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ListComparator-0.1
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مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشترتوضیحات
Compares ordered lists, xml and csv application
| ویژگی | مقدار |
|---|---|
| سیستم عامل | OS Independent |
| نام فایل | ListComparator-0.1 |
| نام | ListComparator |
| نسخه کتابخانه | 0.1 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Nicolas Laurance |
| ایمیل نویسنده | nlaurance at zindep dot com |
| آدرس صفحه اصلی | http://code.google.com/p/listcomparator/ |
| آدرس اینترنتی | https://pypi.org/project/ListComparator/ |
| مجوز | GPL |
.. contents::
Detailed Documentation
**********************
XML and CSV comparisons
=======================
Two scripts are provided xml_cmp and csv_cmp
They both compares 2 files and outputs delta as file_suppr,
file_addon and file_changes
the extension is forced to xml or csv respectively
List comparison
===============
listcomparator provides a Comparator object that allows to find the differences
between two lists **provided the elements of the lists appear in the same order**
>>> old = [1, 2, 3, 4, 5, 6]
>>> new = [1, 3, 4, 7, 6]
>>> from listcomparator.comparator import Comparator
Let's create a Comparator object
>>> comp = Comparator(old,new)
The check method gives values to additions and deletions attributes
>>> comp.check()
>>> comp.additions
[7]
>>> comp.deletions
[2, 5]
We can also use lists of lists
>>> old_list = [['62145', 'azerty'], ['1234', 'qwerty'], ['9876', 'ipsum']]
>>> new_list = [['62145', 'azerty'], ['1234', 'qwertw'], ['4865', 'lorem']]
>>> comp = Comparator(old_list, new_list)
>>> comp.check()
>>> comp.additions
[['1234', 'qwertw'], ['4865', 'lorem']]
>>> comp.deletions
[['1234', 'qwerty'], ['9876', 'ipsum']]
We can have an issue when a modification, in our case "qwerty" became "qwertz",
appears in both outputs, comp.additions and comp.deletions.
You might want to consider this a change.
Comparator can handle this and filter out such cases if you provide a function
that tells Comparator how to recognize such cases
In our example, we consider 2 elements to be the same if the first element of the
list is the same, a kind of id.
>>> def my_key(x):
... return x[0]
...
The getChanges methods then provides a new attribute : changes
>>> comp.getChanges(my_key)
>>> comp.changes
[['1234', 'qwertw']]
of course, additions and deletions stay unchanged
>>> comp.additions
[['1234', 'qwertw'], ['4865', 'lorem']]
>>> comp.deletions
[['1234', 'qwerty'], ['9876', 'ipsum']]
You might want to consider only 'pure' additions and deletions
getChanges allows for a keyword argument 'purge' that does just that
>>> comp.getChanges(my_key, purge=True)
>>> comp.changes
[['1234', 'qwertw']]
>>> comp.additions
[['4865', 'lorem']]
>>> comp.deletions
[['9876', 'ipsum']]
The old and new attributes store the lists to be compared
you might want to reset those, Comparator provides a purgeOldNew method
to clear up memory
>>> comp.old
[['62145', 'azerty'], ['1234', 'qwerty'], ['9876', 'ipsum']]
>>> comp.new
[['62145', 'azerty'], ['1234', 'qwertw'], ['4865', 'lorem']]
>>> comp.purgeOldNew()
>>> comp.old
>>> comp.new
compare XML files
=================
Comparator can be used to compare xml files
let's make two xml files describing books
>>> old='''<?xml version="1.0" ?>
... <infos>
... <book><title>White pages 1995</title>
... <author>
... <surname>La Poste</surname>
... </author>
... <chapter><title>Paris</title>
... <para>ABEL Antoine 82 23 44 12</para>
... <para>ABEL Pierre 82 67 23 12</para>
... </chapter>
... </book>
... <book><title>Yellow pages 2007</title>
... <author>
... <surname>La Poste</surname>
... </author>
... <chapter><title>Bretagne</title>
... <para>Zindep 82 23 44 12</para>
... <para>ZYM 82 67 23 12</para>
... </chapter>
... </book>
... <book><title>Dark pages 2007</title>
... <author>
... <surname>La Poste</surname>
... </author>
... <chapter><title>Greves</title>
... <para>SNCF 82 23 44 12</para>
... </chapter>
... </book>
... </infos>
... '''
>>> new='''<?xml version="1.0"?>
... <infos>
... <book><title>White pages 1995</title>
... <author>
... <surname>La Poste</surname>
... </author>
... <chapter><title>Paris</title>
