A list comprehension would work just fine:

    [o.my_attr for o in my_list]

But there is a combination of built-in functions, since you ask :-)

    from operator import attrgetter
    map(attrgetter(&#39;my_attr&#39;), my_list)


are you looking for something like this?

    [o.specific_attr for o in objects]

The first thing that came to my mind:

    attrList = map(lambda x: x.attr, objectList)



Assuming you want field `b` for the objects in a list named `objects` do this: 

    [o.b for o in objects]



I am trying to do a request that accepts a compressed response

    var request = (HttpWebRequest)HttpWebRequest.Create(requestUri);
    request.Headers.Add(HttpRequestHeader.AcceptEncoding, &quot;gzip,deflate&quot;);

I wonder if when I add the second line I will have to handle the decompression manually.

Does .NET&#39;s HttpWebResponse uncompress automatically GZiped and Deflated responses?

Is there a way in PHP to get a list of all sessions (and the variables within each) on the server?

Basically, we have a maintenance function which needs to know which users are currently logged into the site.  We already store data for each user in a session variable, but I am hoping that I can loop through each of these sessions and pluck out the data I need.

MY PHP is very limited (I am a .Net developer ussually) but if anyone knows if this is even possible (and how to do it) I&#39;d be very grateful.  I googled this, and the results I found tended to inidcate that it WASN&#39;T possible, but I find this very hard to accept.

Still, If you can&#39;t you can&#39;t but I thought my buddies on StackOverflow could give me a definitive answer!

Looping Through All a Server&#39;s Sessions in PHP

I have a list of objects. Object has 3 string attributes. I want to make a list containing only a specific attribute from class.

Is there any built-in functions to do that?

How to extract from a list of objects a list of specific attribute?

<p>I have a list of objects. Object has 3 string attributes. I want to make a list containing only a specific attribute from class.</p>
<p>Is there any built-in functions to do that?</p>


How do I get the filename without the extension from a path in Python? 

```
&quot;/path/to/some/file.txt&quot;  →  &quot;file&quot;
```


How do I get the filename without the extension from a path in Python?

Problem: When POSTing data with Python&#39;s urllib2, all data is URL encoded and sent as Content-Type: application/x-www-form-urlencoded.  When uploading files, the Content-Type should instead be set to multipart/form-data and the contents be MIME-encoded.

To get around this limitation some sharp coders created a library called MultipartPostHandler which creates an OpenerDirector you can use with urllib2 to mostly automatically POST with multipart/form-data. A copy of this library is here: [MultipartPostHandler doesn&#39;t work for Unicode files ][1]

I am new to Python and am unable to get this library to work. I wrote out essentially the following code. When I capture it in a local HTTP proxy, I can see that the data is still URL encoded and not multi-part MIME-encoded. Please help me figure out what I am doing wrong or a better way to get this done. Thanks :-)

    FROM_ADDR = &#39;my@email.com&#39;
    
    try:
    	data = open(file, &#39;rb&#39;).read()
    except:
    	print &quot;Error: could not open file %s for reading&quot; % file
    	print &quot;Check permissions on the file or folder it resides in&quot;
    	sys.exit(1)
    
    # Build the POST request
    url = &quot;http://somedomain.com/?action=analyze&quot;		
    post_data = {}
    post_data[&#39;analysisType&#39;] = &#39;file&#39;
    post_data[&#39;executable&#39;] = data
    post_data[&#39;notification&#39;] = &#39;email&#39;
    post_data[&#39;email&#39;] = FROM_ADDR
    
    # MIME encode the POST payload
    opener = urllib2.build_opener(MultipartPostHandler.MultipartPostHandler)
    urllib2.install_opener(opener)
    request = urllib2.Request(url, post_data)
    request.set_proxy(&#39;127.0.0.1:8080&#39;, &#39;http&#39;) # For testing with Burp Proxy
    
    # Make the request and capture the response
    try:
    	response = urllib2.urlopen(request)
    	print response.geturl()
    except urllib2.URLError, e:
    	print &quot;File upload failed...&quot;

EDIT1: Thanks for your response. I&#39;m aware of the ActiveState httplib solution to this (I linked to it above). I&#39;d rather abstract away the problem and use a minimal amount of code to continue using urllib2 how I have been. Any idea why the opener isn&#39;t being installed and used?


  [1]: http://peerit.blogspot.com/2007/07/multipartposthandler-doesnt-work-for.html

Using MultipartPostHandler to POST form-data with Python

How do I create a decorator that applies to classes?

Specifically, I want to use a decorator `addID` to add a member `__id` to a class, and change the constructor `__init__` to take an `id` argument for that member.

    def getId(self): return self.__id

    classdecorator addID(cls):
        def __init__(self, id, *args, **kws):
            self.__id = id
            self.getId = getId
            cls.__init__(self, *args, **kws)

    @addID
    class Foo:
        def __init__(self, value1):
            self.value1 = value1

The above should be equivalent to:

    class Foo:
        def __init__(self, id, value1):
            self.__id = id
            self.value1 = value1

        def getId(self): return self.__id


How to decorate a class?

I&#39;m looking for a Python module that can do simple fuzzy string comparisons.  Specifically, I&#39;d like a percentage of how similar the strings are.  I know this is potentially subjective so I was hoping to find a library that can do positional comparisons as well as longest similar string matches, among other things.

Basically, I&#39;m hoping to find something that is simple enough to yield a single percentage while still configurable enough that I can specify what type of comparison(s) to do.

Good Python modules for fuzzy string comparison?

I can&#39;t find a definitive answer for this. As far as I know, you can&#39;t have multiple `__init__` functions in a Python class. So how do I solve this problem?

Suppose I have a class called `Cheese` with the `number_of_holes` property. How can I have two ways of creating cheese objects...

 1. One that takes a number of holes like this: `parmesan = Cheese(num_holes = 15)`.
 1. And one that takes no arguments and just randomizes the `number_of_holes` property: `gouda = Cheese()`.

I can think of only one way to do this, but this seems clunky:

    class Cheese():
        def __init__(self, num_holes = 0):
            if (num_holes == 0):
                # Randomize number_of_holes
            else:
                number_of_holes = num_holes

What do you say? Is there another way?






Content Type	Original Author	Original Content on Stackoverflow
Question	Janis Veinbergs	View Question on Stackoverflow
Solution 1 - Python	Jarret Hardie	View Answer on Stackoverflow
Solution 2 - Python	SilentGhost	View Answer on Stackoverflow
Solution 3 - Python	Coffee on Mars	View Answer on Stackoverflow
Solution 4 - Python	RossFabricant	View Answer on Stackoverflow

How to extract from a list of objects a list of specific attribute?

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

Solution 3 - Python

Solution 4 - Python

Looping Through All a Server's Sessions in PHP

Does .NET's HttpWebResponse uncompress automatically GZiped and Deflated responses?

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