updateln.py

A Python script to update links under a path to use new prefix.

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os, sys, getopt;
options = {'start': None, 'oprefix': None, 'nprefix': None, 'simulate': True};

class PathError (Exception):
  pass;

def ShowUsage():
  progname = os.path.split(sys.argv[0])[1];
  print progname;
  print '-'*len(progname)
  print " Usage: %s [-w] [-s startpath] -o oldprefix -n newprefix\n" % progname;
  print " Parameters: "
  print " -w, --write       Dont run the program run in simulation mode.\n";
  print " -s, --start-path  Use custom starting directory.\n";
  print " -o, --old-prefix  Find link(s) with prefix as specified by this parameter.\n";
  print " -n, --new-prefix  New prefix for the offending link(s) to use.\n";
####  

def GetOptions():
  global options;
  ret = 0;

  arguments = sys.argv[1:];

  try:
    wnt, dummy = getopt.getopt(arguments, "o:n:s:w", ["old-prefix=",
                    "new-prefix=", "start-path=", "write"]);
    for name, val in wnt:
      if name in ('-o', '--old-prefix'):
        options['oprefix'] = val;
      elif name in ('-n', '--new-prefix'):
        options['nprefix'] = val;
      elif name in ('-s', '--start-path'):
        options['start'] = val;
      elif name in ('-w', '--write'):
        options['simulate'] = False;
    ##

    if options['start'] == None:
      options['start'] = os.getcwd();
  except getopt.GetoptError:
    ret = -1;
  ##

  if (options['oprefix'] == None) or (options['nprefix'] == None): ret = -1;
  if ret != -1:
    print "Start      : %s" % options['start'];
    print "Old prefix : %s" % options['oprefix'];
    print "New prefix : %s" % options['nprefix'];
    if options['simulate'] == False:  print "WARNING    : This program may change links.";
    print;
  ##

  return ret;
####

def ProcessPath(curPath, recursive):
  proccount = 0;
  files = os.listdir(curPath);

  if len(files) > 0:
    print "Examining %s" % curPath;

  for entry in files:
    curFile = os.path.join(curPath, entry);

    if os.path.islink(curFile):
      linkPath = os.readlink(curFile);
      if linkPath.find(options['oprefix']) == 0:
        # we need to update this one
        newLinkPath = linkPath.replace(options['oprefix'], options['nprefix'],
                                      1);
        print "Fixing %s\n   Old path: %s\n   New path: %s" % (curFile,
          linkPath, newLinkPath);

        if options['simulate'] == False:
          # these two lines will modify/regenerate the symbolic link
          os.unlink(curFile);
          os.symlink(newLinkPath, curFile);
          proccount += 1;
        ##
      else:
        # good link, skip it
        pass;
    elif os.path.isdir( curFile ) and recursive:
      proccount += ProcessPath(curFile, recursive);
  ##    

  return proccount;
####

def main():
    if GetOptions() == 0:
      i = ProcessPath(options['start'], True);
      print;
      print ["Nothing processed by this program", \
             "There are %s link(s) processed" % i][i > 0] + '.';
    else:
      ShowUsage();
####

if __name__ == '__main__':
    main();
##

kidsxp_ico2png.py

Because I got ICO files and I want them in PNG.

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os, glob

# location of the files
sourceDir = "/media/yamazaki/Work/Pictures/Icons/KidsXP/"
# output directory
targetDir = "/tmp/kidsxp_png/"
# the real processor of this script: imagemagick
convertCmd = "convert %s[9] -resize %s %s"
# which categories to process? all of 'em?
processDirs = ("actions", "apps", "devices", "filesystems", "mimetypes")
# extract it and move into known usable sizes
knownSizes = ('16x16', '22x22', '32x32', '48x48', '64x64', '96x96', '128x128')

def processDir(path, thissize):
  print "Processing source path : %s" % path
  dummy, category = os.path.split(path)

  for item in glob.glob(path + '/*.ico'):
    dummy, itemName = os.path.split(item)
    tgtDir = os.path.join(targetDir, thissize, category, '')
    tgtName = itemName[:-3] + 'png' # "xyz.ico" filename to "xyz.png"

    print "Writing %20s -> %s" % (itemName, tgtDir + tgtName)
    if not os.path.exists(tgtDir):
      os.makedirs(tgtDir)

    cmd = convertCmd % (item, thissize, tgtDir + tgtName)

    # execute
    os.system(cmd)  # ooh! the horror!!
  ##
  print
##

for item in processDirs:
  s = sourceDir + item
  if os.path.isdir(s):
    for size in knownSizes:
      processDir(s, size)
  else:
    print "Skipping %s" % (s)
##

wxPrintPreview HTML on my own frame (w/o wxPreviewFrame)

I’m in the mood to dump a few code. Here’s a small code to use user’s frame, for some reason, to preview a printout.

import wx
import wx.html

sHTML = \
"""
    <h1>Hello world!</h1>
"""

class PrintPreviewFrame (wx.Frame):

  def __init__(self, *args, **kwds):
    global sHTML
    wx.Frame.__init__(self, *args, **kwds)

    self.PO = wx.html.HtmlPrintout()
    self.PO.SetStandardFonts()
    self.PO.SetMargins()

    self.PPreview = wx.PyPrintPreview(self.PO, self.PO)
    self.PreviewC = wx.PreviewCanvas(self.PPreview, self)

    self.PO.SetHtmlText(sHTML)
    self.PPreview.AdjustScrollbars(self.PreviewC)
    self.PPreview.SetCanvas(self.PreviewC)
  ####
####

app = wx.PySimpleApp()
frm = PrintPreviewFrame(None)
frm.Show()
app.MainLoop()

*shiver*