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Name	Size	Permission	Date
2to3.rst	16.15 KB	-rw-r--r--	2024-03-19 22:46
__future__.rst	6 KB	-rw-r--r--	2024-03-19 22:46
__main__.rst	12.34 KB	-rw-r--r--	2024-03-19 22:46
_thread.rst	7.88 KB	-rw-r--r--	2024-03-19 22:46
abc.rst	12.19 KB	-rw-r--r--	2024-03-19 22:46
aifc.rst	7.48 KB	-rw-r--r--	2024-03-19 22:46
allos.rst	678 B	-rw-r--r--	2024-03-19 22:46
archiving.rst	440 B	-rw-r--r--	2024-03-19 22:46
argparse.rst	80.31 KB	-rw-r--r--	2024-03-19 22:46
array.rst	10.45 KB	-rw-r--r--	2024-03-19 22:46
ast.rst	75.95 KB	-rw-r--r--	2024-03-19 22:46
asynchat.rst	8.44 KB	-rw-r--r--	2024-03-19 22:46
asyncio-api-index.rst	4.61 KB	-rw-r--r--	2024-03-19 22:46
asyncio-dev.rst	7.31 KB	-rw-r--r--	2024-03-19 22:46
asyncio-eventloop.rst	59.33 KB	-rw-r--r--	2024-03-19 22:46
asyncio-exceptions.rst	1.7 KB	-rw-r--r--	2024-03-19 22:46
asyncio-future.rst	8.31 KB	-rw-r--r--	2024-03-19 22:46
asyncio-llapi-index.rst	14.06 KB	-rw-r--r--	2024-03-19 22:46
asyncio-platforms.rst	3.03 KB	-rw-r--r--	2024-03-19 22:46
asyncio-policy.rst	9.17 KB	-rw-r--r--	2024-03-19 22:46
asyncio-protocol.rst	31.55 KB	-rw-r--r--	2024-03-19 22:46
asyncio-queue.rst	5.5 KB	-rw-r--r--	2024-03-19 22:46
asyncio-stream.rst	14.88 KB	-rw-r--r--	2024-03-19 22:46
asyncio-subprocess.rst	11.4 KB	-rw-r--r--	2024-03-19 22:46
asyncio-sync.rst	8.84 KB	-rw-r--r--	2024-03-19 22:46
asyncio-task.rst	32.29 KB	-rw-r--r--	2024-03-19 22:46
asyncio.rst	2.63 KB	-rw-r--r--	2024-03-19 22:46
asyncore.rst	13.43 KB	-rw-r--r--	2024-03-19 22:46
atexit.rst	3.84 KB	-rw-r--r--	2024-03-19 22:46
audioop.rst	10.59 KB	-rw-r--r--	2024-03-19 22:46
audit_events.rst	2.29 KB	-rw-r--r--	2024-03-19 22:46
base64.rst	10.87 KB	-rw-r--r--	2024-03-19 22:46
bdb.rst	14.54 KB	-rw-r--r--	2024-03-19 22:46
binary.rst	654 B	-rw-r--r--	2024-03-19 22:46
binascii.rst	7.66 KB	-rw-r--r--	2024-03-19 22:46
binhex.rst	1.69 KB	-rw-r--r--	2024-03-19 22:46
bisect.rst	9.06 KB	-rw-r--r--	2024-03-19 22:46
builtins.rst	1.43 KB	-rw-r--r--	2024-03-19 22:46
bz2.rst	11.87 KB	-rw-r--r--	2024-03-19 22:46
calendar.rst	14.17 KB	-rw-r--r--	2024-03-19 22:46
cgi.rst	21.49 KB	-rw-r--r--	2024-03-19 22:46
cgitb.rst	3.75 KB	-rw-r--r--	2024-03-19 22:46
chunk.rst	5.1 KB	-rw-r--r--	2024-03-19 22:46
cmath.rst	9.42 KB	-rw-r--r--	2024-03-19 22:46
cmd.rst	13.6 KB	-rw-r--r--	2024-03-19 22:46
