You need to put the format arguments into a tuple (add parentheses):

    instr = &quot;&#39;%s&#39;, &#39;%s&#39;, &#39;%d&#39;, &#39;%s&#39;, &#39;%s&#39;, &#39;%s&#39;, &#39;%s&#39;&quot; % (softname, procversion, int(percent), exe, description, company, procurl)

What you currently have is equivalent to the following:

    intstr = (&quot;&#39;%s&#39;, &#39;%s&#39;, &#39;%d&#39;, &#39;%s&#39;, &#39;%s&#39;, &#39;%s&#39;, &#39;%s&#39;&quot; % softname), procversion, int(percent), exe, description, company, procurl

Example:

    &gt;&gt;&gt; &quot;%s %s&quot; % &#39;hello&#39;, &#39;world&#39;
    Traceback (most recent call last):
      File &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;
    TypeError: not enough arguments for format string
    &gt;&gt;&gt; &quot;%s %s&quot; % (&#39;hello&#39;, &#39;world&#39;)
    &#39;hello world&#39;



Note that the `%` syntax for formatting strings is becoming outdated. If your version of Python supports it, you should write:

    instr = &quot;&#39;{0}&#39;, &#39;{1}&#39;, &#39;{2}&#39;, &#39;{3}&#39;, &#39;{4}&#39;, &#39;{5}&#39;, &#39;{6}&#39;&quot;.format(softname, procversion, int(percent), exe, description, company, procurl)

This also fixes the error that you happened to have.

I got the same error when using `%` as a percent character in my format string.  The solution to this is to double up the `%%`.

I had the same issue I was using a *raw* query for a specific reason and this was to add double quotes in TIME_FORMAT function.

    User.objects.raw(
                f&#39;SELECT f1,f2,TIME_FORMAT(SEC_TO_TIME(SUM(TIME_TO_SEC(end_time) - TIME_TO_SEC(start_time))),&quot;%%H:%%i&quot;) AS log FROM users GROUP BY start_dt&#39;)

Everywhere I look, I see that MongoDB is CP.
But when I dig in I see it is eventually consistent.
Is it CP when you use safe=true? If so, does that mean that when I write with safe=true, all replicas will be updated before getting the result?

Where does mongodb stand in the CAP theorem?

Please help me understand the use-case behind `SELECT ... FOR UPDATE`.

**Question 1**: Is the following a good example of when `SELECT ... FOR UPDATE` should be used?

Given:

* rooms[id]
* tags[id, name]
* room_tags[room_id, tag_id]
  * room_id and tag_id are foreign keys

The application wants to list all rooms and their tags, but needs to differentiate between rooms with no tags versus rooms that have been removed. If SELECT ... FOR UPDATE is not used, what could happen is:

* Initially:
  * rooms contains `[id = 1]`
  * tags contains `[id = 1, name = &#39;cats&#39;]`
  * room_tags contains `[room_id = 1, tag_id = 1]`
* Thread 1: `SELECT id FROM rooms;`
  * `returns [id = 1]`
* Thread 2: `DELETE FROM room_tags WHERE room_id = 1;`
* Thread 2: `DELETE FROM rooms WHERE id = 1;`
* Thread 2: [commits the transaction]
* Thread 1: `SELECT tags.name FROM room_tags, tags WHERE room_tags.room_id = 1 AND tags.id = room_tags.tag_id;`
  * returns an empty list

Now Thread 1 thinks that room 1 has no tags, but in reality the room has been removed. To solve this problem, Thread 1 should `SELECT id FROM rooms FOR UPDATE`, thereby preventing Thread 2 from deleting from `rooms` until Thread 1 is done. Is that correct?

**Question 2**: When should one use `SERIALIZABLE` transaction isolation versus `READ_COMMITTED` with `SELECT ... FOR UPDATE`?

Answers are expected to be portable (not database-specific). If that&#39;s not possible, please explain why.

When to use SELECT ... FOR UPDATE?

Here&#39;s the output.  These are utf-8 strings I believe... some of these can be NoneType but it fails immediately, before ones like that...

    instr = &quot;&#39;%s&#39;, &#39;%s&#39;, &#39;%d&#39;, &#39;%s&#39;, &#39;%s&#39;, &#39;%s&#39;, &#39;%s&#39;&quot; % softname, procversion, int(percent), exe, description, company, procurl

TypeError: not enough arguments for format string


Its 7 for 7 though?

