Re: [Tutor] delete strings from specificed words

[Cameron Simpson]

On 11Jan2018 12:16, YU Bo  wrote:

Hi,


Hi,


On Thu, Jan 11, 2018 at 11:40:35AM +1100, Cameron Simpson wrote:

Do you have the text as above - a single string - or coming from a
file? I'll presume a single string.


En.., the text is  multi-string from str(something) within python.


That's a single string in my thinking.


I would treat the text as lines, particularly since the diff markers
etc are all line oriented.

So you might write something like this:

interesting = []
for line in the_text.splitlines():
 if line.startswith('diff --git '):
   break
 interesting.append(line)

Now the "interesting" list has the lines you want.


Yes, i test your method  and it will come to my intend, but maybe cast
a few of other steps.

I think that the method will offer a similar ways to solve others issues.
I personally like peter's method: text.partition("diff  --git")[0].strip()


Yes, Peter's partition method is very short and direct. Personally I would 
include a leading newline in the string, thus:


 text.partition("\ndiff --git ")

to make it more precise. Consider a patch which discusses your script; its 
comment area might well mention the string "diff --git", as this email does.


What you end up with may depend on what further things you do with the text.

Cheers,
Cameron Simpson 
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Re: [Tutor] delete strings from specificed words

[YU Bo]

Hi,
On Thu, Jan 11, 2018 at 11:40:35AM +1100, Cameron Simpson wrote:

On 09Jan2018 22:20, YU Bo  wrote:

The text i will working as follow:

```text

[...]

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index a789f952b3e9..443892dabedb 100644

[...]

+++ b/tools/perf/util/util.c

[...]

```

[...]


I have tried split(), replace(), but i have no idea to deal with it.


Do you have the text as above - a single string - or coming from a
file? I'll presume a single string.


En.., the text is  multi-string from str(something) within python.



I would treat the text as lines, particularly since the diff markers
etc are all line oriented.

So you might write something like this:

interesting = []
for line in the_text.splitlines():
  if line.startswith('diff --git '):
break
  interesting.append(line)

Now the "interesting" list has the lines you want.


Yes, i test your method  and it will come to my intend, but maybe cast
a few of other steps.

I think that the method will offer a similar ways to solve others issues.
I personally like peter's method: text.partition("diff  --git")[0].strip()

Thanks,
Bo


There's any number of variations on that you might use, but that
should get you going.

Cheers,
Cameron Simpson 

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Re: [Tutor] delete strings from specificed words

[Cameron Simpson]

On 09Jan2018 22:20, YU Bo  wrote:

The text i will working as follow:

```text

[...]

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index a789f952b3e9..443892dabedb 100644

[...]

+++ b/tools/perf/util/util.c

[...]

```
In fact, this is a patch from lkml,my goal is to design a kernel podcast
for myself to focus on what happened in kernel. I have crawled the text
with python and want to remove strings from *diff --git*, because reading
the git commit above, i have a shape in head.

I have tried split(), replace(), but i have no idea to deal with it.


Do you have the text as above - a single string - or coming from a file? I'll 
presume a single string.


I would treat the text as lines, particularly since the diff markers etc are 
all line oriented.


So you might write something like this:

 interesting = []
 for line in the_text.splitlines():
   if line.startswith('diff --git '):
 break
   interesting.append(line)

Now the "interesting" list has the lines you want.

There's any number of variations on that you might use, but that should get you 
going.


Cheers,
Cameron Simpson 
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Re: [Tutor] delete strings from specificed words

[YU Bo]

Hi,
On Wed, Jan 10, 2018 at 10:37:09AM +0100, Peter Otten wrote:

YU Bo wrote:


