Nugroho's blog.: os x
Showing posts with label os x. Show all posts
Showing posts with label os x. Show all posts

Sunday, December 18, 2011

Django ain't for This

While I'm searching for tutorial about creating simple static web page using Django, I surprised that i found almost nothing. There is Django documentation for it but I think it's too much; creating microblogger, forum, note, wiki, etc.

According what I found after surfed a while, Django isn't for this. I was suggestet to use basehttpserver instead.

Here what I found

"I have python scripts which provides output and I need to have this output on the web."

That is not what Django is for. What you want to do can be achieved with something as simple as this:

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

class Handler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_header("Content-type", "text/html")

self.wfile.write("magic content goes here")

if __name__=="__main__":
server = HTTPServer(("", 8080), Handler)
except KeyboardInterrupt:
Observe the self.wfile.write line. Whatever you write there ends up in the browser. If it matters, you can use self.path in the Handler to check which file was requested.

Tested with Python 2.6.4, accessed the server with Chrome browser.


If you need a quick web server running and you don't want to mess with setting up apache or something similar, then Python can help. Python comes with a simple builtin HTTP server. With the help of this little HTTP server you can turn any directory in your system into your web server directory. The only thing you need to have installed is Python.

Practically speaking this is very useful to share files inside your local network. Implementing this tiny but hugely useful HTTP server is very simple, its just a single line command.

Assume that I would like to share my home directory
Open up a terminal and type:

$ cd 
$ python -m SimpleHTTPServer

That's it! Now your http server will start in port 8000. You will get the message:
Serving HTTP on port 8000 ...

Now open a browser and type the computer address like:

If you on computer that is running server, you can also access it via:

If the directory has a file named index.html, that file will be served as the initial file. If there is no index.html, then the files in the directory will be listed.
If you wish to change the port that's used start the program via:

$ python -m SimpleHTTPServer 8080

If you want to only serve on localhost you'll need to write a custom Python program such as:

import sys
import BaseHTTPServer
from SimpleHTTPServer import SimpleHTTPRequestHandler

HandlerClass = SimpleHTTPRequestHandler
ServerClass = BaseHTTPServer.HTTPServer
Protocol = "HTTP/1.0"

if sys.argv[1:]:
port = int(sys.argv[1])
port = 8000
server_address = ('', port)

HandlerClass.protocol_version = Protocol
httpd = ServerClass(server_address, HandlerClass)

sa = httpd.socket.getsockname()
print "Serving HTTP on", sa[0], "port", sa[1], "..."

Saturday, December 17, 2011


I confused about GCC version brought by XCode 4.2 on OS X Lion, so I surfing and landing on several sites to find out what is this llvm version.

Here some result.

Llvm stand for low level virtual machine

The LLVM Project ( is a collection of modular and reusable compiler and toolchain technologies. Despite its name, LLVM has little to do with traditional virtual machines, though it does provide helpful libraries that can be used to build them.

The llvm-gcc command is the LLVM C front end. It is a modified version of gcc that compiles C/ObjC programs into native objects, LLVM bitcode or LLVM assembly language, depending upon the options.

By default, llvm-gcc compiles to native objects just like GCC does. If the -emit-llvm and -c options are given then it will generate LLVM bitcode files instead. If -emit-llvm and -S are given, then it will generate LLVM assembly.

Being derived from the GNU Compiler Collection, llvm-gcc has many of gcc's features and accepts most of gcc's options. It handles a number of gcc's extensions to the C programming language. See the gcc documentation for details.

Clang vs GCC (GNU Compiler Collection)

Clang ( /ˈklæŋ/)[2] is a compiler front end for the C, C++, Objective-C, and Objective-C++ programming languages. It uses the Low Level Virtual Machine (LLVM) as its back end, and Clang has been part of LLVM releases since LLVM 2.6.

Its goal is to offer a replacement to the GNU Compiler Collection (GCC). Development is sponsored by Apple. Clang is available under a free software license.