Python TypeError: not enough arguments for format string

Here's the output. These are utf-8 strings I believe... some of these can be NoneType but it fails immediately, before ones like that...
<pre><code class="hljs language-perl">instr = "'%s', '%s', '%d', '%s', '%s', '%s', '%s'" % softname, procversion, int(percent), exe, description, company, procurl
</code></pre>
TypeError: not enough arguments for format string
Its 7 for 7 though?

How do I persuade Jinja2 to not print `&quot;None&quot;` when the value is `None`?

I have a number of entries in a dictionary and I would like to output everything in a single loop instead of having special cases for different keywords.  If I have a value of `None` (the `NoneType` not the string) then the string `&quot;None&quot;` is inserted into the template rendering results.

Trying to suppress it using 
`{{ value or &#39;&#39; }}` works too well as it will replace the numeric value zero as well.

Do I need to filter the dictionary before passing it to Jinja2 for rendering?



Suppress &quot;None&quot; output as string in Jinja2

Without going through with the installation, I want to quickly see all the packages that ```pip install``` would install.

Is there a way to list pip dependencies/requirements?

Just starting to play around with Flask on a local server and I&#39;m noticing the request/response times are way slower than I feel they should be.

Just a simple server like the following takes close to 5 seconds to respond.

    from flask import Flask

    app = Flask(__name__)

    @app.route(&quot;/&quot;)
    def index():
        return &quot;index&quot;

    if __name__ == &quot;__main__&quot;:
        app.run()

Any ideas? Or is this just how the local server is?

Slow Requests on Local Flask Server

Given:

    import argparse
    
    pa = argparse.ArgumentParser()
    pa.add_argument(&#39;--foo&#39;)
    pa.add_argument(&#39;--bar&#39;)
    
    print pa.parse_args(&#39;--foo 1&#39;.split())

how do I

- make at least one of &quot;foo, bar&quot; mandatory: `--foo x`, `--bar y` and `--foo x --bar y` are fine
- make at most one of &quot;foo, bar&quot; mandatory: `--foo x` or `--bar y` are fine, `--foo x --bar y` is not

Require either of two arguments using argparse

I am studying Python and currently going through some more learning with dictionaries.

I was wondering;

If I have a dictionary like: `d = {&#39;key_1&#39;: &#39;value_a&#39;, &#39;key_2&#39;: &#39;value_b&#39;}` and I want separate/divide this dictionary into variables where each variable is a key from the dictionary and each variables value is the value of that key in the dictionary.

What would be the best pythonic way to achieve this?

    d = {&#39;key_1&#39;: &#39;value_a&#39;, &#39;key_2&#39;: &#39;value_b&#39;}
    #perform the command and get
    key_1 = &#39;value_a&#39;
    key_2 = &#39;value_b&#39;

I tried: `key_1, key_2 = d` but it did not work.

Basically I am seeking expert&#39;s wisdom to find out if there is a better way to reduce 2 lines of code into one.

Note: This is not a dynamic variable creation.

Divide a dictionary into variables

It&#39;s common knowledge that Java `String`s are immutable. Immutable Strings are great addition to java since its inception. Immutability allows fast access and a lot of optimizations, significantly less error-prone compared to C-style strings, and helps enforce the security model.

It&#39;s possible to create a mutable one without using hacks, namely

* `java.lang.reflect`
* `sun.misc.Unsafe`
* Classes in bootstrap classloader
* JNI (or JNA as it requires JNI)

But is it possible in just plain Java, so that the string can be modified at any time? The question is *How*?

&lt;!-- Edits must be at least 6 characters --&gt;

Create a mutable java.lang.String

Say I have the string

    s = &quot;&quot;&quot;
        Controller = require &#39;controller&#39;
    
        class foo
            view: &#39;baz&#39;
            class: &#39;bar&#39;
    
            constructor: -&gt;
                Controller.mix @
    &quot;&quot;&quot;

Every line in the string now has a global 4 space indentation. If this string was declared inside a function, it would have a 8 space global indentation, etc.

Does Python have a function for removing the global left indentation of string?

