Hi,
I have to read some data from a file, and on each block it always
appears the followng string; xyz.vs.1-81_1 . It appears a lot of time
with different numbers like;
xyz.vs.1-81_1
xyz.vs.1-1234_1
xyz.vs.1-56431_1
and so on
My problem is that I need to extract from this string the number. For
instance in xyz.vs.1-81_1 I have to extract the number 81, and in
xyz.vs.1-1234_1 I need to get the number 1234.
What is the easiest way of doing this ?
Thanks 4 2595
Horacius ReX wrote:
>Hi,
I have to read some data from a file, and on each block it always appears the followng string; xyz.vs.1-81_1 . It appears a lot of time with different numbers like;
xyz.vs.1-81_1 xyz.vs.1-1234_1 xyz.vs.1-56431_1
and so on
My problem is that I need to extract from this string the number. For instance in xyz.vs.1-81_1 I have to extract the number 81, and in xyz.vs.1-1234_1 I need to get the number 1234.
What is the easiest way of doing this ?
Thanks
If the strings looks *allways* that way, so its not to complicated:
>>number_regex = re.compile('-(\d+)_') print number_regex.search('xyz.vs.1-1234_1').group(1)
1234
>>print number_regex.search('xyz.vs.1-56431_1').group(1)
56431
Horacius ReX a écrit :
Hi,
I have to read some data from a file, and on each block it always
appears the followng string; xyz.vs.1-81_1 . It appears a lot of time
with different numbers like;
xyz.vs.1-81_1
xyz.vs.1-1234_1
xyz.vs.1-56431_1
and so on
My problem is that I need to extract from this string the number. For
instance in xyz.vs.1-81_1 I have to extract the number 81, and in
xyz.vs.1-1234_1 I need to get the number 1234.
What is the easiest way of doing this ?
Not necessarily the "easiest", but:
>>data = ['xyz.vs.1-81_1', 'xyz.vs.1-1234_1', 'xyz.vs.1-56431_1'] for d in data:
.... print d, ":", d.split('.')[2].split('-')[1].split('_')[0]
....
xyz.vs.1-81_1 : 81
xyz.vs.1-1234_1 : 1234
xyz.vs.1-56431_1 : 56431
On 2007-12-21, Horacius ReX <ho**********@gmail.comwrote:
Hi,
I have to read some data from a file, and on each block it always
appears the followng string; xyz.vs.1-81_1 . It appears a lot of time
with different numbers like;
xyz.vs.1-81_1
xyz.vs.1-1234_1
xyz.vs.1-56431_1
and so on
My problem is that I need to extract from this string the number. For
instance in xyz.vs.1-81_1 I have to extract the number 81, and in
xyz.vs.1-1234_1 I need to get the number 1234.
What is the easiest way of doing this ?
Using a regular expression would be quick if you know how.
Or use str.find and slicing.
--
Neil Cerutti
Gerardo Herzig <gh*****@fmed.uba.arwrote:
>>My problem is that I need to extract from this string the number. For instance in xyz.vs.1-81_1 I have to extract the number 81, and in xyz.vs.1-1234_1 I need to get the number 1234.
What is the easiest way of doing this ?
If the strings looks *allways* that way, so its not to complicated:
>number_regex = re.compile('-(\d+)_')
[ ... ]
If the strings always look *exactly* like that, a regex is a massive
overkill:
>>examples = 'xyz.vs.1-81_1', 'xyz.vs.1-1234_1', 'xyz.vs.1-56431_1' [ int(x[9:-2]) for x in examples ]
[81, 1234, 56431]
If the "xyz.vs.1" and trailing "1" are a bit more variable, then a
regex is still massive overkill:
>>[ int(x[x.index('-')+1:x.rindex('_')]) for x in examples ]
[81, 1234, 56431]
--
\S -- si***@chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
"Frankly I have no feelings towards penguins one way or the other"
-- Arthur C. Clarke
her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: William Payne |
last post by:
Hello, I have a variable of type unsigned long. It has a number of bits set
(with set I mean they equal one). I need to determine those bits and their
position and create new numbers from them. For...
|
by: chuck |
last post by:
Hello,
I am trying to figure out how to get a number (always an int) from a
string.
so if i have something like
<input type="text" id="product13" name="product13" onblur="return...
|
by: Sharon |
last post by:
hi,
I want to extract a string from a file,
if the file is like this:
1 This is the string 2 3 4
how could I extract the string, starting from the 10th position (i.e. "T")
and...
|
by: Adam Faulkner via DotNetMonster.com |
last post by:
I want to create a method within a class that opens a Microsoft Word 2000
Document and has the facility to Create a new word document and then extract
a Page that exists within the original Word...
|
by: Dave |
last post by:
Hope someone can help!
I have a memo fiels in which there are a few numbers including dates but
what I want to do is extract a number which is 6 figures long. Can anyone
help me?
Thanks Dave
|
by: napolpie |
last post by:
DISCUSSION IN
USER nappie writes:
Hello, I'm Peter and I'm new in python codying and I'm using parsying
to extract data from one meteo Arpege file. This file is long file and
it's composed by...
|
by: Lyosha |
last post by:
Converting binary to base 10 is easy:
255
Converting base 10 number to hex or octal is easy:
'0144'
'0x64'
Is there an *easy* way to convert a number to binary?
|
by: JoeC |
last post by:
I am trying to create a windows program that reads binary graphics as
a resource. This has nothing to do with win32 but conversion of data
with memcpy.
graphic::graphic(UINT uiResID, HINSTANCE...
|
by: Steve |
last post by:
Hi all
Does anybody please know a way to extract an Image from a pdf file and save
it as a TIFF?
I have used a scanner to scan documents which are then placed on a server,
but I need to...
|
by: DolphinDB |
last post by:
Tired of spending countless mintues downsampling your data? Look no further!
In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
|
by: ryjfgjl |
last post by:
ExcelToDatabase: batch import excel into database automatically...
|
by: isladogs |
last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM).
In this month's session, we are pleased to welcome back...
|
by: ArrayDB |
last post by:
The error message I've encountered is; ERROR:root:Error generating model response: exception: access violation writing 0x0000000000005140, which seems to be indicative of an access violation...
|
by: Defcon1945 |
last post by:
I'm trying to learn Python using Pycharm but import shutil doesn't work
|
by: Shællîpôpï 09 |
last post by:
If u are using a keypad phone, how do u turn on JavaScript, to access features like WhatsApp, Facebook, Instagram....
|
by: af34tf |
last post by:
Hi Guys, I have a domain whose name is BytesLimited.com, and I want to sell it. Does anyone know about platforms that allow me to list my domain in auction for free. Thank you
|
by: Faith0G |
last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 3 Apr 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome former...
| |