code.rst	7.64 KB	-rw-r--r--	2024-03-19 22:46
codecs.rst	75.37 KB	-rw-r--r--	2024-03-19 22:46
codeop.rst	3 KB	-rw-r--r--	2024-03-19 22:46
collections.abc.rst	16.73 KB	-rw-r--r--	2024-03-19 22:46
collections.rst	52.13 KB	-rw-r--r--	2024-03-19 22:46
colorsys.rst	1.77 KB	-rw-r--r--	2024-03-19 22:46
compileall.rst	13.45 KB	-rw-r--r--	2024-03-19 22:46
concurrency.rst	685 B	-rw-r--r--	2024-03-19 22:46
concurrent.futures.rst	20.76 KB	-rw-r--r--	2024-03-19 22:46
concurrent.rst	171 B	-rw-r--r--	2024-03-19 22:46
configparser.rst	49.91 KB	-rw-r--r--	2024-03-19 22:46
constants.rst	3.77 KB	-rw-r--r--	2024-03-19 22:46
contextlib.rst	34.35 KB	-rw-r--r--	2024-03-19 22:46
contextvars.rst	8.32 KB	-rw-r--r--	2024-03-19 22:46
copy.rst	3.39 KB	-rw-r--r--	2024-03-19 22:46
copyreg.rst	1.97 KB	-rw-r--r--	2024-03-19 22:46
crypt.rst	5.84 KB	-rw-r--r--	2024-03-19 22:46
crypto.rst	411 B	-rw-r--r--	2024-03-19 22:46
csv.rst	20.91 KB	-rw-r--r--	2024-03-19 22:46
ctypes.rst	90.63 KB	-rw-r--r--	2024-03-19 22:46
curses.ascii.rst	8.85 KB	-rw-r--r--	2024-03-19 22:46
curses.panel.rst	2.7 KB	-rw-r--r--	2024-03-19 22:46
curses.rst	77.03 KB	-rw-r--r--	2024-03-19 22:46
custominterp.rst	569 B	-rw-r--r--	2024-03-19 22:46
dataclasses.rst	29.22 KB	-rw-r--r--	2024-03-19 22:46
datatypes.rst	817 B	-rw-r--r--	2024-03-19 22:46
datetime.rst	101.93 KB	-rw-r--r--	2024-03-19 22:46
dbm.rst	15.05 KB	-rw-r--r--	2024-03-19 22:46
debug.rst	611 B	-rw-r--r--	2024-03-19 22:46
decimal.rst	76.21 KB	-rw-r--r--	2024-03-19 22:46
development.rst	719 B	-rw-r--r--	2024-03-19 22:46
devmode.rst	7.28 KB	-rw-r--r--	2024-03-19 22:46
dialog.rst	6.12 KB	-rw-r--r--	2024-03-19 22:46
difflib.rst	29.76 KB	-rw-r--r--	2024-03-19 22:46
dis.rst	35.33 KB	-rw-r--r--	2024-03-19 22:46
distribution.rst	452 B	-rw-r--r--	2024-03-19 22:46
distutils.rst	2.09 KB	-rw-r--r--	2024-03-19 22:46
doctest.rst	69.87 KB	-rw-r--r--	2024-03-19 22:46
email.charset.rst	7.83 KB	-rw-r--r--	2024-03-19 22:46
email.compat32-message.rst	32.89 KB	-rw-r--r--	2024-03-19 22:46
email.contentmanager.rst	8.9 KB	-rw-r--r--	2024-03-19 22:46
email.encoders.rst	2.92 KB	-rw-r--r--	2024-03-19 22:46
email.errors.rst	4.8 KB	-rw-r--r--	2024-03-19 22:46
email.examples.rst	1.87 KB	-rw-r--r--	2024-03-19 22:46
email.generator.rst	13.49 KB	-rw-r--r--	2024-03-19 22:46
email.header.rst	8.97 KB	-rw-r--r--	2024-03-19 22:46
email.headerregistry.rst	18.04 KB	-rw-r--r--	2024-03-19 22:46