The Clang project includes the Clang front end and the Clang static analyzer among others.[3]

Pro's of GCC vs clang:

  • GCC supports languages that clang does not aim to, such as Java, Ada, FORTRAN, etc.
  • GCC has a few C++'11 features that Clang does not yet support.
  • GCC supports more targets than LLVM.
  • GCC is popular and widely adopted.
  • GCC does not require a C++ compiler to build it.

Pro's of clang vs GCC:

  • The Clang ASTs and design are intended to be easily understandable by anyone who is familiar with the languages involved and who has a basic understanding of how a compiler works. GCC has a very old codebase which presents a steep learning curve to new developers.
  • Clang is designed as an API from its inception, allowing it to be reused by source analysis tools, refactoring, IDEs (etc) as well as for code generation. GCC is built as a monolithic static compiler, which makes it extremely difficult to use as an API and integrate into other tools. Further, its historic design and current policy makes it difficult to decouple the front-end from the rest of the compiler.
  • Various GCC design decisions make it very difficult to reuse: its build system is difficult to modify, you can't link multiple targets into one binary, you can't link multiple front-ends into one binary, it uses a custom garbage collector, uses global variables extensively, is not reentrant or multi-threadable, etc. Clang has none of these problems.
  • For every token, clang tracks information about where it was written and where it was ultimately expanded into if it was involved in a macro. GCC does not track information about macro instantiations when parsing source code. This makes it very difficult for source rewriting tools (e.g. for refactoring) to work in the presence of (even simple) macros.
  • Clang does not implicitly simplify code as it parses it like GCC does. Doing so causes many problems for source analysis tools: as one simple example, if you write "x-x" in your source code, the GCC AST will contain "0", with no mention of 'x'. This is extremely bad for a refactoring tool that wants to rename 'x'.
  • Clang can serialize its AST out to disk and read it back into another program, which is useful for whole program analysis. GCC does not have this. GCC's PCH mechanism (which is just a dump of the compiler memory image) is related, but is architecturally only able to read the dump back into the exact same executable as the one that produced it (it is not a structured format).
  • Clang is much faster and uses far less memory than GCC.
  • Clang aims to provide extremely clear and concise diagnostics (error and warning messages), and includes support for expressive diagnostics. GCC's warnings are sometimes acceptable, but are often confusing and it does not support expressive diagnostics. Clang also preserves typedefs in diagnostics consistently, showing macro expansions and many other features.
  • GCC is licensed under the GPL license. clang uses a BSD license, which allows it to be used by projects that do not themselves want to be GPL.
  • Clang inherits a number of features from its use of LLVM as a backend, including support for a bytecode representation for intermediate code, pluggable optimizers, link-time optimization support, Just-In-Time compilation, ability to link in multiple code generators, etc.
  • Clang's support for C++ is more compliant than GCC's in many ways (e.g. conformant two phase name lookup).

From forum (
"Have you experienced any incompatibility between LLVM compiler and GCC compiler ?

I found one strange issue:
If you compile ParticleTests with GCC and if you try sub-test "issue 872", it works as expected: a particle system will emit particles.
But if you compile it with LLVM 1.5, you won't see any particle at all. I'm not sure what's the problem, but I'll investigate it a bit further.

I can only reproduce this bug on the simulator. It seems that this bug can't be reproduced on the devices.

I tested it both in Release & Debug mode using Xcode 3.2.3"

"A developer at Apple (guy working on LLVM) highly suggested moving away from GCC immediately. He says Apple is no longer fixing bugs in GCC, and in XCode 4 GCC-LLVM will be the default option.

I've noticed sometimes LLVM will not compile against really old libraries compiled with GCC (gives errors about built in runtime functions not found). I can fix that by using GCC-LLVM (gcc parser, LLVM code generator).

A few days ago I noticed a bug in my code that only showed up when using LLVM (but not GCC). I tracked it down to a non initialized local variable that was being read from, and GCC would always initialize to zero (even with O3 optimizations). Since the variable value should be undefined, LLVM was giving the correct behavior of using whatever was in that memory already (even though it's clearly not the desired result). I'd speculate something similar is going on with ParticleTests.

I did a quick test, and compiling Cocos2D with GCC-LLVM works correctly with issue 872."

