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I am confused about ' and "

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  I am confused about ' and " fl <rxjwg98@gmail.com> - 2014-07-10 10:01 -0700
    Re: I am confused about ' and " John Gordon <gordon@panix.com> - 2014-07-10 17:16 +0000
    Re: I am confused about ' and " Chris Angelico <rosuav@gmail.com> - 2014-07-11 03:57 +1000
    Re: I am confused about ' and " Joel Goldstick <joel.goldstick@gmail.com> - 2014-07-10 14:12 -0400
    Re: I am confused about ' and " Chris “Kwpolska” Warrick <kwpolska@gmail.com> - 2014-07-10 20:25 +0200

#74319 — I am confused about ' and "

Hi,

It is still in the Regular expression operations concept, this link:

has example using single quote mark: '

https://docs.python.org/2/library/re.html#re.split


While in this link:

https://docs.python.org/3/howto/regex.html


It gives table with quote: "

Regular String	Raw string
"ab*"	r"ab*"
"\\\\section"	r"\\section"
"\\w+\\s+\\1"	r"\w+\s+\1"


and link:

https://docs.python.org/2/library/re.html


m = re.match(r"(\w+) (\w+)", "Isaac Newton, physicist")


Please tell me because I have looked it around for one hour about it.

Thanks,

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#74321

In <cfa25009-b200-4fcc-beb7-83634546cd20@googlegroups.com> fl <rxjwg98@gmail.com> writes:

> Please tell me because I have looked it around for one hour about it.

There is no difference between ' and " when used to enclose strings, with
one exception: a double-quoted string can contain single-quotes without the
need to escape them with a backslash, and vice-versa.

For example:

    string2 = "It's a beautiful day in the neighboorhood."
    string1 = 'He said to me, "Hello Thomas."'

-- 
John Gordon         Imagine what it must be like for a real medical doctor to
gordon@panix.com    watch 'House', or a real serial killer to watch 'Dexter'.

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#74326

On Fri, Jul 11, 2014 at 3:01 AM, fl <rxjwg98@gmail.com> wrote:
> Please tell me because I have looked it around for one hour about it.
>

It's high time you started at the beginning, rather than trying to
learn regexps without understanding Python.

https://docs.python.org/3/tutorial/index.html

Start there. You will much better understand Python, and you won't
have to ask for help with these sorts of things.

ChrisA

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#74327

On Thu, Jul 10, 2014 at 1:01 PM, fl <rxjwg98@gmail.com> wrote:
> Hi,
>
> It is still in the Regular expression operations concept, this link:

You must have missed my comment about quote and double quote.  In
python you can write a string using either.  Just make sure if you
start with double quote, you must end with double quote.  Before
tackling regular expressions, go to the python tutorial and learn
about strings.
>
> has example using single quote mark: '
>
> https://docs.python.org/2/library/re.html#re.split
>
>
> While in this link:
>
> https://docs.python.org/3/howto/regex.html
>
>
> It gives table with quote: "
>
> Regular String  Raw string
> "ab*"   r"ab*"
> "\\\\section"   r"\\section"
> "\\w+\\s+\\1"   r"\w+\s+\1"
>
>
> and link:
>
> https://docs.python.org/2/library/re.html
>
>
> m = re.match(r"(\w+) (\w+)", "Isaac Newton, physicist")
>
>
> Please tell me because I have looked it around for one hour about it.
>
> Thanks,
> --
> https://mail.python.org/mailman/listinfo/python-list



-- 
Joel Goldstick
http://joelgoldstick.com

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#74328

On Jul 10, 2014 7:53 PM, "fl" <rxjwg98@gmail.com> wrote:
>
> Hi,
>
> It is still in the Regular expression operations concept, this link:
>
> has example using single quote mark: '
>
> https://docs.python.org/2/library/re.html#re.split
>
>
> While in this link:
>
> https://docs.python.org/3/howto/regex.html
>
>
> It gives table with quote: "
>
> Regular String  Raw string
> "ab*"   r"ab*"
> "\\\\section"   r"\\section"
> "\\w+\\s+\\1"   r"\w+\s+\1"
>
>
> and link:
>
> https://docs.python.org/2/library/re.html
>
>
> m = re.match(r"(\w+) (\w+)", "Isaac Newton, physicist")
>
>
> Please tell me because I have looked it around for one hour about it.
>
> Thanks,
> --
> https://mail.python.org/mailman/listinfo/python-list

Both characters (' and ") are interchangeable, the only difference
being the one you need to escape if you want to use in a string:
"you're" vs 'you\'re', and the other way around.

Also, please read the Python tutorial[0] before getting into bigger
things, and please don’t mix documentation versions.  If you were to
read the tutorial, you’d quickly find out, that

> 3.1.2. Strings
>
> Besides numbers, Python can also manipulate strings, which can be
> expressed in several ways. They can be enclosed in single quotes
> ('...') or double quotes ("...") with the same result [2]. \ can be
> used to escape quotes.
>
> [snip]
>
> [2] Unlike other languages, special characters such as \n have the
> same meaning with both single ('...') and double ("...") quotes.
> The only difference between the two is that within single quotes
> you don’t need to escape "(but you have to escape \') and vice
> versa.


[0]: https://docs.python.org/2/tutorial/index.html

-- 
Chris “Kwpolska” Warrick <http://chriswarrick.com/>
PGP: 5EAAEA16
stop html mail | always bottom-post | only UTF-8 makes sense

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