"""

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The objects used by the site module to add custom builtins.

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"""

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# Those objects are almost immortal and they keep a reference to their module

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# globals. Defining them in the site module would keep too many references

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# alive.

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# Note this means this module should also avoid keep things alive in its

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# globals.

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import sys

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class Quitter(object):

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def __init__(self, name, eof):

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self.name = name

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self.eof = eof

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def __repr__(self):

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return 'Use %s() or %s to exit' % (self.name, self.eof)

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def __call__(self, code=None):

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# Shells like IDLE catch the SystemExit, but listen when their

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# stdin wrapper is closed.

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try:

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sys.stdin.close()

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except:

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pass

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raise SystemExit(code)

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class _Printer(object):

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"""interactive prompt objects for printing the license text, a list of

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contributors and the copyright notice."""

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MAXLINES = 23

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def __init__(self, name, data, files=(), dirs=()):

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import os

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self.__name = name

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self.__data = data

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self.__lines = None

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self.__filenames = [os.path.join(dir, filename)

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for dir in dirs

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for filename in files]

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def __setup(self):

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if self.__lines:

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return

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data = None

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for filename in self.__filenames:

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try:

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with open(filename, "r") as fp:

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data = fp.read()

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break

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except OSError:

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pass

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if not data:

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data = self.__data

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self.__lines = data.split('\n')

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self.__linecnt = len(self.__lines)

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def __repr__(self):

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self.__setup()

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if len(self.__lines) <= self.MAXLINES:

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return "\n".join(self.__lines)

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else:

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return "Type %s() to see the full %s text" % ((self.__name,)*2)

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def __call__(self):

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self.__setup()

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prompt = 'Hit Return for more, or q (and Return) to quit: '

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lineno = 0

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while 1:

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try:

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for i in range(lineno, lineno + self.MAXLINES):

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print(self.__lines[i])

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except IndexError:

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break

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else:

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lineno += self.MAXLINES

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key = None

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while key is None:

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key = input(prompt)

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if key not in ('', 'q'):

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key = None

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if key == 'q':

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break

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class _Helper(object):

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"""Define the builtin 'help'.

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This is a wrapper around pydoc.help that provides a helpful message

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when 'help' is typed at the Python interactive prompt.

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Calling help() at the Python prompt starts an interactive help session.

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Calling help(thing) prints help for the python object 'thing'.

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"""

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def __repr__(self):

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return "Type help() for interactive help, " \

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"or help(object) for help about object."

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def __call__(self, *args, **kwds):

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import pydoc

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return pydoc.help(*args, **kwds)

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