Re: How to unescape a raw string?
On 05/19/2010 08:34 PM, pyt...@bdurham.com wrote: How can I unescape a raw string so that it behaves as a non-raw string? For example, if I read the string \n\t A B C\ D E F \xa0 \u1234 from a text file, how can I convert (unescape?) this string so that \n, \t, \, \x, and \u get converted to a newline, tab, double quote, hex encoded and unicode encoded chars? I know I can do this explictly via a series of .replace() methods, but certainly there must be a built-in way to do this on a generic basis? Thank you, Malcolm That question makes no sense -- a string is a string is a string in Python. The syntax you use to specify the string (for instance, raw or not, hex characters or not, or one or another quote choice) is irrelevant and completely forgotten once the string is internal. No need to use replace, the \n is already stored as a newline, and the \t as a tab and so on.Various methods of output may or may not convert those characters back into \n and \t and so on. But that's a matter of output not internal storage. So tell us what you're trying to accomplish -- and better also tell us Python2 or Python3? Gary Herron -- http://mail.python.org/mailman/listinfo/python-list
How to unescape a raw string?
How can I unescape a raw string so that it behaves as a non-raw string? For example, if I read the string \n\t A B C\ D E F \xa0 \u1234 from a text file, how can I convert (unescape?) this string so that \n, \t, \, \x, and \u get converted to a newline, tab, double quote, hex encoded and unicode encoded chars? I know I can do this explictly via a series of .replace() methods, but certainly there must be a built-in way to do this on a generic basis? Thank you, Malcolm -- http://mail.python.org/mailman/listinfo/python-list
Re: How to unescape a raw string?
On Wed, May 19, 2010 at 8:34 PM, pyt...@bdurham.com wrote:
How can I unescape a raw string so that it behaves as a non-raw string?
That's not what the notion of raw strings in Python technically means,
but anyway...
For example, if I read the string \n\t A B C\ D E F \xa0 \u1234
I'll assume you're quoting the file contents itself verbatim here,
rather than a Python string literal (which would require doubling up
on the backslashes).
from a
text file, how can I convert (unescape?) this string so that \n, \t, \, \x,
and \u get converted to a newline, tab, double quote, hex encoded and
unicode encoded chars?
I know I can do this explictly via a series of .replace() methods, but
certainly there must be a built-in way to do this on a generic basis?
new_string = your_string.decode('string_escape')
Cheers,
Chris
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Re: How to unescape a raw string?
Hi Chris,
That's not what the notion of raw strings in Python technically means, but
anyway...
Agree - I was having a difficult time trying to describe my dilemma -
thanks for hanging in there with my rather awkward intro :)
I'll assume you're quoting the file contents itself verbatim here, rather
than a Python string literal (which would require doubling up
on the backslashes).
Yes.
new_string = your_string.decode('string_escape')
That's just the clue I needed. The actual decoder I needed turned out to
be 'unicode_escape' because of my embedded \u markup.
new_string = your_string.decode('unicode_escape')
Thank you for your help Chris!
Regards,
Malcolm
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