JPEG Support for Python 2.7's PIL Module on OS X Lion

My PIL module refuse to process jpeg image. It says that there is no decoder jpeg on my system. It's no good  since I want to process that kind of file using PIL in future, and my older iPhoto picture on my 13 inch MacBook Pro is generally in jpeg format too.

Here the snapshot

Nugrohos-MacBook-Pro:olah gambar nugroho$ python 
Program Image Enchancement
Oleh Nugroho Adi Pramono
format awal: JPEG 2448x3264 RGB
konversi ke grayscale
Traceback (most recent call last):
File "", line 14, in
gbw = gb.convert("L")
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PIL/", line 679, in convert
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PIL/", line 189, in load
d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PIL/", line 385, in _getdecoder
raise IOError("decoder %s not available" % decoder_name)
IOError: decoder jpeg not available
Nugrohos-MacBook-Pro:olah gambar nugroho$

So I googling for it and found libjpeg at, download, exctract and install it using magic UNIX words ./configure, make, make install

Nugrohos-MacBook-Pro:~ nugroho$ cd Downloads/jpeg-8c/
Nugrohos-MacBook-Pro:jpeg-8c nugroho$ ./configure
Nugrohos-MacBook-Pro:jpeg-8c nugroho$ make
Nugrohos-MacBook-Pro:jpeg-8c nugroho$ make test
rm -f testout*
./djpeg -dct int -ppm -outfile testout.ppm ./testorig.jpg
./djpeg -dct int -bmp -colors 256 -outfile testout.bmp ./testorig.jpg
./cjpeg -dct int -outfile testout.jpg ./testimg.ppm
./djpeg -dct int -ppm -outfile testoutp.ppm ./testprog.jpg
./cjpeg -dct int -progressive -opt -outfile testoutp.jpg ./testimg.ppm
./jpegtran -outfile testoutt.jpg ./testprog.jpg
cmp ./testimg.ppm testout.ppm
cmp ./testimg.bmp testout.bmp
cmp ./testimg.jpg testout.jpg
cmp ./testimg.ppm testoutp.ppm
cmp ./testimgp.jpg testoutp.jpg
cmp ./testorig.jpg testoutt.jpg
Nugrohos-MacBook-Pro:jpeg-8c nugroho$ sudo make install

reinstall PIL

version 1.1.7
platform darwin 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]
--- TKINTER support available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
*** FREETYPE2 support not available
*** LITTLECMS support not available
To add a missing option, make sure you have the required
library, and set the corresponding ROOT variable in the script.

Friday, December 16, 2011

Ubuntu 11.10 Oneiric Ocelot On OS X Lion's VBox (NAT and Host-Guest Sharing Folder)

After installing Ubuntu 11.10 on Mac OS X Lion using VirtualBox, here first impression of Oneiric Ocelot

There is dock at left, like on Mac.

Network is works flawlessy, I can surf internet using firefox, its NAT configuration come by default while installing it.
From Oneiric Ocelot

Firefox run at fullscreen(I mean ubuntu screen), just like Lion's or iPad's Safari (Lion's version of firefox didn't auto fullscreen yet). We can windowed-mode-ed it by hovering mouse at top edge of screen, it'll show menu-bar too

Hover mouse at top
From Oneiric Ocelot
It's windowed firefox

From Oneiric Ocelot
 If we click dash home, we'll got launchpad like (just like iPad or Lion's launchpad). At second tab, there's apps available to download.

From Oneiric Ocelot

 To access shared folder on Lion named vbox, I opened terminal by clicking Dash home and type terminal on search box
From Oneiric Ocelot

 First create directory
aravir@aravir-VirtualBox:~$mkdir vbox

mount shared vbox on lion using this command
aravir@aravir-VirtualBox:~$sudo mount -t vboxsf vbox vbox 

at screenshot you know it generate error because ubuntu did'nt recognize vboxsf filesystem. To introduce it, guest addition must be installed.
From Oneiric Ocelot
From Oneiric Ocelot
From Oneiric Ocelot
From Oneiric Ocelot
Failed. Guest addition need root privilege.
aravir@aravir-VirtualBox:~$cd /Media/VBOXADDITIONS_4.1.6_74713
$sudo ./

After guest addition installed and the system restarted (it's support full screen on my Macbook monitor now), retype the command above, and done

 Vbox directory before mounted
From Oneiric Ocelot
After mounted
From Oneiric Ocelot

Thursday, December 15, 2011

Installing Python-2.7's Imaging Library Module on OS X Lion

PIL, as its name suggest, is an imaging library for python. I used PIL to get every pixel of an image as 2x2 array information. With that I could modify it with many possibilities; edge detection, black and white transformation, log transformation, creating watermark, etc.