email.iterators.rst	2.73 KB	-rw-r--r--	2024-03-19 22:46
email.message.rst	32.25 KB	-rw-r--r--	2024-03-19 22:46
email.mime.rst	11.45 KB	-rw-r--r--	2024-03-19 22:46
email.parser.rst	13.76 KB	-rw-r--r--	2024-03-19 22:46
email.policy.rst	26.39 KB	-rw-r--r--	2024-03-19 22:46
email.rst	6.63 KB	-rw-r--r--	2024-03-19 22:46
email.utils.rst	9.17 KB	-rw-r--r--	2024-03-19 22:46
ensurepip.rst	4.9 KB	-rw-r--r--	2024-03-19 22:46
enum.rst	35.96 KB	-rw-r--r--	2024-03-19 22:46
errno.rst	7.81 KB	-rw-r--r--	2024-03-19 22:46
exceptions.rst	29.86 KB	-rw-r--r--	2024-03-19 22:46
faulthandler.rst	6.51 KB	-rw-r--r--	2024-03-19 22:46
fcntl.rst	7.99 KB	-rw-r--r--	2024-03-19 22:46
filecmp.rst	5.89 KB	-rw-r--r--	2024-03-19 22:46
fileformats.rst	273 B	-rw-r--r--	2024-03-19 22:46
fileinput.rst	8.99 KB	-rw-r--r--	2024-03-19 22:46
filesys.rst	946 B	-rw-r--r--	2024-03-19 22:46
fnmatch.rst	3.31 KB	-rw-r--r--	2024-03-19 22:46
fractions.rst	6.2 KB	-rw-r--r--	2024-03-19 22:46
frameworks.rst	391 B	-rw-r--r--	2024-03-19 22:46
ftplib.rst	18.13 KB	-rw-r--r--	2024-03-19 22:46
functional.rst	365 B	-rw-r--r--	2024-03-19 22:46
functions.rst	84.5 KB	-rw-r--r--	2024-03-19 22:46
functools.rst	25.99 KB	-rw-r--r--	2024-03-19 22:46
gc.rst	11.16 KB	-rw-r--r--	2024-03-19 22:46
getopt.rst	6.4 KB	-rw-r--r--	2024-03-19 22:46
getpass.rst	1.84 KB	-rw-r--r--	2024-03-19 22:46
gettext.rst	27.35 KB	-rw-r--r--	2024-03-19 22:46
glob.rst	5.07 KB	-rw-r--r--	2024-03-19 22:46
graphlib.rst	8.56 KB	-rw-r--r--	2024-03-19 22:46
grp.rst	2.32 KB	-rw-r--r--	2024-03-19 22:46
gzip.rst	9.7 KB	-rw-r--r--	2024-03-19 22:46
hashlib-blake2-tree.png	10.81 KB	-rw-r--r--	2024-03-19 22:46
hashlib.rst	27.32 KB	-rw-r--r--	2024-03-19 22:46
heapq.rst	13.59 KB	-rw-r--r--	2024-03-19 22:46
hmac.rst	4.93 KB	-rw-r--r--	2024-03-19 22:46
html.entities.rst	1.31 KB	-rw-r--r--	2024-03-19 22:46
html.parser.rst	11.02 KB	-rw-r--r--	2024-03-19 22:46
html.rst	1.27 KB	-rw-r--r--	2024-03-19 22:46
http.client.rst	20.86 KB	-rw-r--r--	2024-03-19 22:46
http.cookiejar.rst	27.68 KB	-rw-r--r--	2024-03-19 22:46
http.cookies.rst	8.79 KB	-rw-r--r--	2024-03-19 22:46
http.rst	7.61 KB	-rw-r--r--	2024-03-19 22:46
http.server.rst	19.68 KB	-rw-r--r--	2024-03-19 22:46
i18n.rst	408 B	-rw-r--r--	2024-03-19 22:46
idle.rst	38.83 KB	-rw-r--r--	2024-03-19 22:46
imaplib.rst	21.42 KB	-rw-r--r--	2024-03-19 22:46
