If you mean the screen where you have that interpreter prompt `&gt;&gt;&gt;` you can do &lt;kbd&gt;CTRL&lt;/kbd&gt;+&lt;kbd&gt;L&lt;/kbd&gt; on Bash shell can help. Windows does not have equivalent. You can do 

    import os
    os.system(&#39;cls&#39;)  # on windows
or

    os.system(&#39;clear&#39;)  # on linux / os x

I have been trying to get the URI path for an asset file. 

    uri = Uri.fromFile(new File(&quot;//assets/mydemo.txt&quot;));

When I check if the file exists I see that file doesn&#39;t exist
                         
   

    File f = new File(filepath);
    if (f.exists() == true) {
        Log.e(TAG, &quot;Valid :&quot; + filepath);
    } else {
        Log.e(TAG, &quot;InValid :&quot; + filepath);
    }

Can some one tell me how I can mention the absolute path for a file existing in the asset folder


How to get URI from an asset File?

How could I determine the number of days between two `NSDate` values (taking into consideration time as well)?

The `NSDate` values are in whatever form `[NSDate date]` takes.

Specifically, when a user enters the inactive state in my iPhone app, I store the following value:

    exitDate = [NSDate date];

And when they open the app back up, I get the current time:

    NSDate *now = [NSDate date];

Now I&#39;d like to implement the following:

    -(int)numberOfDaysBetweenStartDate:exitDate andEndDate:now

Number of days between two NSDates

&gt; **Possible Duplicates:**  
&gt; [clear terminal in python](https://stackoverflow.com/questions/2084508/clear-terminal-in-python)  
&gt; [How to clear python interpreter console?](https://stackoverflow.com/questions/517970/how-to-clear-python-interpreter-console)  

&lt;!-- End of automatically inserted text --&gt;

I&#39;m trying to write a program in Python but I don&#39;t know how to clear the screen.
I use both Windows and Linux and I use commands to clear the screen in those, but I don&#39;t know how to do it in Python.

How do I use Python to clear the screen?


how to clear the screen in python

> Possible Duplicates: 
> <a href="https://stackoverflow.com/questions/2084508/clear-terminal-in-python" target="_blank" rel="noopener noreferrer">clear terminal in python</a> 
> <a href="https://stackoverflow.com/questions/517970/how-to-clear-python-interpreter-console" target="_blank" rel="noopener noreferrer">How to clear python interpreter console?</a>

I'm trying to write a program in Python but I don't know how to clear the screen.
I use both Windows and Linux and I use commands to clear the screen in those, but I don't know how to do it in Python.
How do I use Python to clear the screen?

I often use python to process directories of data. Recently, I have noticed that the default order of the lists has changed to something almost nonsensical. For example, if I am in a current directory containing the following subdirectories: run01, run02, ... run19, run20, and then I generate a list from the following command:

    dir = os.listdir(os.getcwd())

then I usually get a list in this order:

    dir = [&#39;run01&#39;, &#39;run18&#39;, &#39;run14&#39;, &#39;run13&#39;, &#39;run12&#39;, &#39;run11&#39;, &#39;run08&#39;, ... ]

and so on. The order used to be alphanumeric. But this new order has remained with me for a while now.

What is determining the (displayed) order of these lists?

Non-alphanumeric list order from os.listdir()

What is the difference between `subprocess.Popen()` and `os.system()`?

Difference between subprocess.Popen and os.system

I&#39;ve been reading the Python documentation about the subprocess module (see [here][1]) and it talks about a `subprocess.check_output()` command which seems to be exactly what I need.

However, when I try and use it I get an error that it doesn&#39;t exist, and when I run `dir(subprocess)` it is not listed.

I am running Python 2.6.5, and the code I have used is below:

    import subprocess
    subprocess.check_output([&quot;ls&quot;, &quot;-l&quot;, &quot;/dev/null&quot;])

Does anyone have any idea why this is happening?


