DZone Snippets: module code

Unix Console Styler

kedare (Mathieu Poussin) — Wed, 28 Nov 2007 19:21:49 GMT

This modue can be used to apply many style on Unix* terminals



# Unix Console Style

# You can use this module to apply a style on the terminal

#

# DON'T WORK ON WINDOWS (Only on *nix Terminal)



module UnixConsoleStyler

  class StyleNotFoundException < Exception; end

  

  # Availables Styles

  STYLE = {

      :default    =>    "\033[0m",

    	# styles

    	:bold       =>    "\033[1m",

    	:underline  =>    "\033[4m",

    	:blink      =>    "\033[5m",

    	:reverse    =>    "\033[7m",

    	:concealed  =>    "\033[8m",

    	# font colors

    	:black      =>    "\033[30m", 

    	:red        =>    "\033[31m",

    	:green      =>    "\033[32m",

    	:yellow     =>    "\033[33m",

    	:blue       =>    "\033[34m",

    	:magenta    =>    "\033[35m",

    	:cyan       =>    "\033[36m",

    	:white      =>    "\033[37m",

    	# background colors

    	:on_black   =>    "\033[40m", 

    	:on_red     =>    "\033[41m",

    	:on_green   =>    "\033[42m",

    	:on_yellow  =>    "\033[43m",

    	:on_blue    =>    "\033[44m",

    	:on_magenta =>    "\033[45m",

    	:on_cyan    =>    "\033[46m",

    	:on_white   =>    "\033[47m" }

  

  # Methods to use if you want to apply a style

  def UnixConsoleStyler::apply_style(style)

    if STYLE.has_key? style

      STDOUT.write STYLE[style]

    else

      raise StyleNotFoundException, "Style #{style} not found"

    end

  end

  

end

Convert Unicode codepoints to UTF-8 characters with Module#const_missing

ntk () — Sat, 15 Sep 2007 12:25:16 GMT

From: http://www.davidflanagan.com/blog/2007_08.html#000136
Author: David Flanagan





# This module lazily defines constants of the form Uxxxx for all Unicode

# codepoints from U0000 to U10FFFF. The value of each constant is the

# UTF-8 string for the codepoint.

# Examples:

#   copyright = Unicode::U00A9

#   euro = Unicode::U20AC

#   infinity = Unicode::U221E

#

module Unicode

  def self.const_missing(name)  

    # Check that the constant name is of the right form: U0000 to U10FFFF

    if name.to_s =~ /^U([0-9a-fA-F]{4,5}|10[0-9a-fA-F]{4})$/

      # Convert the codepoint to an immutable UTF-8 string,

      # define a real constant for that value and return the value

      #p name, name.class

      const_set(name, [$1.to_i(16)].pack("U").freeze)

    else  # Raise an error for constants that are not Unicode.

      raise NameError, "Uninitialized constant: Unicode::#{name}"

    end

  end

end





puts copyright = Unicode::U00A9

puts euro = Unicode::U20AC

puts euro = Unicode::U20AC

puts infinity = Unicode::U221E

puts Unicode.const_get(:U221E)

p Unicode.constants

puts Unicode.constants

Unicode.constants.each { |u| puts Unicode.const_get(u) }

Using path module

korakot (Korakot Chaovavanich) — Sat, 01 Oct 2005 19:39:09 GMT

Here's an example codes using path module.
You first need to download it here: path.py



# make some files excutable

d = path('/usr/home/guido/bin')

for f in d.files('*.py'):

    f.chmod(0755)



# Directory walking - delete Emacs backup files

d = path(os.environ['HOME'])

for f in d.walkfiles('*~'):

    f.remove()

Using os.path is difficult. I can hardly remember how to
use which method. Need to lookup the manual every time.
This path module is much much easier to use.
I've heard it will be included in python 2.5 as well.