imghdr.rst	3.01 KB	-rw-r--r--	2024-03-19 22:46
imp.rst	15.15 KB	-rw-r--r--	2024-03-19 22:46
importlib.metadata.rst	12.12 KB	-rw-r--r--	2024-03-19 22:46
importlib.rst	66.95 KB	-rw-r--r--	2024-03-19 22:46
index.rst	2.37 KB	-rw-r--r--	2024-03-19 22:46
inspect.rst	59.36 KB	-rw-r--r--	2024-03-19 22:46
internet.rst	923 B	-rw-r--r--	2024-03-19 22:46
intro.rst	2.95 KB	-rw-r--r--	2024-03-19 22:46
io.rst	44.14 KB	-rw-r--r--	2024-03-19 22:46
ipaddress.rst	35.22 KB	-rw-r--r--	2024-03-19 22:46
ipc.rst	643 B	-rw-r--r--	2024-03-19 22:46
itertools.rst	42.1 KB	-rw-r--r--	2024-03-19 22:46
json.rst	28.07 KB	-rw-r--r--	2024-03-19 22:46
keyword.rst	1.12 KB	-rw-r--r--	2024-03-19 22:46
language.rst	494 B	-rw-r--r--	2024-03-19 22:46
linecache.rst	2.49 KB	-rw-r--r--	2024-03-19 22:46
locale.rst	26.03 KB	-rw-r--r--	2024-03-19 22:46
logging.config.rst	36.69 KB	-rw-r--r--	2024-03-19 22:46
logging.handlers.rst	47.53 KB	-rw-r--r--	2024-03-19 22:46
logging.rst	66.77 KB	-rw-r--r--	2024-03-19 22:46
lzma.rst	16.95 KB	-rw-r--r--	2024-03-19 22:46
mailbox.rst	61.47 KB	-rw-r--r--	2024-03-19 22:46
mailcap.rst	4.43 KB	-rw-r--r--	2024-03-19 22:46
markup.rst	679 B	-rw-r--r--	2024-03-19 22:46
marshal.rst	5.35 KB	-rw-r--r--	2024-03-19 22:46
math.rst	21.01 KB	-rw-r--r--	2024-03-19 22:46
mimetypes.rst	9.96 KB	-rw-r--r--	2024-03-19 22:46
mm.rst	331 B	-rw-r--r--	2024-03-19 22:46
mmap.rst	13.41 KB	-rw-r--r--	2024-03-19 22:46
modulefinder.rst	3.16 KB	-rw-r--r--	2024-03-19 22:46
modules.rst	381 B	-rw-r--r--	2024-03-19 22:46
msilib.rst	18.51 KB	-rw-r--r--	2024-03-19 22:46
msvcrt.rst	4.5 KB	-rw-r--r--	2024-03-19 22:46
multiprocessing.rst	108.08 KB	-rw-r--r--	2024-03-19 22:46
multiprocessing.shared_memory.rst	14.44 KB	-rw-r--r--	2024-03-19 22:46
netdata.rst	314 B	-rw-r--r--	2024-03-19 22:46
netrc.rst	3.32 KB	-rw-r--r--	2024-03-19 22:46
nis.rst	2.07 KB	-rw-r--r--	2024-03-19 22:46
nntplib.rst	21.25 KB	-rw-r--r--	2024-03-19 22:46
numbers.rst	8.09 KB	-rw-r--r--	2024-03-19 22:46
numeric.rst	696 B	-rw-r--r--	2024-03-19 22:46
operator.rst	18.84 KB	-rw-r--r--	2024-03-19 22:46
optparse.rst	75.3 KB	-rw-r--r--	2024-03-19 22:46
os.path.rst	17.4 KB	-rw-r--r--	2024-03-19 22:46
os.rst	168.21 KB	-rw-r--r--	2024-03-19 22:46
ossaudiodev.rst	17.56 KB	-rw-r--r--	2024-03-19 22:46
pathlib-inheritance.png	6.28 KB	-rw-r--r--	2024-03-19 22:46
pathlib-inheritance.svg	55.23 KB	-rw-r--r--	2024-03-19 22:46