{update: I install this PIL module on my OS X El Capitan too, :), and easier

Installing PIL is an easy task, if we have its prerequities installed. Just download it and extract it and then install using this command

Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$ python install
running install
running build
running build_py
creating build
creating build/lib.macosx-10.6-intel-2.7
unable to execute gcc-4.2: No such file or directory
error: command 'gcc-4.2' failed with exit status 1
Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$
Oops, it is failed to install, it tell me that there is no gcc-4.2 on my machine, and that's true. I've modified my /usr/bin/gcc to point /usr/local/bin/gcc.

I have gcc 4.2 from Xcode4.2, which actually llvm-gcc. My existing gcc is gcc-4.6.2 so I cheated… I created symlink named gcc-4.2 on /usr/bin pointing /usr/local/bin/gcc

Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$ ln -s /usr/local/bin/gcc /usr/bin/gcc-4.2
ln: /usr/bin/gcc-4.2: Permission denied
Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$ sudo ln -s /usr/local/bin/gcc /usr/bin/gcc-4.2
Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$

Still error, :(

gcc-4.2: error: x86_64: No such file or directory
gcc-4.2: error: unrecognized option ‘-arch’
gcc-4.2: error: unrecognized option ‘-arch’
error: command 'gcc-4.2' failed with exit status 1

Hm, maybe if I'm linking /usr/bin/gcc-4.2 to /usr/bin/llvm-gcc-4-2; it's gcc-4.2 after all, if we ignore llvm (don't know what is it stand for). It doesn't hurt if I'm trying, so..
Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$ sudo rm /usr/bin/gcc-4.2 
Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$ sudo ln -s /usr/bin/llvm-gcc-4.2 /usr/bin/gcc-4.2
Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$ python install
running install
running build
running build_py
running build_ext
version 1.1.7
platform darwin 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]
--- TKINTER support available
*** JPEG support not available
--- ZLIB (PNG/ZIP) support available
*** FREETYPE2 support not available
*** LITTLECMS support not available
creating /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PIL.pth
Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$

Wow, success 

Well, no need gcc4.6.2 afterall, just create symbolic link of llvm-gcc-4.2 named gcc-4.2,:)


Nugrohos-MacBook-Pro:Imaging-1.1.7 nugroho$ python
Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import image
Traceback (most recent call last):
File "", line 1, in
ImportError: No module named image
>>> import Image


Install GCC 4.6.2 on OS X Lion (success)

Still failed, for not able to access gcc-4.6.2 automatically (have to access ~/gcc462/bin), I install binary GCC from HPC. So I'm extracted gcc-lion.tar.gz. For my surprise, it's extracted with some hierarchy like usr/local/bin, usr/local/include, … and I supposed to copy it to root folder. In that case, my Xcode4.2's gcc would still intact because it's in /usr/bin .

 I wonder if all gcc compilation result'll stored to /usr/local if we didn't pass any parameter, so I checked my /usr/local/bin directory

Nugrohos-MacBook-Pro:/ nugroho$ cd usr/local/bin/
Nugrohos-MacBook-Pro:bin nugroho$ ls
2to3gfortran python-config
2to3-2.7 idle python2.7
c++ idle2.7 python2.7-32 x86_64-apple-darwin11.2.0-c++
cpp jcf-dump python2.7-config x86_64-apple-darwin11.2.0-g++
g++ pydoc pythonw x86_64-apple-darwin11.2.0-gcc
gcc pydoc2.7 pythonw-32 x86_64-apple-darwin11.2.0-gcc-4.6.2
gcj python pythonw2.7 x86_64-apple-darwin11.2.0-gcj
gcov python-32 pythonw2.7-32 x86_64-apple-darwin11.2.0-gfortran