I would like that function output to be:

    Controller = require &#39;controller&#39;
    
    class foo
        view: &#39;baz&#39;
        class: &#39;bar&#39;
    
        constructor: -&gt;
            Controller.mix @&quot;

Does Python have a built-in function for unindenting a multiline string?

I&#39;m learning Ruby and I&#39;ve seen a couple of methods that are confusing me a bit, particularly `to_s` vs `to_str` (and similarly, `to_i`/`to_int`, `to_a`/`to_ary`, &amp; `to_h`/`to_hash`). What I&#39;ve read explains that the shorter form (e.g. `to_s`) are for explicit conversions while the longer form are for implicit conversions.

I don&#39;t really understand how `to_str` would actually be used. Would something other than a String ever define `to_str`? Can you give a practical application for this method?

to_s vs. to_str (and to_i/to_a/to_h vs. to_int/to_ary/to_hash) in Ruby

I get the exception from the title when I run my app. What it does is it has a .txt file with words for a Hangman game and I think the exception is thrown when accessing the file. My file, cuvinte.txt is located into /assets/. Here is my code (i skipped the layout/xml part, which works fine):

    public void onCreate() {
        // all the onCreate() stuff, then this:
        try {
            AssetManager am = this.getAssets();
    	    InputStream is = am.open(&quot;cuvinte.txt&quot;);
    	    InputStreamReader inputStreamReader = new InputStreamReader(is);
            BufferedReader b = new BufferedReader(inputStreamReader);
    	    String rand;
    	    while((rand=b.readLine())!=null){
                cuvinte.add(rand);
      	    }
        } catch (IOException e) {
            Toast.makeText(this, &quot;No words file&quot;, Toast.LENGTH_LONG).show();
            e.printStackTrace();
        }
          
        newGame(newG);
    }
        
    public void newGame(View view){
      	Random rand = new Random();
       	String stringCuvant = cuvinte.get(rand.nextInt(cuvinte.size()));
       	cuvant.setText(&quot;&quot;);
       	System.out.println(stringCuvant);
       	for(int i = 0; i&lt; stringCuvant.length(); i++){
       		cuvant.append(&quot;_ &quot;);
       	}
       	incercari.setText(valIncercari);
    }

The function newGame() is called both when the new game button is pressed and at the beginning of the activity, in the onCreate() function.

Android: android.content.res.Resources$NotFoundException: String resource ID #0x5

I am converting a string like &quot;41.00027357629127&quot;, and I am using;

    Convert.ToSingle(&quot;41.00027357629127&quot;);

or

    float.Parse(&quot;41.00027357629127&quot;);

These methods return *4.10002732E+15*.

When I convert to float I want &quot;41.00027357629127&quot;. This string should be the same...


Converting String To Float in C#

In Python there seem to be two different ways of generating formatted output:

    user = &quot;Alex&quot;
    number = 38746
    print(&quot;%s asked %d questions on stackoverflow.com&quot; % (user, number))
    print(&quot;{0} asked {1} questions on stackoverflow.com&quot;.format(user, number))

Is there one way to be preferred over the other? Are they equivalent, what is the difference? What form should be used, especially for Python3?

Python way of printing: with &#39;format&#39; or percent form?

Instead of doing this, I want to make use of `string.format()` to accomplish the same result:

    if (myString.Length &lt; 3)
    {
        myString =  &quot;00&quot; + 3;
    }




Format string to a 3 digit number

When JAXB marshals a date object (`XMLGregorianCalendar`) into an xsd:dateTime element. How can you specify the format of the resulting XML?

For example:
The default data format uses milliseconds `&lt;StartDate&gt;2012-08-21T13:21:58.000Z&lt;/StartDate&gt;`
I need to omit the milliseconds.  `&lt;StartDate&gt;2012-08-21T13:21:58Z&lt;/StartDate&gt;`

How can I specify the output form/date format that I want it to use?
I&#39;m using `javax.xml.datatype.DatatypeFactory` to create the `XMLGregorianCalendar` object.

    XMLGregorianCalendar xmlCal = datatypeFactory.newXMLGregorianCalendar(cal);
    



How do you specify the date format used when JAXB marshals xsd:dateTime?

I want to get current time in a specific format with javascript.


With the function below and calling it will give me 
**Fri Feb 01 2013 13:56:40 GMT+1300 (New Zealand Daylight Time)**
but I want to format it like
**Friday 2:00pm
1 Feb 2013**


    var d = new Date();
    var x = document.getElementById(&quot;time&quot;);
    x.innerHTML = d;


Of course, code above doesn&#39;t have any formatting logic but I have not come across with any &quot;working&quot; formatters yet.

