def test_getpager_with_stdin_none(self):
     previous_stdin = sys.stdin
     try:
         sys.stdin = None
         pydoc.getpager() # Shouldn't fail.
     finally:
         sys.stdin = previous_stdin

 def __init__(self, *args, **kwargs):
     super().__init__(*args, **kwargs)
     self.buffer = []
     self.pager = pydoc.getpager()
     self.stdout_write = sys.stdout.write
     self.stderr_write = sys.stderr.write
     sys.stdout.write = self.write
     sys.stderr.write = self.direct_write
     if 'LESS' not in os.environ:
         os.environ['LESS'] = '-FSRX'
     global PAGER
     PAGER = self

	def print_out(self, txt):
		import curses
		txt = txt.replace("`$","\n")
		#txt = txt.replace("`$","")
		win=curses.initscr()
		max_x, max_y = win.getmaxyx()
		curses.endwin()
		if len(txt.split("\n")) > max_x:
			pager = pydoc.getpager()
			try:
				pager(txt)
			except (EOFError, KeyboardInterrupt), e:
				pass

 def run(self):
     _stream_tracker.stdout = self.connection
     _stream_tracker.stderr = self.connection
     _stream_tracker.stdin = self.connection
     # Note that this is being called after we've swapped out stdout, so
     # it'll give us back a plain pager
     _stream_tracker.pager = pydoc.getpager()
     try:
         self.interact(BANNER)
     except SystemExit:
         print >>_former_stdout, "Remote console session disconnecting on a call to exit()"
         self.connection.close()
         self.connection = None

def show_sample(module):
    """Print sample modules."""

    methods_info = _extract_methods_info(module)
    methods_info = sorted(methods_info, key=lambda x: x['name'])
    methods_info = sorted(methods_info, key=lambda x: x['category'])

    grouped_catergories = itertools.groupby(
        methods_info, key=lambda x: x['category'])

    text = _TEMPLATE_PREFIX.format(module_doc=_bold(module.__doc__.upper()))
    nb_categories = len(set(
        method_info['category'] for method_info in methods_info))
    for current_category, (category_name, category_methods_info) in enumerate(
            grouped_catergories):

        methods_text = ''
        for method_info in category_methods_info:

            codelines_text = ''
            for line in method_info['codelines']:
                codelines_text += _CODELINE_TEMPLATE.format(codeline=line)

            methods_text += _METHOD_TEMPLATE.format(
                method_upper=_bold(method_info['name'].upper()),
                method=_bold(method_info['name']),
                doc=_bold(method_info['doc']),
                result=method_info['method'](),
                codelines=codelines_text.rstrip())

        text += _CATEGORY_TEMPLATE.format(
            step=_bold(_STEP_TEMPLATE.format(
                current_category=current_category+1,
                nb_categories=nb_categories)),
            category=_underline(category_name.upper()),
            methods=methods_text)

    pydoc.getpager()(text)

    def print_help(self, errors=None):
        buf = cStringIO.StringIO()
        sys.stdout = buf
        print '='*80

        optparse.OptionParser.print_help(self)
        print """
examples:    
 """
        if errors:
            print errors 

        sys.stdout = sys.__stdout__
        pager = pydoc.getpager()
        pager(buf.getvalue())

    def _show(self, message, log_level, *args):
        r"""
        Display ``message``.

        .. SEEALSO::

            :meth:`sage.dev.user_interface.UserInterface.show`

        TESTS::

            sage: from sage.dev.test.config import DoctestConfig
            sage: from sage.dev.cmd_line_interface import CmdLineInterface
            sage: UI = CmdLineInterface(DoctestConfig()["UI"])
            sage: UI.info("I ate {0} for dinner, a whole {1} for dessert, and then took a nice walk around the lake.", 'filet mignon', 'apple pie') # indirect doctest
            #  I ate filet mignon for dinner, a whole apple pie for dessert, and then took a
            #  nice walk around the lake.
        """
        if len(args) > 0:
            message = message.format(*args)
        height, width = self._get_dimensions()
        kwds = {'width': width}
        if log_level == INFO:
            kwds['initial_indent'] = kwds['subsequent_indent'] = '#  '

        wrap = textwrap.TextWrapper(**kwds).wrap
        message = list(itertools.chain.from_iterable(
            wrap(line) for line in message.splitlines()))

        if len(message) <= height:
            print(self._color_code(log_level) +
                  '\n'.join(message) +
                  self._color_code())
        else:
            message = '\n'.join(message)+'\n'
            try:
                self._pager(message)
            except AttributeError:
                import pydoc
                self._pager = pydoc.getpager()
                self._pager(message)

#.........这里部分代码省略.........