There is gcc in it. Is in gcc-4.2?
Nugrohos-MacBook-Pro:bin nugroho$ ./gcc --version
gcc (GCC) 4.6.2
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO

Yes, it is gcc-4.6.2? So, I replace gcc symlink previously  pointed to /usr/bin/llvm-gcc to /usr/local/bin/gcc

Nugrohos-MacBook-Pro:bin nugroho$ which gcc
Nugrohos-MacBook-Pro:bin nugroho$ which llvm-gcc
Nugrohos-MacBook-Pro:bin nugroho$ sudo ln -s gc
gcc gcj gcov
Nugrohos-MacBook-Pro:bin nugroho$ sudo ln -s gcc /usr/bin/gcc
ln: /usr/bin/gcc: File exists
Nugrohos-MacBook-Pro:bin nugroho$ sudo mv /usr/bin/gcc /usr/bin/gccOLD
Nugrohos-MacBook-Pro:bin nugroho$ sudo ln -s gcc /usr/bin/gcc
Nugrohos-MacBook-Pro:bin nugroho$ gcc
gcc: fatal error: no input files
compilation terminated.
Nugrohos-MacBook-Pro:bin nugroho$ gcc --version
gcc (GCC) 4.6.2
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO

Nugrohos-MacBook-Pro:bin nugroho$
Hooray, HPC binary is left untouched, :)

Ubuntu 11.10 Oneiric Ocelot on OS X Lion via Virtual Box

It's long time since my MacBook Pro had ubuntu installed. Curious about new release of ubuntu, I decided to download .iso file via torrent network and installed it on my Mac via VirtualBox as I don't want to dual booting my Mac again (the way I did several years ago).

 I downloaded 64-bit version of Oneiric Ocelot and it's installed without problem.

 From screenshot below, we know ubuntu team has improved their installation method. While the system is busy copying file, we're prompted to fill our detail of instalation; keyboard, time zone, username. Such an efficient method.
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos

Wednesday, December 14, 2011

Installing GCC 4.6.2 on OSX Lion

After searching how to's, compiling from source, installing Snow Leopard version of Xcode (on its DVD) and installing light alternate gcc 4.2 version without success (or success but not satisfied), I  installed Xcode 4.2 on my OS X Lion. Alas, Apple ship its own GCC compiler, llvm-gcc, instead GCC. So I download tar.gz version of GCC-4.6.2 from GNU and try to install it
From Blogsy Photos
From Blogsy Photos
check to know what dependencies I don't have by typing


the result is

configure: error: Building GCC requires GMP 4.2+, MPFR 2.3.1+ and MPC 0.8.0+.

So, I download it mpc (, mpfr( and gmp( I don't know why gmp's download always ended by error, duh. Trying to 'torrenting' it via burnbit but still get error. I was forced to use ftp connection via Finder (Command-K) and done. Installing these dependencies is easy task, just unzip/untar these archive, cd to its directory and type three magical UNIX installation words.

$sudo make install

OK, now it's GCC time. Extract GCC zipped file, cd to its directory

sudo make install

You can add make command to make -j 4 if you have multicore processor and want to make process processed in parallel. "Make" process is very long time process.
Look at gnumake, cc1 , sh , and llvm-gcc-4.2 processes. They're processed in parallel.
From Blogsy Photos
From Blogsy Photos
From Blogsy Photos

 OMG, after long awaiting time, I got an error, something about libgfortran. (update: it's succeed indeed despite of error, it actually compiled gcc but not in Lion path, so Lion's still use llvm-gcc version , I post the update here) After a minute of thinking, I decide to compile just C for now, and build on separate directory and output-ed it on my home directory

Nugrohos-MacBook-Pro:gcc-4.6.2 nugroho$ mkdir build
Nugrohos-MacBook-Pro:gcc-4.6.2 nugroho$ cd build
Nugrohos-MacBook-Pro:build nugroho$ ../configure --prefix=$HOME/gcc462 --enable-languages=c

These command will build GCC on 'build' directory and store the compilation result on gcc462 directory on my home folder. If you are interested in building only a limited set of languages, just like me, you could also specify this option in the configure line. For example if you need only C, C++ and Fortran just append this to the above line: --enable-languages=c,c++,fortran

Monday, December 12, 2011

Lorenz Attractor using Python 2.7 and Vpython Module on Mac OS X Lion

From Blogsy Photos
Lorenz attractor's generated by three nonlinear simultaneous equation.




