This can be detected using [`isatty`](https://docs.python.org/3/library/io.html#io.IOBase.isatty):

    if sys.stdout.isatty():
        # You&#39;re running in a real terminal
    else:
        # You&#39;re being piped or redirected

To demonstrate this in a shell:
* `python -c &quot;import sys; print(sys.stdout.isatty())&quot;` should write True
* `python -c &quot;import sys; print(sys.stdout.isatty())&quot; | cat` should write False

I&#39;ve isolated a little test case of IE7&#39;s `z-index` bug, but don&#39;t know how to fix it. 
I have been playing with `z-index` all day long.

What is wrong with `z-index` in IE7?

Test CSS:

&lt;!-- language: lang-css --&gt;

    input {
    	border: 1px solid #000;
    }

    div {
    	border: 1px solid #00f;
    }

    ul {
    	border: 1px solid #f00;
    	background-color: #f00;
    	list-style-type: none;
    	margin: 0;
    	padding-left: 0;
    	z-index: 1000;
    }

    li {
    	color: #fff;
    	list-style-type: none;
    	padding-left: 0;
    	margin-left: 0;
    }

    span.envelope {
    	position: relative;
    }

    span.envelope ul {
    	position: absolute;
    	top: 20px;
    	left: 0;
    	width: 150px;
    }

Test HTML:

&lt;!-- language: lang-html --&gt;

    &lt;form&gt;
      &lt;label&gt;Input #1:&lt;/label&gt;
      &lt;span id=&quot;envelope-1&quot; class=&quot;envelope&quot;&gt;
        &lt;input name=&quot;my-input-1&quot; id=&quot;my-input-1&quot; /&gt;
          &lt;ul&gt;
            &lt;li&gt;item&lt;/li&gt;
            &lt;li&gt;item&lt;/li&gt;
            &lt;li&gt;item&lt;/li&gt;
            &lt;li&gt;item&lt;/li&gt;
          &lt;/ul&gt;
      &lt;/span&gt;
      &lt;br&gt;&lt;br&gt;
      &lt;label&gt;Input #2:&lt;/label&gt;
      &lt;span id=&quot;envelope-2&quot; class=&quot;envelope&quot;&gt;
        &lt;input name=&quot;my-input-2&quot; id=&quot;my-input-2&quot; /&gt;
      &lt;/span&gt;
    &lt;/form&gt;

IE7 Z-Index Layering Issues

Coming from a Python background, where there is always a &quot;right way to do it&quot; (a &quot;Pythonic&quot; way) when it comes to style, I&#39;m wondering if the same exists for Ruby. I&#39;ve been using my own style guidelines but I&#39;m thinking about releasing my source code, and I&#39;d like it to adhere to any unwritten rules that might exist.

Is it &quot;The Ruby Way&quot; to explicitly type out `return` in methods? I&#39;ve seen it done with and without, but is there a right way to do it? Is there maybe a right *time* to do it? For example:

    def some_func(arg1, arg2, etc)
      # Do some stuff...
      return value # &lt;-- Is the &#39;return&#39; needed here?
    end


Is it good style to explicitly return in Ruby?

Is there a way to detect whether `sys.stdout` is attached to a console terminal or not? For example, I want to be able to detect if foo.py is run via:

    $ python foo.py  # user types this on console

OR

    $ python foo.py &gt; output.txt # redirection
    $ python foo.py | grep ....  # pipe

The reason I ask this question is that I want to make sure that my progressbar display happens only in the former case (real console).


How do I detect whether sys.stdout is attached to terminal or not?

Is there a way to detect whether <code>sys.stdout</code> is attached to a console terminal or not? For example, I want to be able to detect if foo.py is run via:
<pre><code class="hljs language-ruby">$ python foo.py # user types this on console
</code></pre>
OR
<pre><code class="hljs language-shell">$ python foo.py > output.txt # redirection
$ python foo.py | grep .... # pipe
</code></pre>
The reason I ask this question is that I want to make sure that my progressbar display happens only in the former case (real console).

I&#39;m wondering if there&#39;s a reason that there&#39;s no `first(iterable)` in the Python built-in functions, somewhat similar to `any(iterable)` and `all(iterable)` (it may be tucked in a stdlib module somewhere, but I don&#39;t see it in `itertools`). `first` would perform a short-circuit generator evaluation so that unnecessary (and a potentially infinite number of) operations can be avoided; i.e.

    def identity(item):
        return item
    
    def first(iterable, predicate=identity):
        for item in iterable:
            if predicate(item):
                return item
        raise ValueError(&#39;No satisfactory value found&#39;)

This way you can express things like:

    denominators = (2, 3, 4, 5)
    lcd = first(i for i in itertools.count(1)
        if all(i % denominators == 0 for denominator in denominators))

Clearly you can&#39;t do `list(generator)[0]` in that case, since the generator doesn&#39;t terminate.

Or if you have a bunch of regexes to match against (useful when they all have the same `groupdict` interface):

    match = first(regex.match(big_text) for regex in regexes)

You save a lot of unnecessary processing by avoiding `list(generator)[0]` and short-circuiting on a positive match.

Why is there no first(iterable) built-in function in Python?

I tried running a python script:

    print &quot;Hello, World!&quot; 

And I get this error:

      File &quot;hello.py&quot;, line 1
        print &quot;Hello, World!&quot;
                            ^
    SyntaxError: invalid syntax

What is going on?

