give me the word I'm looking for

but when I use This it works fine: 

for line in text:                                    
    if re.search (r"\b"+"obj"+r"\b"):
        print (line)

or when I use this it gives me "obj" and "endobj":

for line in text:                                    
    if re.search (keyword[0]):
        print (line)

could any one help me?

Upvotes: 1

Views: 242

Answers (1)

Christian Tapia
Christian Tapia

Reputation: 34146

What happens is that the in reality, the string is:

"obj\n"

the character "\n" is called a new-line character, and it's used to separate lines.

How to "delete" it?

You can use the method rstrip() from strings. This method will return a copy of the string with trailing characters removed. By default it will remove all whitespaces:

keyword[0].rstrip()

So, in your case, you can use it like:

re.search (r"\b" + keyword[0].rstrip() + r"\b")

Upvotes: 1

Related Questions