... <para>ABIL Antoine 82 23 44 12</para>
... <para>ABEL Pierre 82 67 23 12</para>
... </chapter>
... </book>
... <book><title>Yellow pages 2007</title>
... <author>
... <surname>La Poste</surname>
... </author>
... <chapter><title>Bretagne</title>
... <para>Zindep 82 23 44 12</para>
... <para>ZYM 82 67 23 12</para>
... </chapter>
... </book>
... <book><title>Blue pages 2007</title>
... <author>
... <surname>La Poste</surname>
... </author>
... <chapter><title>Bretagne</title>
... <para>Mer 82 23 44 12</para>
... <para>Ciel 82 67 23 12</para>
... </chapter>
... </book>
... </infos>
... '''
elementtree is required to parse xml
>>> from elementtree import ElementTree as ET
for this test we'll use cStringIO rather than a file
>>> import cStringIO
>>> ex_old = cStringIO.StringIO(old)
>>> ex_new = cStringIO.StringIO(new)
we parse contents
>>> root_old = ET.parse(ex_old).getroot()
>>> root_new = ET.parse(ex_new).getroot()
the "book" tag identifies objects we want
>>> objects_old = root_old.findall('book')
>>> objects_new = root_new.findall('book')
as we can't compare 2 objects, we stringify them
>>> objects_old = [ET.tostring(o) for o in objects_old]
>>> objects_new = [ET.tostring(o) for o in objects_new]
from there, Comparator is usefull
>>> my_comp = Comparator(objects_old, objects_new)
>>> my_comp.check()
>>> for e in my_comp.additions:
... print e
...
<book><title>White pages 1995</title>
<author>
<surname>La Poste</surname>
</author>
<chapter><title>Paris</title>
<para>ABIL Antoine 82 23 44 12</para>
<para>ABEL Pierre 82 67 23 12</para>
</chapter>
</book>
<BLANKLINE>
<book><title>Blue pages 2007</title>
<author>
<surname>La Poste</surname>
</author>
<chapter><title>Bretagne</title>
<para>Mer 82 23 44 12</para>
<para>Ciel 82 67 23 12</para>
</chapter>
</book>
<BLANKLINE>
>>> for e in my_comp.deletions:
... print e
...
<book><title>White pages 1995</title>
<author>
<surname>La Poste</surname>
</author>
<chapter><title>Paris</title>
<para>ABEL Antoine 82 23 44 12</para>
<para>ABEL Pierre 82 67 23 12</para>
</chapter>
</book>
<BLANKLINE>
<book><title>Dark pages 2007</title>
<author>
<surname>La Poste</surname>
</author>
<chapter><title>Greves</title>
<para>SNCF 82 23 44 12</para>
</chapter>
</book>
<BLANKLINE>
we need to know wich tag is used to uniquely define an object
here we choose to use the "title" tag
>>> def item_signature(xml_element):
... title = xml_element.find('title')
... return title.text
...
we build our custom function for use by the Comparator
>>> def my_key(str):
... file_like = cStringIO.StringIO(str)
... root = ET.parse(file_like)
... return item_signature(root)
...
then the getChanges method of the Comparator becomes available
>>> my_comp.getChanges(my_key, purge=True)
What books have been exclusively added ?
>>> for e in my_comp.additions:
... print e
...
<book><title>Blue pages 2007</title>
<author>
<surname>La Poste</surname>
</author>
<chapter><title>Bretagne</title>
<para>Mer 82 23 44 12</para>
<para>Ciel 82 67 23 12</para>
</chapter>
</book>
<BLANKLINE>
what books have been exclusively removed ?
>>> for e in my_comp.deletions:
... print e
...
<book><title>Dark pages 2007</title>
<author>
<surname>La Poste</surname>
</author>
<chapter><title>Greves</title>
<para>SNCF 82 23 44 12</para>
</chapter>
</book>
<BLANKLINE>
what books have changed ? that is have same title, but different other values
>>> for e in my_comp.changes:
... print e
...
<book><title>White pages 1995</title>
<author>
<surname>La Poste</surname>
</author>
<chapter><title>Paris</title>
<para>ABIL Antoine 82 23 44 12</para>
<para>ABEL Pierre 82 67 23 12</para>
</chapter>
</book>
<BLANKLINE>
then we can put those results back in xml file
* This code conforms to PEP8
* It is fully tested, 100% coverage
* A Buildbot runs tests at each commit
Contributors
************
Main developpers
================
* Nicolas Laurance <nlaurance at zindep dot com>
with contributions of
---------------------
* Yves Mahe <ymahe at zindep dot com>
Change history
**************
New in 0.1
==========
First Release
نحوه نصب
نصب پکیج whl ListComparator-0.1:
pip install ListComparator-0.1.whl
نصب پکیج tar.gz ListComparator-0.1:
pip install ListComparator-0.1.tar.gz