`logging.warn` has been deprecated since Python 3.3 and you should use `logging.warning`.

Prior to Python 3.3, `logging.warn` and `logging.warning` were the same function, but `logging.warn` was not documented, as noted in a closed issue in the Python bug tracker http://bugs.python.org/issue13235:

&gt; That&#39;s deliberate. The original code (before incorporation into Python) had warn(), which was kept for backward compatibility. The docs refer to warning() because that&#39;s what everyone is supposed to use. The method names map to the lower case of the appropriate logging level name.

`logging.warn()` was kept for backwards compatibility but [a deprecation warning was added](https://github.com/python/cpython/blob/3.3/Lib/logging/__init__.py#L1252-L1253). `logging.warning()` is what everyone is supposed to use.

Prior to Python 3.3, they are the same, however `warn` is deprecated:

    &gt;&gt;&gt; import logging
    &gt;&gt;&gt; logging.warn is logging.warning
    True

Until now, when I wanted to stop the user from pressing the button, I would set the `button.setClickable(false);` and usually change the text to some kind of grey colour (to let the user know that the button is disabled). Today I stumbled upon the `setEnabled()` property.

So I went to the documentation to see the method&#39;s explanation below:

    setEnabled(boolean enabled)
       Set the enabled state of this view.

What does this even mean? What is the difference between enable state/clickable state and disabled state/not clickable state? Could someone please explain what is the difference between doing what I was doing previously, using the clickable property and using the `setEnabled()` property? What should be used when? I searched Stack Overflow but could not find anything related. 


setEnabled() vs setClickable(), what is the difference?

I&#39;m putting values into the hashmap which is of the form,

	Map&lt;Long, Double&gt; highLowValueMap=new HashMap&lt;Long, Double&gt;();
	highLowValueMap.put(1l, 10.0);
	highLowValueMap.put(2l, 20.0);

I want to create a list by using `values()` method of map.

    List&lt;Double&gt; valuesToMatch=new ArrayList&lt;&gt;();
    valuesToMatch=(List&lt;Double&gt;) highLowValueMap.values();
or 

    List&lt;Double&gt; valuesToMatch=(List&lt;Double&gt;) highLowValueMap.values();

However, it throws an exception:

&gt; Exception in thread &quot;main&quot; java.lang.ClassCastException:  
&gt; java.util.HashMap$Values cannot be cast to java.util.List

But it allows me to pass it in to the creation of a list:

    List&lt;Double&gt; valuesToMatch  = new ArrayList&lt;Double&gt;( highLowValueMap.values());



why HashMap Values are not cast in List?

The samples at &lt;http://docs.python.org/2/howto/logging.html&gt; use both `warn` and `warning`.

What&#39;s the difference between logging.warn and logging.warning in Python?

<p>The samples at &#x3C;<a href="http://docs.python.org/2/howto/logging.html" target="_blank" rel="noopener noreferrer">http://docs.python.org/2/howto/logging.html</a>> use both <code>warn</code> and <code>warning</code>.</p>


While this question doesn&#39;t have any real use in practice, I am curious as to how Python does string interning. I have noticed the following.

    &gt;&gt;&gt; &quot;string&quot; is &quot;string&quot;
    True

This is as I expected.

You can also do this.

    &gt;&gt;&gt; &quot;strin&quot;+&quot;g&quot; is &quot;string&quot;
    True

And that&#39;s pretty clever!

But you can&#39;t do this.

    &gt;&gt;&gt; s1 = &quot;strin&quot;
    &gt;&gt;&gt; s2 = &quot;string&quot;
    &gt;&gt;&gt; s1+&quot;g&quot; is s2
    False

Why wouldn&#39;t Python evaluate `s1+&quot;g&quot;`, and realize it is the same as `s2` and point it to the same address? What is actually going on in that last block to have it return `False`?


Python string interning

I&#39;m just starting to use NLTK and I don&#39;t quite understand how to get a list of words from text. If I use `nltk.word_tokenize()`, I get a list of words and punctuation. I need only the words instead. How can I get rid of punctuation? Also `word_tokenize` doesn&#39;t work with multiple sentences: dots are added to the last word.