pathlib.rst	39.66 KB	-rw-r--r--	2024-03-19 22:46
pdb.rst	20.26 KB	-rw-r--r--	2024-03-19 22:46
persistence.rst	591 B	-rw-r--r--	2024-03-19 22:46
pickle.rst	46.52 KB	-rw-r--r--	2024-03-19 22:46
pickletools.rst	3.64 KB	-rw-r--r--	2024-03-19 22:46
pipes.rst	2.72 KB	-rw-r--r--	2024-03-19 22:46
pkgutil.rst	10.26 KB	-rw-r--r--	2024-03-19 22:46
platform.rst	9.7 KB	-rw-r--r--	2024-03-19 22:46
plistlib.rst	5.32 KB	-rw-r--r--	2024-03-19 22:46
poplib.rst	8.98 KB	-rw-r--r--	2024-03-19 22:46
posix.rst	3.52 KB	-rw-r--r--	2024-03-19 22:46
pprint.rst	16.34 KB	-rw-r--r--	2024-03-19 22:46
profile.rst	29.55 KB	-rw-r--r--	2024-03-19 22:46
pty.rst	4.5 KB	-rw-r--r--	2024-03-19 22:46
pwd.rst	2.67 KB	-rw-r--r--	2024-03-19 22:46
py_compile.rst	6.52 KB	-rw-r--r--	2024-03-19 22:46
pyclbr.rst	4.45 KB	-rw-r--r--	2024-03-19 22:46
pydoc.rst	5.01 KB	-rw-r--r--	2024-03-19 22:46
pyexpat.rst	29.52 KB	-rw-r--r--	2024-03-19 22:46
python.rst	480 B	-rw-r--r--	2024-03-19 22:46
queue.rst	10 KB	-rw-r--r--	2024-03-19 22:46
quopri.rst	2.51 KB	-rw-r--r--	2024-03-19 22:46
random.rst	22.98 KB	-rw-r--r--	2024-03-19 22:46
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readline.rst	12.13 KB	-rw-r--r--	2024-03-19 22:46
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resource.rst	13 KB	-rw-r--r--	2024-03-19 22:46
rlcompleter.rst	2.24 KB	-rw-r--r--	2024-03-19 22:46
runpy.rst	8.09 KB	-rw-r--r--	2024-03-19 22:46
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security_warnings.rst	1.56 KB	-rw-r--r--	2024-03-19 22:46
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signal.rst	25.12 KB	-rw-r--r--	2024-03-19 22:46
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sqlite3.rst	66.94 KB	-rw-r--r--	2024-03-19 22:46
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stringprep.rst	4.18 KB	-rw-r--r--	2024-03-19 22:46
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subprocess.rst	57.99 KB	-rw-r--r--	2024-03-19 22:46
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telnetlib.rst	8.03 KB	-rw-r--r--	2024-03-19 22:46
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termios.rst	3.66 KB	-rw-r--r--	2024-03-19 22:46
test.rst	54.87 KB	-rw-r--r--	2024-03-19 22:46
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threading.rst	42.74 KB	-rw-r--r--	2024-03-19 22:46
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Rename