    Parameters
    ----------
    what : str
        String containing words to look for.
    module : str, module
        Module whose docstrings to go through.
    import_modules : bool
        Whether to import sub-modules in packages.
        Will import only modules in ``__all__``.
    regenerate : bool
        Whether to re-generate the docstring cache.

    Examples
    --------

    >>> np.lookfor('binary representation')
    Search results for 'binary representation'
    ------------------------------------------
    numpy.binary_repr
        Return the binary representation of the input number as a string.

    """
    import pydoc

    # Cache
    cache = _lookfor_generate_cache(module, import_modules, regenerate)

    # Search
    # XXX: maybe using a real stemming search engine would be better?
    found = []
    whats = str(what).lower().split()
    if not whats: return

    for name, (docstring, kind, index) in cache.iteritems():
        if kind in ('module', 'object'):
            # don't show modules or objects
            continue
        ok = True
        doc = docstring.lower()
        for w in whats:
            if w not in doc:
                ok = False
                break
        if ok:
            found.append(name)

    # Relevance sort
    # XXX: this is full Harrison-Stetson heuristics now,
    # XXX: it probably could be improved

    kind_relevance = {'func': 1000, 'class': 1000,
                      'module': -1000, 'object': -1000}

    def relevance(name, docstr, kind, index):
        r = 0
        # do the keywords occur within the start of the docstring?
        first_doc = "\n".join(docstr.lower().strip().split("\n")[:3])
        r += sum([200 for w in whats if w in first_doc])
        # do the keywords occur in the function name?
        r += sum([30 for w in whats if w in name])
        # is the full name long?
        r += -len(name) * 5
        # is the object of bad type?
        r += kind_relevance.get(kind, -1000)
        # is the object deep in namespace hierarchy?
        r += -name.count('.') * 10
        r += max(-index / 100, -100)
        return r

    def relevance_sort(a, b):
        dr = relevance(b, *cache[b]) - relevance(a, *cache[a])
        if dr != 0: return dr
        else: return cmp(a, b)
    found.sort(relevance_sort)

    # Pretty-print
    s = "Search results for '%s'" % (' '.join(whats))
    help_text = [s, "-"*len(s)]
    for name in found:
        doc, kind, ix = cache[name]

        doclines = [line.strip() for line in doc.strip().split("\n")
                    if line.strip()]

        # find a suitable short description
        try:
            first_doc = doclines[0].strip()
            if _function_signature_re.search(first_doc):
                first_doc = doclines[1].strip()
        except IndexError:
            first_doc = ""
        help_text.append("%s\n    %s" % (name, first_doc))

    # Output
    if len(help_text) > 10:
        pager = pydoc.getpager()
        pager("\n".join(help_text))
    else:
        print "\n".join(help_text)

#.........这里部分代码省略.........

    Notes
    -----
    Relevance is determined only roughly, by checking if the keywords occur
    in the function name, at the start of a docstring, etc.

    Examples
    --------
    >>> np.lookfor('binary representation')
    Search results for 'binary representation'
    ------------------------------------------
    numpy.binary_repr
        Return the binary representation of the input number as a string.
    numpy.core.setup_common.long_double_representation
        Given a binary dump as given by GNU od -b, look for long double
    numpy.base_repr
        Return a string representation of a number in the given base system.
    ...

    """
    import pydoc

    # Cache
    cache = _lookfor_generate_cache(module, import_modules, regenerate)

    # Search
    # XXX: maybe using a real stemming search engine would be better?
    found = []
    whats = str(what).lower().split()
    if not whats: return

    for name, (docstring, kind, index) in cache.iteritems():
        if kind in ('module', 'object'):
            # don't show modules or objects
            continue
        ok = True
        doc = docstring.lower()
        for w in whats:
            if w not in doc:
                ok = False
                break
        if ok:
            found.append(name)

    # Relevance sort
    # XXX: this is full Harrison-Stetson heuristics now,
    # XXX: it probably could be improved

    kind_relevance = {'func': 1000, 'class': 1000,
                      'module': -1000, 'object': -1000}

    def relevance(name, docstr, kind, index):
        r = 0
        # do the keywords occur within the start of the docstring?
        first_doc = "\n".join(docstr.lower().strip().split("\n")[:3])
        r += sum([200 for w in whats if w in first_doc])
        # do the keywords occur in the function name?
        r += sum([30 for w in whats if w in name])
        # is the full name long?
        r += -len(name) * 5
        # is the object of bad type?
        r += kind_relevance.get(kind, -1000)
        # is the object deep in namespace hierarchy?
        r += -name.count('.') * 10
        r += max(-index / 100, -100)
        return r

    def relevance_value(a):
        return relevance(a, *cache[a])
    found.sort(key=relevance_value)

    # Pretty-print
    s = "Search results for '%s'" % (' '.join(whats))
    help_text = [s, "-"*len(s)]
    for name in found[::-1]:
        doc, kind, ix = cache[name]

        doclines = [line.strip() for line in doc.strip().split("\n")
                    if line.strip()]

        # find a suitable short description
        try:
            first_doc = doclines[0].strip()
            if _function_signature_re.search(first_doc):
                first_doc = doclines[1].strip()
        except IndexError:
            first_doc = ""
        help_text.append("%s\n    %s" % (name, first_doc))

    if not found:
        help_text.append("Nothing found.")