How to get rid of punctuation using NLTK tokenizer?

Django (1.5) is workin&#39; fine for me, but when I fire up the Python interpreter (Python 3) to check some things, I get the weirdest error when I try importing - `from django.contrib.auth.models import User` - 

    Traceback (most recent call last):
      File &quot;/usr/local/lib/python3.2/dist-packages/django/conf/__init__.py&quot;, line 36, in _setup
        settings_module = os.environ[ENVIRONMENT_VARIABLE]
      File &quot;/usr/lib/python3.2/os.py&quot;, line 450, in __getitem__
        value = self._data[self.encodekey(key)]
    KeyError: b&#39;DJANGO_SETTINGS_MODULE&#39;
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;
      File &quot;/usr/local/lib/python3.2/dist-packages/django/contrib/auth/models.py&quot;, line 8, in &lt;module&gt;
        from django.db import models
      File &quot;/usr/local/lib/python3.2/dist-packages/django/db/__init__.py&quot;, line 11, in &lt;module&gt;
        if settings.DATABASES and DEFAULT_DB_ALIAS not in settings.DATABASES:
      File &quot;/usr/local/lib/python3.2/dist-packages/django/conf/__init__.py&quot;, line 52, in __getattr__
        self._setup(name)
      File &quot;/usr/local/lib/python3.2/dist-packages/django/conf/__init__.py&quot;, line 45, in _setup
        % (desc, ENVIRONMENT_VARIABLE))

    django.core.exceptions.ImproperlyConfigured: Requested setting DATABASES, 
      but settings are not configured. You must either define the environment 
      variable DJANGO_SETTINGS_MODULE or call settings.configure() 
      before accessing settings.

How could it be improperly configured, when it works fine outside the Python interpreter? In my Django settings, the `DATABASES` settings are:


    DATABASES = {
        &#39;default&#39;: {
            &#39;ENGINE&#39;: &#39;django.db.backends.postgresql_psycopg2&#39;, # Add &#39;postgresql_psycopg2&#39;, &#39;mysql&#39;, &#39;sqlite3&#39; or &#39;oracle&#39;.
            &#39;NAME&#39;: &#39;django_db&#39;, # Or path to database file if using sqlite3.
            # The following settings are not used with sqlite3:
            &#39;USER&#39;: &#39;zamphatta&#39;,
            &#39;PASSWORD&#39;: &#39;mypassword91&#39;,
            &#39;HOST&#39;: &#39;&#39;, # Empty for localhost through domain sockets or &#39;127.0.0.1&#39; for localhost through TCP.
            &#39;PORT&#39;: &#39;&#39;, # Set to empty string for default.
        }
    }

...how is this improperly configured?

Django DB Settings &#39;Improperly Configured&#39; Error

I am new to gevents and greenlets. I found some good documentation on how to work with them, but none gave me justification on how and when I should use greenlets!

* What are they really good at?
* Is it a good idea to use them in a proxy server or not?
* Why not threads?

What I am not sure about is how they can provide us with concurrency if they&#39;re basically co-routines.

Greenlet Vs. Threads

I know about `islower` and `isupper`, but can you check whether or not that character is a letter?
For Example:
```python
&gt;&gt;&gt; s = &#39;abcdefg&#39;
&gt;&gt;&gt; s2 = &#39;123abcd&#39;
&gt;&gt;&gt; s3 = &#39;abcDEFG&#39;
&gt;&gt;&gt; s[0].islower()
True

&gt;&gt;&gt; s2[0].islower()
False

&gt;&gt;&gt; s3[0].islower()
True
```

Is there any way to just ask if it is a character besides doing `.islower()` or `.isupper()`?





How can I check if character in a string is a letter? (Python)

I&#39;m trying to use $log.debug(&quot;Foo&quot;).  How can it be turned on off. I can&#39;t find a sample anywhere.  I think it need to be set in the config, but I cant seem to get that to work either.

Where does one set the on and off switch?

