init.py

# This is startup file for interactive python.
# It is not automatically loaded by python interpreter.
# To instruct the interpreter to load it insert the following commands
# into your .profile (use whatever syntax and initialization file
# is appropriate for your shell):
#
# PYTHONSTARTUP=$HOME/init.py # or where you have really put it
# export PYTHONSTARTUP
#
# Due to nested_scopes and pydoc.help(*args, **kwds) this file only works with
# Python 2.1 or higher.
#
# Text version here
#
# Generated by gvim :runtime syntax/2html.vim
#

# This is startup file for interactive python.
# It is not automatically loaded by python interpreter.
# To instruct the interpreter to load it insert the following commands
# into your .profile (use whatever syntax and initialization file
# is appropriate for your shell):
#
# PYTHONSTARTUP=$HOME/init.py # or where you have really put it
# export PYTHONSTARTUP
#
# Due to nested_scopes and pydoc.help(*args, **kwds) this file only works with
# Python 2.1 or higher.

from __future__ import nested_scopes

def init():
    import sys, os
    import __builtin__

    if not hasattr(__builtin__, "help"): # Python 2.2 has already got this
        # From Guido van Rossum,
        # http://www.onlamp.com/pub/a/python/2001/06/14/pythonnews.html

        import pydoc

        class _Helper:
            def __repr__(self):
                return "Please type help() for interactive help."

            def __call__(self, *args, **kwds):
                return pydoc.help(*args, **kwds)

        __builtin__.help = _Helper()

    pyreadlinewin32_startup = os.path.join(sys.prefix,
        "lib", "site-packages", "pyreadline", "configuration", "startup.py")

    if os.path.exists(pyreadlinewin32_startup):
        execfile(pyreadlinewin32_startup)

    else:
        # From Bruce Edge

        try:
            import rlcompleter, readline
            initfile = os.path.expanduser("~/.inputrc")
            readline.read_init_file(initfile)

            histfile = os.path.expanduser("~/.python-history")
            try:
                readline.read_history_file(histfile)
            except IOError:
                pass # No such file

            def savehist():
                histfilesize = os.environ.get('HISTFILESIZE') or \
                               os.environ.get('HISTSIZE')
                if histfilesize:
                    try:
                        histfilesize = int(histfilesize)
                    except ValueError:
                        pass
                    else:
                        readline.set_history_length(histfilesize)
                readline.write_history_file(histfile)

            import atexit
            atexit.register(savehist)

        except (ImportError, AttributeError):
            pass # no readline or atexit, or readline doesn't have
                  # {read,write}_history_file - ignore the error

    # From Peter Norvig

    from datetime import datetime
    now = datetime.now

    home = os.path.expanduser('~')
    user = os.environ.get('LOGNAME', 'UNKNOWN')

    from socket import gethostname
    host = gethostname().split('.')[0]

    class Prompt(object):
        def __init__(self, str='%(cwd)s\n%(user)s@%(host)s [%(time)s] %(n)d >>> '):
            self.str = str
            self.n = 0

        def __str__(self):
            cwd = os.getcwd()
            if cwd.startswith(home):
                cwd = cwd.replace(home, '~')

            self.n += 1
            return self.str % {
                'cwd': cwd,
                'user': user,
                'host': host,
                'time': now().strftime('%H:%M'),
                'n': self.n,
            }

        #def __radd__(self, other):
        #    return str(other) + str(self)

    term = os.environ.get("TERM")
    if 'linux' in term:
        background = 'dark'
    else:
        background = os.environ.get('BACKGROUND', 'light').lower()

    # From Randall Hopper

    for _term in ["linux", "term", "rxvt", "vt100", "screen"]:
        if _term in term:
            if background == 'dark':
                ps1_color = '3' # yellow
                stdout_color = '7' # bold white
            else:
                ps1_color = '4'  # blue
                stdout_color = '0' # bold black

            sys.ps1 = Prompt("%%(cwd)s\n%%(user)s@%%(host)s [%%(time)s] %%(n)d \001\033[3%sm\002>>>\001\033[0m\002 " % ps1_color)
            #sys.ps1 = "%(cwd)s\n%(user)s@%(host)s \001\033[3%sm\002>>>\001\033[0m\002 " % ps1_color
            sys.ps2 = "\001\033[1;32m\002...\001\033[0m\002 " # bold green

            # From Denis Otkidach

            class ColoredFile:
                def __init__(self, fp, begin, end='\033[0m'): # reset all attributes
                    self.__fp = fp
                    self.__begin = begin
                    self.__end = end

                def write(self, s):
                    self.__fp.write(self.__begin+s+self.__end)

                def writelines(self, lines):
                    map(self.write, lines)

                def __getattr__(self, attr):
                    return getattr(self.__fp, attr)

            sys.stdout = ColoredFile(sys.stdout, '\033[1;3%sm' % stdout_color)
            sys.stderr = ColoredFile(sys.stderr, '\033[31m') # red

            break

    else:
        sys.ps1 = Prompt()

    try:
        import locale
    except ImportError:
        pass # locale was not compiled
    else:
        try:
            locale.setlocale(locale.LC_ALL, '')

            from pprint import pprint

            def displayhook(value):
                if value is not None:
                    __builtin__._ = value
                    pprint(value)

            sys.displayhook = displayhook

        except (ImportError, locale.Error):
            pass # no locale support or unsupported locale

    # From: Paul Magwene

    class DirLister:
        def __getitem__(self, key):
            s =  os.listdir(os.getcwd())
            return s[key]

        def __getslice__(self,i,j):
            s =  os.listdir(os.getcwd())
            return s[i:j]

        def __call__(self, path=os.getcwd()):
            path = os.path.expanduser(os.path.expandvars(path))
            return os.listdir(path)

        def __repr__(self):
            return str(os.listdir(os.getcwd()))

    class DirChanger:
        def __init__(self, path=os.getcwd()):
            self(path)

        def __call__(self, path=os.getcwd()):
            path = os.path.expanduser(os.path.expandvars(path))
            os.chdir(path)

        def __repr__(self):
            return os.getcwd()

    global ls, cd
    ls = DirLister()
    cd = DirChanger()

    # From Thomas Heller
    #
    #import pdb
    #
    #def info(*args):
    #   pdb.pm()
    #sys.excepthook = info

    class Pwd:
        def __call__(self):
            return repr(self)

        def __repr__(self):
            return os.getcwd()

    global pwd
    pwd = Pwd()

    class _Exit:
        def __repr__(self):
            sys.exit()

        def __call__(self, msg=None):
            sys.exit(msg)

    global x
    x = _Exit()

    if isinstance(__builtin__.exit, str): # In Python 2.5+ exit and quit are objects
        global exit, quit
        exit = quit = x

init()
del init
del nested_scopes

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