We can play with a,b and c to see the effect.

Here the code to visualize Lorenz attractor on Python. We need VPython module to visualize it.

from visual import *
from operator import mod
while jl < n:
sphere(pos=(x0,y0,z0),radius=r, color=(rd,1,rd))

Since Vpython's not support 64bit platform, we must execute the code using 32-bit python like this

Nugrohos-MacBook-Pro:cellular nugroho$ python2.7-32

Here the result
From Blogsy Photos

The Journey of Installing Matplotlib Python on Mac OS X Lion (continued)

To install Matplotlib, I have to install numpy first. To install numpy, I need GCC. Lion installer package didn't come with XCode, it has to be downloaded separately from MacAppStore for free. I don't dare to even trying it with my sluggish itnternet connection, so I tried others possibility without success untill I found my SnowLeopard DVD.

Finally, I am able to install GCC. I used XCode 3.2 on Snow Leopard DVD in Lion, :). So, the journey is continue…

Check (just for show off, :))

Nugrohos-MacBook-Pro:mysite nugroho$ gcc
gcc         gcc-4.0     gcc-4.2     gccmakedep  
Nugrohos-MacBook-Pro:mysite nugroho$ gcc

Now install numpy, oh no… look at this.

Last login: Sun Dec 11 19:11:11 from
Nugrohos-MacBook-Pro:mysite nugroho$ pip install numpy
Downloading/unpacking numpy
  Downloading numpy-1.6.1.tar.gz (2.6Mb): 2.6Mb downloaded
  Running egg_info for package numpy
    Running from numpy source directory.non-existing path in 'numpy/distutils': 'site.cfg'
    F2PY Version 2
        extra_link_args = ['-Wl,-framework', '-Wl,Accelerate']
        define_macros = [('NO_ATLAS_INFO', 3)]
        extra_compile_args = ['-faltivec', '-I/System/Library/Frameworks/vecLib.framework/Headers']

    building extension "numpy.core._sort" sources
      adding 'build/src.macosx-10.6-intel-2.7/numpy/core/include/numpy/config.h' to sources.
      adding 'build/src.macosx-10.6-intel-2.7/numpy/core/
    building extension "numpy.core.multiarray" sources
      adding 'build/src.macosx-10.6-intel-2.7/numpy/core/include/numpy/config.h' to sources.

error: could not delete '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/': Permission denied

It's look like my gcc think it's on Snow Leopard platform, :(. But, there is small hope; the error warning just mentions permission, hm, how about sudo?

ok, let's try again

Nugrohos-MacBook-Pro:mysite nugroho$ sudo pip install numpy
Downloading/unpacking numpy
  Running egg_info for package numpy
    Running from numpy source directory.non-existing path in 'numpy/distutils': 'site.cfg'

      adding 'build/scripts.macosx-10.6-intel-2.7/f2py' to scripts
    changing mode of /Library/Frameworks/Python.framework/Versions/2.7/bin/f2py to 755
Successfully installed numpy
Cleaning up...
Nugrohos-MacBook-Pro:mysite nugroho$ 

hm, still in doubt

Nugrohos-MacBook-Pro:mysite nugroho$ python
Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy

(don't know if it works as it compiled using GCC designed for Snow Leopard. At least no news is good news, :) )

