Specify the keyword argument `origin=&#39;lower&#39;` or `origin=&#39;upper&#39;` in your call to `imshow`.

You can use the `extent` argument. For example, if X values range from -10 and 10 and Y values range from -5 to 5, you should pass `extent=(-10,10,-5,5)` to `imshow()`.

Use `ax.invert_yaxis()` to invert the y-axis, or `ax.invert_xaxis()` to invert the x-axis.

add .T after the data you want to plot

    plt.imshow(data.T)

This will &quot;transpose&quot; the data

Is there a way to write an IF &lt;condition&gt; OR IF &lt;condition&gt; conditional statement in a windows batch-file? 

For example:

    IF [%var%] == [1] OR IF [%var%] == [2] ECHO TRUE

IF... OR IF... in a windows batch file

When my PowerShell script tries, for example, to create a SQL Server object for a server that doesn&#39;t exist (&quot;bla&quot; in my case), PowerShell displays lots of PowerShell errors in red.

Since my script checks the value of `$?` after such calls, and displays and logs errors, I&#39;d rather not have the several lines of PowerShell errors displayed as well.

How can I deactivate those being displayed for my script?

Powershell: How can I stop errors from being displayed in a script?

I wanted the `imshow()` function in `matplotlib.pyplot` to display images the opposite way, i.e upside down. Is there a simple way to do this? 

Invert image displayed by imshow in matplotlib

<p>I wanted the <code>imshow()</code> function in <code>matplotlib.pyplot</code> to display images the opposite way, i.e upside down. Is there a simple way to do this?</p>


When initializing a dictionary with `d = {}` Pycharm&#39;s code inspector generates a warning, saying

&gt; This dictionary creation could be rewritten as a dictionary literal.

If I rewrite it `d = dict()` the warning goes away. Since `{}` already *is* a dictionary literal, I&#39;m pretty sure the message is erroneous. Furthermore, it seems like both `d = {}` and `d = dict()` are valid and Pythonic. 

This related question seems to conclude that the choice is just a matter of style/preference:
https://stackoverflow.com/questions/2745008/differences-between-d-dict-and-d

Why would Pycharm complain about `d = {}`?

*UPDATE:*

Mac nailed it. The warning actually applied to multiple lines, not just the one that was flagged.

Pycharm seems to look for a sequence of consecutive statements where you initialize a dictionary and then set values in the dictionary. For example, this will trigger the warning:

    d = {}
    d[&#39;a&#39;] = 1

But this code will not:

    d = {}
    pass
    d[&#39;a&#39;] = 1

Why does Pycharm&#39;s inspector complain about &quot;d = {}&quot;?

I have changed the name of an app in Django by renaming its folder, imports and all its references (templates/indexes). But now I get this error when I try to run `python manage.py runserver`

    Error: Could not import settings &#39;nameofmynewapp.settings&#39; (Is it on sys.path?): No module named settings

How can I debug and solve this error? Any clues?

How to change the name of a Django app?

I have used Matplotlib to plot lines on a figure. Now I would now like to set the style, specifically the marker, for individual points on the line. How do I do this?

To clarify my question, I want to be able to set the style for individual markers on a line, not every marker on said line.

Set markers for individual points on a line in Matplotlib

I am trying to run the code presented on the second page:

http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00-introduction-to-computer-science-and-programming-fall-2008/video-lectures/lecture-20/lec20.pdf

At the bottom of the code you have to add these lines:

    simFlips(100,100)
    
    show()


Here is the error that I get when I run it on ubuntu:

    Traceback (most recent call last):
      File &quot;coin.py&quot;, line 36, in &lt;module&gt;
        simFlips(100,100)
      File &quot;coin.py&quot;, line 16, in simFlips
        diffs.append(abs(heads - tails))
    AttributeError: &#39;numpy.ndarray&#39; object has no attribute &#39;append&#39;

Please tell me what I&#39;m doing wrong that gives me the last error.  Thanks in advance!

AttributeError: &#39;numpy.ndarray&#39; object has no attribute &#39;append&#39;

I am finding that I am using plenty of context managers in Python. However, I have been testing a number of things using them, and I am often needing the following:

    class MyTestCase(unittest.TestCase):
      def testFirstThing(self):
        with GetResource() as resource:
          u = UnderTest(resource)
          u.doStuff()
          self.assertEqual(u.getSomething(), &#39;a value&#39;)

      def testSecondThing(self):
        with GetResource() as resource:
          u = UnderTest(resource)
          u.doOtherStuff()
          self.assertEqual(u.getSomething(), &#39;a value&#39;)

When this gets to many tests, this is clearly going to get boring, so in the spirit of SPOT/DRY (single point of truth/dont repeat yourself), I&#39;d want to refactor those bits into the test `setUp()` and `tearDown()` methods.

However, trying to do that has lead to this ugliness:

      def setUp(self):
        self._resource = GetSlot()
        self._resource.__enter__()
    
      def tearDown(self):
        self._resource.__exit__(None, None, None)

There must be a better way to do this. Ideally, in the `setUp()`/`tearDown()` without repetitive bits for each test method (I can see how repeating a decorator on each method could do it).

**Edit:** Consider the undertest object to be internal, and the `GetResource` object to be a third party thing (which we aren&#39;t changing).

I&#39;ve renamed `GetSlot` to `GetResource` here—this is more general than specific case—where context managers are the way which the object is intended to go into a locked state and out.