Hello World in Python

I am creating a Python script within which I am executing UNIX system commands. I have a
war archive named Binaries.war which is within an ear archive named Portal.ear

The Portal ear file resides in, say /home/foo/bar/

    jar xf /home/foo/bar/Portal.ear Binaries.war

Will extract the Binaries.war file out of the /home/foo/bar/Portal.ear archive into the current directory I am running the script from.

How do you specify a target directory to be extracted to using just one command? 
I would like to do something like this to extract Binaries.war into the directory /home/foo/bar/baz 

    jar xf /home/foo/bar/Portal.ear Binaries.war [into target directory /home/foo/bar/baz]

I searched the the JAR man page for options and can&#39;t seem to find a simple way to do this. Of course I can extract the archive into my current directory and then move it using mv but I&#39;d like to do this in one shot and not shuffle directories and files around.

How do you extract a JAR in a UNIX filesystem with a single command and specify its target directory using the JAR command?

Python is the language I know the most, and strangely I still don&#39;t know why I&#39;m typing &quot;self&quot; and not &quot;this&quot; like in Java or PHP.

I know that Python is older than Java, but I can&#39;t figure out where does this come from. Especially since you can use any name instead of &quot;self&quot;: the program will work fine.

So where does this convention come from?

Why do pythonistas call the current reference &quot;self&quot; and not &quot;this&quot;?

How can I retrieve the links of a webpage and copy the url address of the links using Python?

retrieve links from web page using python and BeautifulSoup

I need to write JUnit tests for an old application that&#39;s poorly designed and is writing a lot of error messages to standard output. When the `getResponse(String request)` method behaves correctly it returns a XML response:

    @BeforeClass
    public static void setUpClass() throws Exception {
        Properties queries = loadPropertiesFile(&quot;requests.properties&quot;);
        Properties responses = loadPropertiesFile(&quot;responses.properties&quot;);
        instance = new ResponseGenerator(queries, responses);
    }

    @Test
    public void testGetResponse() {
        String request = &quot;&lt;some&gt;request&lt;/some&gt;&quot;;
        String expResult = &quot;&lt;some&gt;response&lt;/some&gt;&quot;;
        String result = instance.getResponse(request);
        assertEquals(expResult, result);
    }


But when it gets malformed XML or does not understand the request it returns `null` and writes some  stuff to standard output.

Is there any way to assert console output in JUnit? To catch cases like:

    System.out.println(&quot;match found: &quot; + strExpr);
    System.out.println(&quot;xml not well formed: &quot; + e.getMessage());




JUnit test for System.out.println()

I&#39;m using Ubuntu 9.04 x64 and when I write:

    gnome-terminal --tab

At the terminal, I expect it to open a new tab in the same terminal window. But it opens a new window instead.

I found out that its intention is to open a new tab in a new window, i.e., if I write:

    gnome-terminal --tab --tab

It will open a new window with two tabs.

So, the question is, how can I open a new tab in the _current_ window using a command in `gnome-terminal`?




How to open a new tab in GNOME Terminal from command line?

Is there any way to turn off all `console.log` statements in my JavaScript code, for testing purposes?

How to quickly and conveniently disable all console.log statements in my code?

Can someone tell me how to get the handle of a Windows console application in C#? In a Windows Forms application, I would normally try `this.Handle`.

How do I get the handle of a console application&#39;s window

I&#39;ve got a win32 project that I&#39;ve loaded into Visual Studio 2005. I&#39;d like to be able to print things to the Visual Studio output window, but I can&#39;t for the life of me work out how. I&#39;ve tried &#39;printf&#39; and &#39;cout &lt;&lt;&#39; but my messages stay stubbornly unprinted.

Is there some sort of special way to print to the Visual Studio output window?

How do I print to the debug output window in a Win32 app?

I have always found startup profile files of other people both useful and instructive about the language. Moreover, while I have some customization for [Bash][1] and [Vim][2], I have nothing for R.

For example, one thing I always wanted is different colors for input and output text in a window terminal, and maybe even syntax highlighting.

  [1]: https://en.wikipedia.org/wiki/Bash_%28Unix_shell%29
  [2]: https://en.wikipedia.org/wiki/Vim_%28text_editor%29




Expert R users, what&#39;s in your .Rprofile?

I would like to copy all files out of a dir except for one named Default.png. It seems that there are a number of ways to do this. What seems the most effective to you?

BASH copy all files except one

I&#39;m trying to do the opposite of &quot;https://stackoverflow.com/questions/1312922/detect-if-stdin-is-a-terminal-or-pipe-in-c-c-qt&quot;.

I&#39;m running an application that&#39;s changing its output format because it detects a pipe on STDOUT, and I want it to think that it&#39;s an interactive terminal so that I get the same output when redirecting.

I was thinking that wrapping it in an `expect` script or using a `proc_open()` in PHP would do it, but it doesn&#39;t.

Any ideas out there?


How to trick an application into thinking its stdout is a terminal, not a pipe

I would like a Java program to have different default settings (verbosity, possibly colored output where supported) depending on its use. In C, there is an isatty() function which will return 1 if a file descriptor is connected to a terminal, and 0 otherwise. Is there an equivalent for this in Java? I haven&#39;t seen anything in the JavaDoc for InputStream or PrintStream.

Content Type	Original Author	Original Content on Stackoverflow
Question	Sridhar Ratnakumar	View Question on Stackoverflow
Solution 1 - Python	RichieHindle	View Answer on Stackoverflow

How do I detect whether sys.stdout is attached to terminal or not?

Python Problem Overview

Python Solutions

Solution 1 - Python

Is it good style to explicitly return in Ruby?

IE7 Z-Index Layering Issues

Attributions