So here it is

Nugrohos-MacBook-Pro:mysite nugroho$ pip install matplotlib
Downloading/unpacking matplotlib
  Downloading matplotlib-1.0.1.tar.gz (13.3Mb): 13.3Mb downloaded

            matplotlib: 1.0.1
                python: 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
                        [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]
              platform: darwin
                 numpy: 1.6.1
             freetype2: found, but unknown version (no pkg-config)
                        * WARNING: Could not find 'freetype2' headers in any
                        * of '.', './freetype2'.
                libpng: found, but unknown version (no pkg-config)
                        * Could not find 'libpng' headers in any of '.'
Command python egg_info failed with error code 1
Storing complete log in /Users/nugroho/.pip/pip.log
Nugrohos-MacBook-Pro:mysite nugroho$ 

Hm, still long way to go, have to install freetype2 and lbpng. Ugh…

Sunday, December 11, 2011

Creating Django Apps on OS X Lion 10.7.2

As this is my first time using Django, I have to take care of some initial setup. Namely, I’ll need to auto-generate some code that establishes a Django project – a collection of settings for an instance of Django, including database configuration, Django-specific options and application-specific settings.

From the command line, cd into a directory where you’d like to store your code, I use my python directory,then run the following command: startproject mysite
This will create a mysite directory in my python. Here tho result.
Nugrohos-MacBook-Pro:python nugroho$ pwd
Nugrohos-MacBook-Pro:python nugroho$ ls distribute-0.6.24.tar.gz graphy graphy.pyc
Nugrohos-MacBook-Pro:python nugroho$ startproject mysite
Nugrohos-MacBook-Pro:python nugroho$ ls distribute-0.6.24.tar.gz graphy graphy.pyc mysite
Nugrohos-MacBook-Pro:python nugroho$ cd mysite/
Nugrohos-MacBook-Pro:mysite nugroho$ ls
Nugrohos-MacBook-Pro:mysite nugroho$
These files in mysite directory are: An empty file that tells Python that this directory should be considered a Python package. (Read more about packages in the official Python docs if you're a Python beginner.) A command-line utility that lets you interact with this Django project in various ways. You can read all the details about in and Settings/configuration for this Django project. Django settings will tell you all about how settings work. The URL declarations for this Django project; a "table of contents" of your Django-powered site. You can read more about URLs in URL dispatcher.
To verify that it works do this
Nugrohos-MacBook-Pro:mysite nugroho$ python runserver
Validating models...

0 errors found
Django version 1.3.1, using settings 'mysite.settings'
Development server is running at
Quit the server with CONTROL-C.
Yup, it works…
Try to access with your browser, :)
Here screenshot from Safari on my Lion

From Blogsy Photos

If we want to show off on other computer, use command below. It will listen on all public IP's

Nugrohos-MacBook-Pro:mysite nugroho$ python runserver
Validating models...

0 errors found
Django version 1.3.1, using settings 'mysite.settings'
Development server is running at
Quit the server with CONTROL-C.

Here screenshot from my iPad

Django Python Module on OS X Lion 10.7.2

As python programmer, I wish I could build a web using it too. I used to use CMS based portal, but eventually I want python thing in my site. Fortunately, it can be done, using Django.

According it site, Django ( is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

Developed by a fast-moving online-news operation, Django was designed to handle two challenges: the intensive deadlines of a newsroom and the stringent requirements of the experienced Web developers who wrote it. It lets you build high-performing, elegant Web applications quickly.

So I finally give it a try, it isn't hurt anyway, :). Installing Django in my Python 2.7 on my 13' Macbook Pro with OS X Lion 10.7.2 is fairly easy, using pip from pypi ( All I have to do is typing in terminal: pip install django. Of course, we need pip to be installed first.

Nugrohos-MacBook-Pro:python nugroho$ pip django

pip: error: No command by the name pip django
(maybe you meant "pip install django")
Nugrohos-MacBook-Pro:python nugroho$ pip install django
Downloading/unpacking django
Downloading Django-1.3.1.tar.gz (6.5Mb): 6.5Mb downloaded
Running egg_info for package django

Installing collected packages: django
Running install for django
changing mode of build/scripts-2.7/ from 644 to 755

changing mode of /Library/Frameworks/Python.framework/Versions/2.7/bin/ to 755
Successfully installed django
Cleaning up...
Nugrohos-MacBook-Pro:python nugroho$python
Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import django
>>> print django.get_version()
>>> exit()
Nugrohos-MacBook-Pro:python nugroho$

That's it.