Current time formatting with Javascript

I have a small question.  I know that the %x format specifier can be used to read values from the stack in a format string attack.

I found the following code:

    %08x%08x%08x%08x

What does the 08 mean?  What is it doing exactly?  Thanks :)

C - The %x format specifier

Following is my code:

    test = &#39;abc&#39;
    if True:
        raise test + &#39;def&#39;

And when i run this, it gives me the `TypeError`
    
    TypeError: exceptions must be old-style classes or derived from BaseException, not str

So what kind of type should the `test` be?

TypeError:exceptions must be old-style classes or derived from BaseException, not str

I am trying to send a simple dictionary to a json file from python, but I keep getting the &quot;TypeError: 1425 is not JSON serializable&quot; message.

    import json
    alerts = {&#39;upper&#39;:[1425],&#39;lower&#39;:[576],&#39;level&#39;:[2],&#39;datetime&#39;:[&#39;2012-08-08 15:30&#39;]}
    afile = open(&#39;test.json&#39;,&#39;w&#39;)
    afile.write(json.dumps(alerts,encoding=&#39;UTF-8&#39;))
    afile.close()

If I add the default argument, then it writes, but the integer values are written to the json file as strings, which is undesirable.

    afile.write(json.dumps(alerts,encoding=&#39;UTF-8&#39;,default=str))


&quot;TypeError: (Integer) is not JSON serializable&quot; when serializing JSON in Python?

Perhaps I&#39;ve fallen victim to misinformation on the web, but I think it&#39;s more likely just that I&#39;ve misunderstood something.  Based on what I&#39;ve learned so far, range() is a generator, and generators can be used as iterators.  However, this code:

    myrange = range(10)
    print(next(myrange))
gives me this error:

    TypeError: &#39;range&#39; object is not an iterator
What am I missing here?  I was expecting this to print 0, and to advance to the next value in `myrange`.  I&#39;m new to Python, so please accept my apologies for the rather basic question, but I couldn&#39;t find a good explanation anywhere else.

If range() is a generator in Python 3.3, why can I not call next() on a range?

I&#39;m trying to take a file that looks like this:
```none
AAA x 111
AAB x 111
AAA x 112
AAC x 123
...
```
And use a dictionary to so that the output looks like this

    {AAA: [&#39;111&#39;, &#39;112&#39;], AAB: [&#39;111&#39;], AAC: [123], ...}

This is what I&#39;ve tried

    file = open(&quot;filename.txt&quot;, &quot;r&quot;) 
    readline = file.readline().rstrip()
    while readline!= &quot;&quot;:
        list = []
        list = readline.split(&quot; &quot;)
        j = list.index(&quot;x&quot;)
        k = list[0:j]
        v = list[j + 1:]
        d = {}
        if k not in d == False:
            d[k] = []
        d[k].append(v)
        readline = file.readline().rstrip()

I keep getting a `TypeError: unhashable type: &#39;list&#39;`. I know that keys in a dictionary can&#39;t be lists but I&#39;m trying to make my value into a list not the key. I&#39;m wondering if I made a mistake somewhere.


How to overcome TypeError: unhashable type: &#39;list&#39;

I have defined a class in a file named `Object.py`. When I try to inherit from this class in another file, calling the constructor throws an exception:

    TypeError: module.__init__() takes at most 2 arguments (3 given)

This is my code:

    import Object

    class Visitor(Object):
        pass

    instance = Visitor()  # this line throws the exception

What am I doing wrong?


Content Type	Original Author	Original Content on Stackoverflow
Question	y2k	View Question on Stackoverflow
Solution 1 - Python	Andrew Clark	View Answer on Stackoverflow
Solution 2 - Python	Simeon Visser	View Answer on Stackoverflow
Solution 3 - Python	Bruce Jakeway	View Answer on Stackoverflow
Solution 4 - Python	Hardik Raval	View Answer on Stackoverflow

Python TypeError: not enough arguments for format string

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

Solution 3 - Python

Solution 4 - Python

When to use SELECT ... FOR UPDATE?

Where does mongodb stand in the CAP theorem?

Attributions