  [1]: http://docs.python.org/library/subprocess.html#subprocess-replacements

subprocess.check_output() doesn&#39;t seem to exist (Python 2.6.5)

In python, I have to instantiate certain class, knowing its name in a string, but this class &#39;lives&#39; in a dynamically imported module. An example follows:

loader-class script:


    import sys
    class loader:
      def __init__(self, module_name, class_name): # both args are strings
        try:
          __import__(module_name)
          modul = sys.modules[module_name]
          instance = modul.class_name() # obviously this doesn&#39;t works, here is my main problem!
        except ImportError:
           # manage import error



some-dynamically-loaded-module script:

    class myName:
      # etc...

I use this arrangement to make any dynamically-loaded-module to be used by the loader-class following certain predefined behaviours in the dyn-loaded-modules...


Dynamic instantiation from string name of a class in dynamically imported module?

I&#39;ve got a piece of code similar to this:

    import sys
    
    def func1():
    	func2()
    
    def func2():
    	raise Exception(&#39;test error&#39;)
    
    def main():
    	err = None
    
    	try:
    		func1()
    	except:
    		err = sys.exc_info()[1]
    		pass
    	
    	# some extra processing, involving checking err details (if err is not None)
    	
    	# need to re-raise err so caller can do its own handling
    	if err:
    		raise err
    
    if __name__ == &#39;__main__&#39;:
    	main()

When `func2` raises an exception I receive the following traceback:

    Traceback (most recent call last):
      File &quot;err_test.py&quot;, line 25, in &lt;module&gt;
        main()
      File &quot;err_test.py&quot;, line 22, in main
        raise err
    Exception: test error

From here I don&#39;t see where the exception is coming from. The original traceback is lost.

How can I preserve original traceback and re-raise it? I want to see something similar to this:

    Traceback (most recent call last):
      File &quot;err_test.py&quot;, line 26, in &lt;module&gt;
        main()
      File &quot;err_test.py&quot;, line 13, in main
        func1()
      File &quot;err_test.py&quot;, line 4, in func1
        func2()
      File &quot;err_test.py&quot;, line 7, in func2
        raise Exception(&#39;test error&#39;)
    Exception: test error

Exception traceback is hidden if not re-raised immediately

I&#39;m trying to force the &quot;portrait&quot; mode for my application because my application is absolutely not designed for the &quot;landscape&quot; mode.

After reading some forums, I added these lines in my manifest file:

    &lt;application 
      android:debuggable=&quot;true&quot;
      android:icon=&quot;@drawable/icon&quot; 
      android:label=&quot;@string/app_name&quot;
      android:screenOrientation=&quot;portrait&quot;&gt;

But it doesn&#39;t work on my device (HTC Desire). It switches from &quot;portrait&quot; lo &quot;landscape&quot;, ignoring the lines from the manifest file.

After more forums reading, I tried to add this in my manifest file:

    &lt;application 
      android:debuggable=&quot;true&quot;
      android:icon=&quot;@drawable/icon&quot; 
      android:label=&quot;@string/app_name&quot;
      android:configChanges=&quot;orientation&quot;    	
      android:screenOrientation=&quot;portrait&quot;&gt;

and this function in my activity class:

    public void onConfigurationChanged(Configuration newConfig)
    {
        super.onConfigurationChanged(newConfig);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }

But again, no luck.

Force &quot;portrait&quot; orientation mode

I have emacs split horizontally - on top I&#39;m editing Perl code, the bottom is the shell. By default emacs makes the two windows equal in size, but I&#39;d like the shell buffer smaller (maybe half the size?). I was wondering how I could do that.

How to change size of split screen emacs windows?

Is there any way to determine the category of screen size of the current device, such as small, normal, large, xlarge?

Not the density, but the screen size.

How to determine device screen size category (small, normal, large, xlarge) using code?

How can I collect and change screen resolution using Visual C#?

Get and Set Screen Resolution

I want to check this to fetch different images by internet. How to do that?

Content Type	Original Author	Original Content on Stackoverflow
Question	shiester	View Question on Stackoverflow
Solution 1 - Python	Senthil Kumaran	View Answer on Stackoverflow

how to clear the screen in python

Python Problem Overview

Python Solutions

Solution 1 - Python

Number of days between two NSDates

How to get URI from an asset File?

Attributions