CODEWITHSUNDEEP
pythonstring
Ram Rachum
Ram Rachum

Reputation: 88738

How does Python's triple-quote string work?

How should this function be changed to return "123456"?

def f():
    s = """123
    456"""
    return s

UPDATE: Everyone, the question is about understanding how to not have \t or whatever when having a multiline comment, not how to use the re module.

Upvotes: 34

Views: 43624

Answers (9)

Rishi
Rishi

Reputation: 6199

You might want to check this str.splitlines([keepends])

Return a list of the lines in the string, breaking at line boundaries. This method uses the universal newlines approach to splitting lines. Line breaks are not included in the resulting list unless keepends is given and true.

Python recognizes "\r", "\n", and "\r\n" as line boundaries for 8-bit strings.

So, for the problem at hand ... we could do somehting like this..

>>> s = """123
... 456"""
>>> s
'123\n456'
>>> ''.join(s.splitlines())
'123456'

Upvotes: 0

claudelepoisson
claudelepoisson

Reputation: 121

textwrap.dedent("""\
                123
                456""")

From the standard library. First "\" is necessary because this function works by removing the common leading whitespace.

Upvotes: 12

Juparave
Juparave

Reputation: 706

My guess is:

def f():
    s = """123
    456"""
    return u'123456'

Minimum change and does what is asked for.

Upvotes: -3

nosklo
nosklo

Reputation: 223172

Don't use a triple-quoted string when you don't want extra whitespace, tabs and newlines.

Use implicit continuation, it's more elegant:

def f():
    s = ('123'
         '456')
    return s

Upvotes: 55

Denis Otkidach
Denis Otkidach

Reputation: 33250

Subsequent strings are concatenated, so you can use:

def f():
    s = ("123"
         "456")
    return s

This will allow you to keep indention as you like.

Upvotes: 16

Slumberheart
Slumberheart

Reputation: 239

def f():
  s = """123\
456"""
  return s

Don't indent any of the blockquote lines after the first line; end every line except the last with a backslash.

Upvotes: 21

Aaron Digulla
Aaron Digulla

Reputation: 328860

Try

import re

and then

    return re.sub("\s+", "", s)

Upvotes: -1

SilentGhost
SilentGhost

Reputation: 320039

re.sub('\D+', '', s)

will return a string, if you want an integer, convert this string with int.

Upvotes: -1

Joachim Sauer
Joachim Sauer

Reputation: 308269

Maybe I'm missing something obvious but what about this:

def f():
    s = """123456"""
    return s

or simply this:

def f():
    s = "123456"
    return s

or even simpler:

def f():
    return "123456"

If that doesn't answer your question, then please clarify what the question is about.

Upvotes: 7

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