How to turn on/off $log.debug in AngularJS

I&#39;m trying a simple console.log function in Firefox:

    console.log(&quot;Hello, World!&quot;);

You may try it on: http://jsfiddle.net/EkZjK/

You may also try the full code in a stand-alone HTML file:

    &lt;html&gt;
        &lt;head&gt;
            &lt;meta content=&quot;text/html;charset=utf-8&quot; http-equiv=&quot;Content-Type&quot;&gt;
            &lt;script type=&quot;text/javascript&quot;&gt;
                console.log(&quot;Hello World !&quot;);
            &lt;/script&gt;
        &lt;/head&gt;
    &lt;/html&gt;

I get console logs in Chrome. &lt;/br&gt;
But in Firefox I cannot see the logs.

I tried the [Firebug][1] console and &lt;kbd&gt;Ctrl&lt;/kbd&gt; + &lt;kbd&gt;Shift&lt;/kbd&gt; + &lt;kbd&gt;J&lt;/kbd&gt;&lt;/br&gt;.
Both don&#39;t show the log message in Firefox.

PS: I restarted Firefox, restarted Windows, tried on another machine, deleted the Firefox profile and created another one, and reinstalled Firefox. But the problem still exists.

How can I solve this?

  [1]: https://en.wikipedia.org/wiki/Firebug_%28software%29


In Firefox, console.log is not showing anything

I have a small python project that has the following structure - 

    Project 
     -- pkg01
       -- test01.py
     -- pkg02
       -- test02.py
     -- logging.conf

 
I plan to use the default logging module to print messages to stdout and a log file.
To use the logging module, some initialization is required - 

    import logging.config
    
    logging.config.fileConfig(&#39;logging.conf&#39;)
    logger = logging.getLogger(&#39;pyApp&#39;)
    
    logger.info(&#39;testing&#39;)

At present, I perform this initialization in every module before I start logging messages. Is it possible to perform this initialization only once in one place such that the same settings are reused by logging all over the project?


Using logging in multiple modules

I have a situation in which I want to write all logs created by me into a text file.

We are using java.util.logging.Logger API to generate the logs.

I tried:

    private static Logger logger = Logger.getLogger(className.class.getName());
    FileHandler fh;   
    fh = new FileHandler(&quot;C:/className.log&quot;);   
    logger.addHandler(fh); 

But still getting my logs on console only.... 

How to write logs in text file when using java.util.logging.Logger

I understand why log4net uses `app.config` files for setting up logging - so you can easily change how information is logged without needing to recompile your code. But in my case I do not want to pack a `app.config` file with my executable. And I have no desire to modify my logging setup.

Is there a way for me to set up logging in code rather than using the `app.config`?

Here is my simple config file:

&lt;!-- language: xml --&gt;

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot; ?&gt;
    &lt;configuration&gt;
      &lt;configSections&gt;
        &lt;section name=&quot;log4net&quot; type=&quot;log4net.Config.Log4NetConfigurationSectionHandler, log4net&quot; /&gt;
      &lt;/configSections&gt;
      &lt;log4net&gt;
        &lt;appender name=&quot;RollingLogFileAppender&quot; type=&quot;log4net.Appender.RollingFileAppender&quot;&gt;
          &lt;file value=&quot;Logs\EventLog.txt&quot; /&gt;
          &lt;appendToFile value=&quot;false&quot; /&gt;
          &lt;rollingStyle value=&quot;Size&quot; /&gt;
          &lt;maxSizeRollBackups value=&quot;5&quot; /&gt;
          &lt;maximumFileSize value=&quot;1GB&quot; /&gt;
          &lt;layout type=&quot;log4net.Layout.PatternLayout&quot;&gt;
            &lt;conversionPattern value=&quot;%date [%thread] %-5level %logger - %message%newline&quot; /&gt;
          &lt;/layout&gt;
        &lt;/appender&gt;
        &lt;appender name=&quot;MemoryAppender&quot; type=&quot;log4net.Appender.MemoryAppender&quot;&gt;
        &lt;/appender&gt;
        &lt;root&gt;
          &lt;level value=&quot;Info&quot; /&gt;
          &lt;appender-ref ref=&quot;RollingLogFileAppender&quot; /&gt;
          &lt;appender-ref ref=&quot;MemoryAppender&quot; /&gt;
        &lt;/root&gt;
      &lt;/log4net&gt;
    &lt;/configuration&gt;

**EDIT:**

To be completely clear: It is my goal to have no XML file. Not even as an embedded resource that I turn into a stream. My goal was to define the logger completely programmatically. Just curious if it&#39;s possible and if so where I might find an example of the syntax.