Double Tap Dragging on Lion

I wrote about missing single-tap-hold on Lion to dragging. However, after googling around, I found that it's still has capability to do it, just you will find it at the most unpredictable place in System Preferences

To enable one finger drag by double-tap-hold, go to System Preferences, click on Universal Access, and then the Mouse & Trackpad tab. Click on the “Trackpad Options…” at the bottom section of window. Enable dragging option; we can select the desired dragging behaviour from the drop down list. I wonder why this preference is here, not on trackpad section instead.

From Blogsy Photos

Lion have more Finger Gesture than Snow Leopard

Migrating from Snow Leopard to Lion is confusing and annoying but fun experience. One feature of Lion that I noticed very much is new finger gesture as it's a whole different experience than Snow Leopard.

I noticed first bad feeling when I browsing through Safari and can't double-tap-hold todragging a text to highlight it. I think, oh my God, my trackpad is broken. Calming down, go to preferences panel. I can't find double tap option, hm. Drag n Drop now can be done by three finger, uh. Highlighting text using three finger seems wrong to me. So, no double-tap-hold. (edit: there is double-tap-hold )

Two finger gesture to scroll and zoom is intact. Hm, not really. Scroll direction now has default option to 'natural', iPad like scroll.

No Exposé or Space, just Mission Control. Mission Control contain apps on current active desktop, just like Exposé, and all full screen apps, including other desktop.

Sweeping down four finger now show windows from same apps while sweeping up bring us to Mission Control. Sweeping left or right will bring us to next full screen apps (Desktop's treated as fullscreen apps).

A new gesture is pinching with four finger; pinching down will bring up Launchpad, an apps list just like iOS. A reverse pinching, spread (not sure what it's named), will push all windows to side to show Desktop.

I'm a bit missing the time when I could switch apps by sweeping down my four finger. Moving apps through spaces has gone too, but I guess it's a sacrifice to be able jump too next step.

The Journey of Installing Matplotlib Python Module on OS X Lion

I need matplotlib to plot my python output when I am running my output function generator python code.

This post is a log of what I did to being able to install matplotlib 1.1.0 on python 2.7.2 on my Mac OS X Lion 10.7.2. Yet, it's unfinished job.

First, googling for matplotlib, sourceforge is official home fon it, but it's very slow, I coudn't even open download page with my sluggish connection. So, I searching other source.

Got it from, it has pypi repositories, but when it opened, there is no package, just blank folder.

After further googling, I finally found, pypi stand for python package index.

To be able to use pypi package, we have to install pip first, but before that install distribute using this command

curl | python
curl | python

and then install matplotlib using pip, there is download activity, but got error at the end; must install numpy first, but it got error too as I didn't have GCC on my lion yet, aaarrrgghh... So, the hell of dependencies is begin...

So here I am, searching for 'light' GCC for my lion. I know I should install XCode 4 from Apple , it's free anyway, but I must face the fact that it's including 4.5GB download job, such a tedious job and wasting time; I just want to install 13 MB matplotlib.

I wish I can type the code below

pip install numpy
pip install matplotlib


Monday, December 5, 2011

Grapher on Mac OS X

Any wonder how "x power ten" curve is? Well, maybe not, we know that equation is just another parabolic like curve. But how about (x^3-3x)/(4x-3)? Maybe little calculation could help. How about e^x-x^2... (oh my God, WHAT IN EARTH YOU'RE TRYING TO SAY?)

It begin when I bought my first Mac. I realized that we could search anything using spotlight, even application and web.

Someday (forget where and when), when I surfing on internet for solution of mathematic function, I got a page full of wonderfull snapshot of exotic function on 3D with standart cartesian system, rotateable, etc. And it's said that OS X's Grapher did that. So I am Command-Space-ing my mac and voila... There's Grapher, apps I never know exist on my mac did appear.

Grapher have capability to draw almost any kind of equation. It can draw an equation in 3D or 2D. We can draw parametric function in Grapher as well.

Yeah, Grapher is, at least for me, hidden functional application brought by OS X.

The best of all, it's free, :)

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