    # Output
    if output is not None:
        output.write("\n".join(help_text))
    elif len(help_text) > 10:
        pager = pydoc.getpager()
        pager("\n".join(help_text))
    else:
        print "\n".join(help_text)

 def __init__(self):
     self.pager = pydoc.getpager()
     self.command_map = self.as_map()

import itertools
import sre_constants
import webbrowser
import subprocess
import traceback
from code import InteractiveConsole
from operator import itemgetter
from os.path import abspath, dirname, join

import logbook
from clint.textui import puts, indent, colored
from clint.textui.colored import red, green, cyan, magenta, yellow

logger = logbook.Logger('batshell')
HERE = dirname(abspath(__file__))
pager = pydoc.getpager()

try:
    subprocess.check_call("echo 'test' | xsel -pi", shell=True)
except subprocess.CalledProcessError:
    xsel_enabled = False
    logger.warning(u'✄ Proceeding without xsel ☹')
    logger.info('Please install xsel to automatically '
                'copy tested regexes to the clipboard.')
else:
    xsel_enabled = True
    logger.info(u'✄ xsel is enabled! ☺')


def command(*aliases, **kwargs):
    def decorator(f):

#.........这里部分代码省略.........
            String containing words to look for.

        module : str, module
            Module whose docstrings to go through.
        import_modules : bool
            Whether to import sub-modules in packages.
            Will import only modules in __all__
        regenerate: bool
            Re-generate the docstring cache

        """
        # Cache
        cache = {}

        for module in modules:
            try:
                c = self._lookfor_generate_cache(module, import_modules, regenerate)
                cache.update(c)
            except ImportError:
                pass

        # Search
        # XXX: maybe using a real stemming search engine would be better?
        found = []
        whats = str(what).lower().split()
        if not whats: return

        for name, (docstring, kind, index) in cache.items():
            if kind in ('module', 'object'):
                # don't show modules or objects
                continue
            ok = True
            doc = docstring.lower()
            for w in whats:
                if w not in doc:
                    ok = False
                    break
            if ok:
                found.append(name)

        # Relevance sort
        # XXX: this is full Harrison-Stetson heuristics now,
        # XXX: it probably could be improved

        kind_relevance = {'func': 1000, 'class': 1000,
                          'module': -1000, 'object': -1000}

        def relevance(name, docstr, kind, index):
            r = 0
            # do the keywords occur within the start of the docstring?
            first_doc = "\n".join(docstr.lower().strip().split("\n")[:3])
            r += sum([200 for w in whats if w in first_doc])
            # do the keywords occur in the function name?
            r += sum([30 for w in whats if w in name])
            # is the full name long?
            r += -len(name) * 5
            # is the object of bad type?
            r += kind_relevance.get(kind, -1000)
            # is the object deep in namespace hierarchy?
            r += -name.count('.') * 10
            r += max(-index / 100, -100)
            return r

        def relevance_sort(a, b):
            dr = relevance(b, *cache[b]) - relevance(a, *cache[a])
            if dr != 0: return dr
            else: return (a > b) - (a < b)

        # sort found according to relevance
        for i in range(len(found)):
            for j in range(i):
                if (relevance_sort(found[j],found[j+1]) > 0):
                    tmp = found[j]
                    found[j] = found[j+1]
                    found[j+1] = tmp

        # Pretty-print
        s = "Search results for '%s'" % (' '.join(whats))
        help_text = [s, "-"*len(s)]
        for name in found:
            doc, kind, ix = cache[name]

            doclines = [line.strip() for line in doc.strip().split("\n")
                        if line.strip()]

            # find a suitable short description
            try:
                first_doc = doclines[0].strip()
                if _function_signature_re.search(first_doc):
                    first_doc = doclines[1].strip()
            except IndexError:
                first_doc = ""
            help_text.append("%s\n    %s" % (name, first_doc))

        # Output
        if len(help_text) > 10:
            pager = pydoc.getpager()
            pager("\n".join(help_text))
        else:
            print("\n".join(help_text))