index 45a63e0..3b9b238 100644
...
```
I want to delete string from *diff --git* to end, because too many code is
here


Use str.split() or str.partition() and only keep the first part:


text = """The registers rax, rcx and rdx are touched when controlling

IBRS
... so they need to be saved when they can't be clobbered.
...
... diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
... index 45a63e0..3b9b238 100644
... """

cleaned_text = text.partition("diff --git")[0].strip()
print(cleaned_text)

The registers rax, rcx and rdx are touched when controlling IBRS
so they need to be saved when they can't be clobbered.


Cool,It is what i want.

Thanks all!

Bo




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Re: [Tutor] delete strings from specificed words

[Peter Otten]

YU Bo wrote:

> ```text
> The registers rax, rcx and rdx are touched when controlling IBRS
> so they need to be saved when they can't be clobbered.
> 
> diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
> index 45a63e0..3b9b238 100644
> ...
> ```
> I want to delete string from *diff --git* to end, because too many code is
> here

Use str.split() or str.partition() and only keep the first part: 

>>> text = """The registers rax, rcx and rdx are touched when controlling 
IBRS
... so they need to be saved when they can't be clobbered.
... 
... diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
... index 45a63e0..3b9b238 100644
... """
>>> cleaned_text = text.partition("diff --git")[0].strip()
>>> print(cleaned_text)
The registers rax, rcx and rdx are touched when controlling IBRS
so they need to be saved when they can't be clobbered.


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Re: [Tutor] delete strings from specificed words

[YU Bo]

Hi,

First, thank you very much for your reply.

On Tue, Jan 09, 2018 at 10:25:11PM +, Alan Gauld via Tutor wrote:

On 09/01/18 14:20, YU Bo wrote:


But, i am facing an interesting question.I have no idea to deal with it.


I don;t think you have given us enough context to
be able to help much. WE would need some idea of
the input and output data (both current and desired)





It sounds like you are building some kind of pretty printer.
Maybe you could use Pythons pretty-print module as a design
template? Or maybe even use some of it directly. It just
depends on your data formats etc.


Yes. I think python can deal with it directly.




In fact, this is a patch from lkml,my goal is to design a kernel podcast
for myself to focus on what happened in kernel.


Sorry, I've no idea what lkml is nor what kernel you are talking about.

Can you show us what you are receiving, what you are
currently producing and what you are trying to produce?

Some actual code might be an idea too.
And the python version and OS.


Sorry, i don't to explain it.But, my code is terribly.

lkml.py:

```code
#!/usr/bin/python
# -*- coding: UTF-8 -*-
# File Name: lkml.py
# Author: Bo Yu

""" This is source code in page that i want to get

"""
import sys
reload(sys)
sys.setdefaultencoding('utf8')

import urllib2
from bs4 import BeautifulSoup
import requests

import chardet
import re

# import myself print function

from get_content import print_content

if __name__ == '__main__':
   comment_url = []
   target = 'https://www.spinics.net/lists/kernel/threads.html'
   req = requests.get(url=target)
   req.encoding = 'utf-8'
   content = req.text
   bf = BeautifulSoup(content ,'lxml') # There is no problem

   context = bf.find_all('strong')
   for ret in context[0:1]:
 for test in ret:
   print '\t'
x = re.split(' ', str(test))
y = re.search('"(.+?)"', str(x)).group(1)
comment_url.append(target.replace("threads.html", str(y)))

   for tmp_target in comment_url:
print "===This is a new file ==="
print_content(tmp_target, 'utf-8', 'title')

```
get_content.py:

```code
#!/usr/bin/python
# -*- coding: UTF-8 -*-
# File Name: get_content.py

import urllib2
from bs4 import BeautifulSoup
import requests

import chardet
import re

def print_content(url, charset, find_id):
   req = requests.get(url=url)
   req.encoding = charset
   content = req.text
   bf = BeautifulSoup(content ,'lxml')
   article_title = bf.find('h1')
   #author = bf.find_all('li')
   commit = bf.find('pre')
   print '\t'
   print article_title.get_text()
   print '\t'
   x = str(commit.get_text())
   print x
```
python --version: Python 2.7.13
OS: debian 9
usage: python lkml.py
output: oh...
https://pastecode.xyz/view/04645424

Please ignore my print debug format.

This is my code and i can get text like output above.
So, simple my quzz:
I dont know how to delete strings after special word, for example:

```text
The registers rax, rcx and rdx are touched when controlling IBRS
so they need to be saved when they can't be clobbered.

diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
index 45a63e0..3b9b238 100644
...
```
I want to delete string from *diff --git* to end, because too many code is here

Whatever, thanks!




--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos


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Re: [Tutor] delete strings from specificed words

[Alan Gauld via Tutor]

On 09/01/18 14:20, YU Bo wrote:

> But, i am facing an interesting question.I have no idea to deal with it.

I don;t think you have given us enough context to
be able to help much. WE would need some idea of
the input and output data (both current and desired)

> [PATCH] perf tools: Fix copyfile_offset update of output offset
> 
> We need to increase output offset in each iteration,
> not decrease it as we currently do.
> 

It sounds like you are building some kind of pretty printer.
Maybe you could use Pythons pretty-print module as a design
template? Or maybe even use some of it directly. It just
depends on your data formats etc.

> In fact, this is a patch from lkml,my goal is to design a kernel podcast
> for myself to focus on what happened in kernel. 

Sorry, I've no idea what lkml is nor what kernel you are talking about.

Can you show us what you are receiving, what you are
currently producing and what you are trying to produce?

Some actual code might be an idea too.
And the python version and OS.

-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos


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