In python, is there a good idiom for using context managers in setup/teardown

I am trying to resize an img with a percentage of itself. For example, I just want to shrink the image by half by resizing it to 50%. But applying `width: 50%;` will resize the image to be 50% of the container element (the parent element which maybe the `&lt;body&gt;` for example). 

Question is, can I resize the image with a percentage of itself without using javascript or server side? (I have no direct information of the image size) 

I am pretty sure you cannot do this, but I just want to see whether there are intelligent CSS only solution. Thanks!

CSS image resize percentage of itself?

I have to implement image zooming, I have tried with so many codes.But i didnt get full idea of gesture events. I want to implement when we apply double tap, image will be zooming according to the touch place(event x and y).I have to implement only zooming at this time no pan.Can any body suggest me ? 

Edit: 
    Actually i have implemented that viewflipper with images, if i try to apply pan and zoom effect, sometimes images will be changed.**I want to implement zoom effect for where the user is clicked**.

Give me some idea of that....

How to implement zoom effect for image view in android?

I&#39;m having trouble displaying a Base64 image inline.

How can I do it?

    &lt;!DOCTYPE html&gt;
    &lt;html&gt;
      &lt;head&gt;
        &lt;title&gt;Display Image&lt;/title&gt;
      &lt;/head&gt;
      &lt;body&gt;
        &lt;img style=&#39;display:block; width:100px;height:100px;&#39; id=&#39;base64image&#39;
           src=&#39;data:image/jpeg;base64, LzlqLzRBQ... &lt;!-- Base64 data --&gt;&#39; /&gt;
      &lt;/body&gt;
    &lt;/html&gt;



How to display Base64 images in HTML

I spent quite some time researching for a library that allows me to compare images to one another in Java.

I didn&#39;t really find anything useful, maybe my GoogleSearch-skill isn&#39;t high enough so I thought I&#39;d ask you guys if you could point me into a direction of where I could find something like this.

Basically what I want to do is to compare two images with each other and get a value of how much the two are similar. Like a percentage or so.

I hope you guys have something I can use, I wouldn&#39;t know how to write something like that myself...

PS: It doesn&#39;t necessarily has to be in Java, that&#39;s just the environment my app will be running.

Java library to compare image similarity

I&#39;m trying to display a png image on a `&lt;button&gt;` element in HTML.
The button is the same size as the image, and the image is shown but for some reason not in the center - so it&#39;s impossible to see it all.
In other words it seems like the top right corner of the image is located at the center of the button and not at the top right corner of the button.

This is the HTML code:

    &lt;button id=&quot;close&quot; class=&quot;closing&quot; onClick=&quot;javascript:close_clip()&quot;&gt;&lt;img src=&quot;icons/close.png&quot; /&gt;&lt;/button&gt;


Update:  
What actually happens, I think, is a margin problem. I get a two pixel margin, so the background image is going out of the button. The button and the image are the same size, which is only `20px`, so it&#39;s very noticable...  I tried `margin:0`, `padding:0`, but it didn&#39;t help...

Embed image in a &lt;button&gt; element

How can I put text in the top left (or top right) corner of a matplotlib figure, e.g. where a top left legend would be, or on top of the plot but in the top left corner?  E.g. if it&#39;s a plt.scatter(), then something that would be within the square of the scatter, put in the top left most corner.

I&#39;d like to do this without ideally knowing the scale of the scatterplot being plotted for example, since it will change from dataset to data set.  I just want it the text to be roughly in the upper left, or roughly in the upper right. With legend type positioning it should not overlap with any scatter plot points anyway.

thanks!

Putting text in top left corner of matplotlib plot

To state it in a general form, I&#39;m looking for a way to join several points with a **gradient color line** using **matplotlib**, and I&#39;m not finding it anywhere.
To be more specific, I&#39;m plotting a 2D random walk with a one color line. But, as the points have a relevant sequence, I would like to look at the plot and see where the data has moved. A gradient colored line would do the trick. Or a line with gradually changing transparency.

I&#39;m just trying to improve the vizualization of my data. Check out this beautiful image produced by the ggplot2 package of R. I&#39;m looking for the same in matplotlib. Thanks.

![enter image description here][1]


  [1]: http://i.stack.imgur.com/7sNmT.png

How to plot a gradient color line in matplotlib?

I am sure the configuration of `matplotlib` for python is correct since I have used it to plot some figures.

But today it just stop working for some reason. I tested it with really simple code like:

    import matplotlib.pyplot as plt
    import numpy as np
    x = np.arange(0, 5, 0.1)
    y = np.sin(x)
    plt.plot(x, y)

There&#39;s no error but just no figure shown up. 

I am using python 2.6, Eclipse in Ubuntu
   



Content Type	Original Author	Original Content on Stackoverflow
Question	pratikm	View Question on Stackoverflow
Solution 1 - Python	wim	View Answer on Stackoverflow
Solution 2 - Python	Nbarjest	View Answer on Stackoverflow
Solution 3 - Python	Nirmal	View Answer on Stackoverflow
Solution 4 - Python	Ben Pickering	View Answer on Stackoverflow

Invert image displayed by imshow in matplotlib

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

Solution 3 - Python

Solution 4 - Python

Powershell: How can I stop errors from being displayed in a script?

IF... OR IF... in a windows batch file

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