[Python] pip install : unable to find vcvarsall.bat

If you are on Windows and get this message :

Unable to find vcvarsall.bat

when you type pip install greenlet (or another lib)

Then you must :
- install MinGW (after the installation, run the MinGW Installation Manager and install only these two packages : mingw32-base et mingw32-gcc-g++)
- add the mingw's bin directory to your path
- edit or create C:\PythonXX\Lib\distutils\distutils.cfg and write :

[build] 

compiler=mingw32

- open an new cmd and type again your pip install greenlet (or another lib)

Have fun
:o)

[CSS] Animate your text with a simple CSS

Animate.css is a simple CSS file, but so powerful.


http://daneden.github.io/animate.css/

[Bottle + Tornado] From a Bottle application, sending parameters to the Tornado server

When you use Bottle + Tornado (or CherryPy,... etc...), you can give options to the Tornado server, by declaring them inside the Bottle run(...) method.

Here hello_bottle.py :

from bottle import route, run, template
import os

@route('/hello/<name>')
def index(name):
    return template('<b>Hello {{name}}</b>!', name=name)

data_dir='/'

#we give ssl_options to the Tornado server :
run(host='localhost', port=8080,server='tornado',ssl_options={
    "certfile": os.path.join(data_dir, "mydomain.crt"),
    "keyfile": os.path.join(data_dir, "mydomain.key"),
})

And when we execute :

python hello_bottle.py

Bottle v0.13-dev server starting up (using TornadoServer(ssl_options={'keyfile': '/mydomain.key', 'certfile': '/mydomain.crt'}))...

Listening on http://localhost:8080/

Hit Ctrl-C to quit.

Voila :o)

Source : 

SSL with Tornado :

http://stackoverflow.com/questions/13471115/how-to-handle-a-request-with-https-protocol-in-tornado

http://www.tornadoweb.org/en/stable/httpserver.html?highlight=ssl#tornado.httpserver.HTTPRequest.get_ssl_certificate

Sending parameters to CherryPy:

https://github.com/defnull/bottle/pull/544

Servers allowed with Bottle :

http://bottlepy.org/docs/dev/deployment.html

Comment se compliquer la vie en Java...

Mouaaaaa, je trouve ça marrant, les gens qui veulent montrer qu'ils connaissent les toutes dernières fonctionnalités de Java.

Voilà un exemple concret : suppression basique d'un répertoire temporaire (je dis bien : une simple "SUPPRESSION BASIQUE").

Ça c'est la version "je me la pète je maîtrise Java 7" :

Files.walkFileTree(tempDirectory, new SimpleFileVisitor<Path>() {
                @Override
                public FileVisitResult visitFile(Path file,
                        BasicFileAttributes attrs) throws IOException {

                    Files.delete(file);
                    return FileVisitResult.CONTINUE;
                }

                @Override
                public FileVisitResult postVisitDirectory(Path dir,
                        IOException exc) throws IOException {

                    if (exc == null) {
                        Files.delete(dir);
                        return FileVisitResult.CONTINUE;
                    } else {
                        throw exc;
                    }
                }
});

Euhhhh oui, c'est beau, il y a plein d'indentations et ça fait 15-20 lignes quand même...

Pourquoi ne pas implémenter une toute petite méthode récursive (le truc de base que l'on apprend en cours) ou tout simplement faire appel à Apache Commons (FileUtils.deleteDirectory(tempDirectory)) ?

Hormis le fait que je râle sur ce satané bout de code "tout moche" sur lequel je viens de tomber,
il y a derrière un vrai problème de fond : "faire la part des choses entre la maintenance/lisibilité et l'utilisation systématique/radicale/extrême des fonctionnalités évoluées de Java".

addSubview in UIAlertView deprecated in iOS7

There is a solution....

UIAlertView *alertView;

//a simple alert view with a simple message:

alertView = [[UIAlertView alloc]initWithTitle:nil message:@"My message here..." delegate:self cancelButtonTitle:nil otherButtonTitles:nil];

    

//a simple activity indicator:

UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];

activityIndicator.frame= CGRectMake(50, 10, 37, 37);

activityIndicator.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin;    

[activityIndicator startAnimating];

//the magic line below,   

//we associate the activity indicator to the alert view: (addSubview is not used)

[alertView setValue:activityIndicator forKey:@"accessoryView"];

    

[alertView show];

MongoDB + Raspberry Pi

Source : http://pear-programming.blogspot.fr/2013/05/mongodb-sur-raspberry-pi.html

[Knockout] How to define which properties are serialized in JSON ?

//we have a person structure, with a first name, a last name, 
//and a full name (computed field) :
function Person(first, last) {    
    this.first = ko.observable(first);    
    this.last = ko.observable(last);    
    this.full = ko.computed(function() {
        return this.first() + " " + this.last();
    }, this);
}

• Solution 1

//we define which properties are serialized in JSON 
//(in this case, only full) and how they are serialized 
//(in this case, a simple string) :
Person.prototype.toJSON = function() {
   //only full :
   return ko.utils.unwrapObservable(this.full); // we return a string of the value
};
var person=new Person("a","b");
console.log(ko.toJSON(person)); 
// => it will generate : "a b"

• Solution 2

//we define which properties are serialized in JSON 
//(in this case, first + last name):
Person.prototype.toJSON = function() {
    var copy = ko.toJS(this); //easy way to get a clean copy
    delete copy.full; //remove an extra property
    return copy; //return the copy to be serialized
};
var person=new Person("a","b");
console.log(ko.toJSON(person)); 
// => it will generate : {"first":"a", "last":"b"}

Source :http://www.knockmeout.net/2011/04/controlling-how-object-is-converted-to.html

[Python] convert timestamp -> datetime -> timestamp

#convert a date to a timestamp
def convert_to_timestamp(dt):
    return calendar.timegm(dt.utctimetuple())

#convert a timestamp to a datetime

def convert_to_date(timestamp_long):
    return datetime.datetime.utcfromtimestamp(timestamp_long)

Bottle Restful - Links

http://nongraphical.com/2012/08/using-bottle-py-in-production/

http://www.marginhound.com/bottle-py-resources/

http://myadventuresincoding.wordpress.com/2011/01/02/creating-a-rest-api-in-python-using-bottle-and-mongodb/

http://mark-kirby.co.uk/2013/creating-a-true-rest-api/

http://gotofritz.net/blog/weekly-challenge/restful-python-api-bottle/

Find files under Linux containing CRLF

find . -not -type d -exec file "{}" ";" | grep CRLF