CODEWITHSUNDEEP
pythonexpressionmultiline
netrate
netrate

Reputation: 443

How can I count how many \n (new lines) using python and regular expressions?

Is there a way to count the number of lines in a set of text? For example:

text="hello what are you"\
"doing with yourself"\
"this weekend?"

I want to count the "\n". I know I could count this using regular python, but just wondering if there is a way to count this with Regular Expressions?

Upvotes: 0

Views: 3945

Answers (3)

LetzerWille
LetzerWille

Reputation: 5658

you can also use enumerate to count the lines in a file as follows:

with open (file, "r") as fp:
    for cnt, _ in enumerate (fp,1):
        pass
    print(cnt)

Upvotes: 1

Yotam Salmon
Yotam Salmon

Reputation: 2411

Side Note

In your case there is no newline in text.

Probably you wanted to define

text = """hello what are you
doing with yourself
this weekend?"""

Answer

You don't need a regular expression.

Just use text.count("\n")~

Edit: Oh, nevermind. You need it to be a regex?

len(re.findall("\n", text)) should work

Upvotes: 2

Robᵩ
Robᵩ

Reputation: 168626

Yes, you can use regular expressions to count newlines.

Run re.findall() and count the results.

len(re.findall('\n', text))

For example, on my Linux computer:

In [5]: with open('/etc/passwd') as fp: text = fp.read()

In [6]: len(re.findall('\n', text))
Out[6]: 56

But really, why would you? As you point out, there are already better ways to do it.

Upvotes: 0

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