Generate thumbnail in ubuntu
Filed under Qt
sudo apt-get install imagemagick
for i in $(ls *.png); do convert -scale 400 $i th-$i; done
Mar31
{MVC} Logic
MVC Frameworks, PHP Frameworks, CodeIgniter, QT4 – My Experience, Tips ,Tricks, Tweaks, Codes and much more… : MVC{model-view-controller} Logic – Code Hungry
Filed under Qt
sudo apt-get install imagemagick
for i in $(ls *.png); do convert -scale 400 $i th-$i; done
Mar31
Filed under Uncategorized
Code is like poetry
difficult to understand and often has other meaning than intended.
Code is like poetry.
Delightful to read
a pleasure to understand
a lifetime to master.
Dec28
Filed under Qt
def receive(request): assert request.method=="POST" print "receive.META.SERVER_PORT", request.META["SERVER_PORT"], request.POST files = [] for multipart_name in request.FILES.keys(): multipart_obj = request.FILES[multipart_name] content_type = multipart_obj['content-type'] filename = multipart_obj['filename'] content = multipart_obj['content'] files.append((filename, content_type, content)) import datetime # write file to the system - add timestamp in the name file("c:\\tmp\\%s_%s" % (datetime.datetime.now().isoformat().replace(":", "-"), filename), "wb").write(content) fnames = ",".join([fname for fname, ct, c in files]) return HttpResponse("me-%s-RECEIVE-OK[POST=%s,files=%s]" % (request.META["SERVER_PORT"], request.POST.values(), fnames )) |
def write_tmp_file(self,request): # open a new file to write the contents into new_file_name = TEMP_FILE_PATH + request.FILES['file'].name destination = open(new_file_name, 'wb+') destination.write(request.FILES['file'].read()) destination.close() return str(new_file_name) |
Jun27
Filed under Python
url = "http://example.com/" filename = "/home/yash/sample.dat" import urllib f=open(filename, 'rb') filebody = f.read() f.close() data = {'name':'file','file': filebody} u = urllib.urlopen(url,urllib.urlencode(data)) print u.read() import cStringIO import pycurl response = cStringIO.StringIO() c = pycurl.Curl() c.setopt(c.POST, 1) c.setopt(c.URL, url) c.setopt(c.HTTPPOST, [("file", (c.FORM_FILE, filename))]) # c.setopt(pycurl.HTTPPOST, [('file', (pycurl.FORM_FILE, file_path, pycurl.FORM_FILENAME, filename))]) c.setopt(c.VERBOSE, 1) c.setopt(c.WRITEFUNCTION, response.write) c.perform() c.close() print response.getvalue() import requests f = open (filename) r = requests.post(url = url, data = {'data':'data'}, files = {'file':f}) print r.status_code print r.headers print r.text |
Jun27
Filed under Python
import datetime now = datetime.datetime.now() print print "Current date and time using str method of datetime object:" print str(now) print print "Current date and time using instance attributes:" print "Current year: %d" % now.year print "Current month: %d" % now.month print "Current day: %d" % now.day print "Current hour: %d" % now.hour print "Current minute: %d" % now.minute print "Current second: %d" % now.second print "Current microsecond: %d" % now.microsecond print print "Current date and time using strftime:" print now.strftime("%Y-%m-%d %H:%M") |
Jun26
Filed under Python
ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy( paramiko.AutoAddPolicy() ) ssh.connect(hostname=hostname, username=username, password=password) sftp = paramiko.SFTPClient.from_transport(ssh.get_transport()) stdin, stdout, stderr = ssh.exec_command(cmd) channel = stdout.channel while True: if channel.exit_status_ready(): break #OTHER way #transport = paramiko.Transport((hostname, ports)) #transport.start_client() #transport.connect(username = username, password = password) #rfile = sftp.open(remoteD) #sftp.unlink(remoteD) if not sftp.stat(remoteD) : raise Exception("remote wav file not found") #to copy file from remote to local sftp.get(remotepath=remoteD, localpath=localD) |
References :
http://www.minvolai.com/blog/2009/09/how-to-ssh-in-python-using-paramiko/
Jun26
Filed under Python
Converting a wav into 16bit mono format
#Modifying sound file according to below requirement: # BitRate 128kbs # 16 bit # 8 KHz # Audio format PCM # Author : Yash import wav f = wave.open(filename) # read in entire wav file nFrames = f.getnframes() wdata = f.readframes(nFrames) params = f.getparams() f.close() n= list(params) #MONO n[0] = 1 #8000 hz n[2] = 8000 params = tuple(n) f = wave.open(filename,'wb') f.setparams(params) f.writeframes(wdata) f.close() |
Reference:
http://codingmess.blogspot.in/2008/07/how-to-make-simple-wav-file-with-python.html
http://stackoverflow.com/questions/9779416/faster-way-to-convert-from-24-bit-wav-pcm-format-to-float
Jun26
Filed under Python
In [34]: list1 = ['1','2','3','4'] In [35]: list1 Out[35]: ['1', '2', '3', '4'] In [36]: tup = tuple(list1) In [37]: tup Out[37]: ('1', '2', '3', '4') In [38]: backlist = list(tup) In [39]: backlist Out[39]: ['1', '2', '3', '4'] |
Jun26
sox samples
-c 2 : Number of channels
-b : 16 bit
-r 8000 sampling rate
-t u16(ulaw) / gsm shows type
pad 1000s : for adding gaps in the begining
Increase sound in wav
sox -v 2.0 file.wav
Adding Silence in the beggining of wav file
sox voice.wav pad 1000s
Converting MP3 to PCM based WAV
sox r.mp3 -r 8000 -c 1 tt1.wav
Converting MP3 to ulaw based WAV file
sox -v 2 -V /home/yash/dumps/r.mp3 -r 8000 -U -b 1 -c 1 -t u16 /home/yash/dumps/infile.ulaw resample -ql
lame -b 128 -m m –resample 8
Reference links:
http://sox.sourceforge.net/sox.html
http://www.thegeekstuff.com/2009/05/sound-exchange-sox-15-examples-to-manipulate-audio-files/
http://sox.sourceforge.net/soxformat.html
http://sox.sourceforge.net/Docs/FAQ
For missing types in SOX
sudo apt-get install libsox-fmt-all
Jun26
The easiest way to set an environment variable in CentOS is to use export as in
<pre>$> export JAVA_HOME=/usr/java/jdk.1.5.0_12
$> export PATH=$PATH:$JAVA_HOME</pre>
However, variables set in such a manner are transient i.e. they will disappear the moment you exit the shell. Obviously this is not helpful when setting environment variables that need to persist even when the system reboots.
In such cases, you need to set the variables within the system wide profile. In CentOS (I’m using v5.2), the folder /etc/profile.d/ is the recommended place to add customizations to the system profile.
For example, when installing the Sun JDK, you might need to set the JAVA_HOME and JRE_HOME environment variables. In this case:
Create a new file called java.sh
vim /etc/profile.d/java.sh
Within this file, initialize the necessary environment variables
export JRE_HOME=/usr/java/jdk1.5.0_12/jre
export PATH=$PATH:$JRE_HOME/bin
export JAVA_HOME=/usr/java/jdk1.5.0_12
export JAVA_PATH=$JAVA_HOME
export PATH=$PATH:$JAVA_HOME/bin
Now when you restart your machine, the environment variables within java.sh will be automatically initialized (checkout /etc/profile if you are curious how the files in /etc/profile.d/ are loaded) .
PS: If you want to load the environment variables within java.sh without having to restart the machine, you can use the source command as in:
$> source java.sh
Jun26