Can you configure log4net in code instead of using a config file?

I am testing my app that uses `iCloud`. Sometimes, when I fire up the app I get the following warning in the console:

    GEOResourceManifestServerRemoteProxy: Lost connection to geod

Once I get this warning I don&#39;t seem to get any data from `iCloud`. I have tried searching this issue, but have found very little information on it. 

Any suggestions on how one should try to detect this issue and try to handle it?

iCloud and GEOResourceManifestServerRemoteProxy: Lost connection to geod warning

I have to make a Lagrange polynomial in Python for a project I&#39;m doing. I&#39;m doing a barycentric style one to avoid using an explicit for-loop as opposed to a Newton&#39;s divided difference style one. The problem I have is that I need to catch a division by zero, but Python (or maybe numpy) just makes it a warning instead of a normal exception.

So, what I need to know how to do is to catch this warning as if it were an exception. The related questions to this I found on this site were answered not in the way I needed. Here&#39;s my code:

	import numpy as np
	import matplotlib.pyplot as plt
	import warnings

	class Lagrange:
		def __init__(self, xPts, yPts):
			self.xPts = np.array(xPts)
			self.yPts = np.array(yPts)
			self.degree = len(xPts)-1 
			self.weights = np.array([np.product([x_j - x_i for x_j in xPts if x_j != x_i]) for x_i in xPts])
		
		def __call__(self, x):
			warnings.filterwarnings(&quot;error&quot;)
			try:
				bigNumerator = np.product(x - self.xPts)
				numerators = np.array([bigNumerator/(x - x_j) for x_j in self.xPts])
				return sum(numerators/self.weights*self.yPts) 
			except Exception, e: # Catch division by 0. Only possible in &#39;numerators&#39; array
				return yPts[np.where(xPts == x)[0][0]]
			
	L = Lagrange([-1,0,1],[1,0,1]) # Creates quadratic poly L(x) = x^2

	L(1) # This should catch an error, then return 1. 

When this code is executed, the output I get is:

    Warning: divide by zero encountered in int_scalars

That&#39;s the warning I want to catch. It should occur inside the list comprehension.


How do I catch a numpy warning like it&#39;s an exception (not just for testing)?

I have a long R script that throws some warnings, which I can ignore.
I could use 

    suppressWarnings(expr)

for single statements. But how can I suppress warnings in R globally? Is there an option for this?

How to suppress warnings globally in an R Script

I don&#39;t understand why I got this warning message.

    &gt; fixed &lt;- data.frame(&quot;Type&quot; = character(3), &quot;Amount&quot; = numeric(3))
    &gt; fixed[1, ] &lt;- c(&quot;lunch&quot;, 100)
    Warning message:
    In `[&lt;-.factor`(`*tmp*`, iseq, value = &quot;lunch&quot;) :
      invalid factor level, NA generated
    &gt; fixed
      Type Amount
    1 &lt;NA&gt;    100
    2           0
    3           0

Warning message: In `...` : invalid factor level, NA generated

I&#39;m still kinda new with Python, using Pandas, and I&#39;ve got some issues debugging my Python script.

I&#39;ve got the following warning message :

    [...]\pandas\core\index.py:756: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
    return self._engine.get_loc(key)

And can&#39;t find where it&#39;s from.

After some research, I tried to do that in the Pandas lib file (index.py):

    try:
        return self._engine.get_loc(key)
    except UnicodeWarning:
        warnings.warn(&#39;Oh Non&#39;, stacklevel=2)

But that didn&#39;t change anything about the warning message.

Content Type	Original Author	Original Content on Stackoverflow
Question	Tallmad	View Question on Stackoverflow
Solution 1 - Python	siebz0r	View Answer on Stackoverflow
Solution 2 - Python	jamylak	View Answer on Stackoverflow

What's the difference between logging.warn and logging.warning in Python?

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

why HashMap Values are not cast in List?

setEnabled() vs setClickable(), what is the difference?

Attributions