Every day new step

FastFix: current transaction is aborted, commands ignored until end of transaction block

lin80h — Mon, 05 Oct 2009 11:04:00 +0000

This error was discovered when giving uncorecct data to page writen in django. After sending uncorrect data all pages that using this database module showing this error.I have used psycopg2 for database connection. Fast fix i writed is:
db = psycopg2.connect() c = db.cursor(); c.execute("COMMIT;") c.close()

send commit after opening database connection and previos transactions will be closed

Calcualte whery big numbers

lin80h — Fri, 02 Oct 2009 15:14:50 +0000

There was problem. int,longint and other types is to small to calculate combinations C(n,m) and used google
GNU Multiple Precision Arithmetic Library

Function calculates combinations and then find module of it by dividing on d
Here is C code that i wrote:
unsigned int CombDiv( unsigned int n , unsigned int m , unsigned int d ) { long li; mpz_t tmp1,tmp2,tmp3; mpz_init( tmp1 ); mpz_init( tmp2 ); mpz_init( tmp3 ); mpz_fac_ui( tmp1 , m-n ); mpz_fac_ui( tmp2 , n ); mpz_mul( tmp3 , tmp1 , tmp2 ); mpz_fac_ui( tmp2 , m ); mpz_divexact( tmp1 , tmp2 , tmp3 ); li = mpz_mod_ui( tmp2 , tmp1 , d ); mpz_clear( tmp1 ); mpz_clear( tmp2 ); mpz_clear( tmp3 ); return li; }

PostGRES select and count unique day events

lin80h — Wed, 30 Sep 2009 05:37:05 +0000

Problem: I wanted to have event table where i select rows by month. And i where searching way to count unique days and get number of that days

SELECT DISTINCT ON (events."Date") COUNT(*),events."Date" FROM events WHERE EXTRACT(MONTH FROM( COALESCE(events."Date",CURRENT_DATE) ) ) = 9 AND EXTRACT(YEAR FROM( COALESCE(events."Date",CURRENT_DATE) ) ) = 2009 GROUP BY events."Date"

It take me many houres to get this line of SQL code.

Python HTML calendar

lin80h — Mon, 28 Sep 2009 13:23:20 +0000

I had work task calendar in python for html. Link

HTML img with base64

lin80h — Tue, 22 Sep 2009 07:52:13 +0000

One guy asked me if there is way to insert image in internal HTML code without links in html code. In first moment i answered now and where had many arguments that it is imposible. Then he after some hours of googling havent found any thing. After chating with other guy he told about base64 and img.

Here is example Insert this code in > and all will work


data:image/png;base64,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


It is way how to insert base64 converted image in your html code without external links or files.



Python Django Problem
lin80h — Mon, 21 Sep 2009 11:55:05 +0000
I wanted to upload image save as temp file. Then with PIL resize saved image and save it in database. Problem where in that when checked request.FILES['image'].size image size was correct but after i save it
file = tempfile.NamedTemporaryFile( suffix=".png" )

file.write(request.FILES['image'].size)
and checked with
os.path.getsize()
size was different from expected and PIL library don’t worked with saved file. And I reorganized code to :
fname = ""

file = tempfile.NamedTemporaryFile( suffix=".png" )

fname = file.name

file.close()

f = open( fname , "wb" )

f.write( request.FILES['image'].read() )

f.close()

img = Image.open( fname )

img.load()

img.thumbnail( (image_size) , Image.ANTIALIAS )

img.save( fname )
and all works fine. May be not the fastest way but its easy.

         


Using rsync to Mirror Directories
lin80h — Sat, 19 Sep 2009 06:09:04 +0000
I where thinkig about copying all files to server, but there was the same dir and simple Ctrl+C Ctrl+V is’t good way espesialy if there is 6000 files and time to time You ask skip or copy. There is button “Yes to All” but it is too complicated. I wanted the write some line and all works.

Link

         


Find Unique Values in PostGres
lin80h — Thu, 17 Sep 2009 12:38:19 +0000
From message board.

Link

         


JavaScript Calendar
lin80h — Mon, 14 Sep 2009 11:24:55 +0000
JS Calendar example

         


Convert
lin80h — Thu, 10 Sep 2009 18:33:02 +0000
Comand conver I have used to convert pdf file to jppg file collection

convert file.pdf files.jpg

This command uses imageMagick

Link to page