:mod:`bisect` --- Array bisection algorithm
===========================================

.. module:: bisect
   :synopsis: Array bisection algorithms for binary searching.
.. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
.. sectionauthor:: Raymond Hettinger <python at rcn.com>
.. example based on the PyModules FAQ entry by Aaron Watters <arw@pythonpros.com>

**Source code:** :source:`Lib/bisect.py`

--------------

This module provides support for maintaining a list in sorted order without
having to sort the list after each insertion.  For long lists of items with
expensive comparison operations, this can be an improvement over the more common
approach.  The module is called :mod:`bisect` because it uses a basic bisection
algorithm to do its work.  The source code may be most useful as a working
example of the algorithm (the boundary conditions are already right!).

The following functions are provided:

.. function:: bisect_left(a, x, lo=0, hi=len(a), *, key=None)

Locate the insertion point for *x* in *a* to maintain sorted order.
   The parameters *lo* and *hi* may be used to specify a subset of the list
   which should be considered; by default the entire list is used.  If *x* is
   already present in *a*, the insertion point will be before (to the left of)
   any existing entries.  The return value is suitable for use as the first
   parameter to ``list.insert()`` assuming that *a* is already sorted.

The returned insertion point *i* partitions the array *a* into two halves so
   that ``all(val < x for val in a[lo : i])`` for the left side and
   ``all(val >= x for val in a[i : hi])`` for the right side.

*key* specifies a :term:`key function` of one argument that is used to
   extract a comparison key from each element in the array.  To support
   searching complex records, the key function is not applied to the *x* value.

If *key* is ``None``, the elements are compared directly with no
   intervening function call.

.. versionchanged:: 3.10
      Added the *key* parameter.

.. function:: bisect_right(a, x, lo=0, hi=len(a), *, key=None)
              bisect(a, x, lo=0, hi=len(a), *, key=None)

Similar to :func:`bisect_left`, but returns an insertion point which comes
   after (to the right of) any existing entries of *x* in *a*.

The returned insertion point *i* partitions the array *a* into two halves so
   that ``all(val <= x for val in a[lo : i])`` for the left side and
   ``all(val > x for val in a[i : hi])`` for the right side.

If *key* is ``None``, the elements are compared directly with no
   intervening function call.

.. versionchanged:: 3.10
      Added the *key* parameter.

.. function:: insort_left(a, x, lo=0, hi=len(a), *, key=None)

Insert *x* in *a* in sorted order.

This function first runs :func:`bisect_left` to locate an insertion point.
   Next, it runs the :meth:`insert` method on *a* to insert *x* at the
   appropriate position to maintain sort order.

To support inserting records in a table, the *key* function (if any) is
   applied to *x* for the search step but not for the insertion step.

Keep in mind that the ``O(log n)`` search is dominated by the slow O(n)
   insertion step.

.. versionchanged:: 3.10
      Added the *key* parameter.

.. function:: insort_right(a, x, lo=0, hi=len(a), *, key=None)
              insort(a, x, lo=0, hi=len(a), *, key=None)

Similar to :func:`insort_left`, but inserting *x* in *a* after any existing
   entries of *x*.

This function first runs :func:`bisect_right` to locate an insertion point.
   Next, it runs the :meth:`insert` method on *a* to insert *x* at the
   appropriate position to maintain sort order.

To support inserting records in a table, the *key* function (if any) is
   applied to *x* for the search step but not for the insertion step.

Keep in mind that the ``O(log n)`` search is dominated by the slow O(n)
   insertion step.

.. versionchanged:: 3.10
      Added the *key* parameter.

Performance Notes
-----------------

When writing time sensitive code using *bisect()* and *insort()*, keep these
thoughts in mind:

* Bisection is effective for searching ranges of values.
  For locating specific values, dictionaries are more performant.

* The *insort()* functions are ``O(n)`` because the logarithmic search step
  is dominated by the linear time insertion step.

* The search functions are stateless and discard key function results after
  they are used.  Consequently, if the search functions are used in a loop,
  the key function may be called again and again on the same array elements.
  If the key function isn't fast, consider wrapping it with
  :func:`functools.cache` to avoid duplicate computations.  Alternatively,
  consider searching an array of precomputed keys to locate the insertion
  point (as shown in the examples section below).

.. seealso::

* `Sorted Collections
     <https://grantjenks.com/docs/sortedcollections/>`_ is a high performance
     module that uses *bisect* to managed sorted collections of data.

* The `SortedCollection recipe
     <https://code.activestate.com/recipes/577197-sortedcollection/>`_ uses
     bisect to build a full-featured collection class with straight-forward search
     methods and support for a key-function.  The keys are precomputed to save
     unnecessary calls to the key function during searches.

Searching Sorted Lists
----------------------

The above :func:`bisect` functions are useful for finding insertion points but
can be tricky or awkward to use for common searching tasks. The following five
functions show how to transform them into the standard lookups for sorted
lists::

def index(a, x):
        'Locate the leftmost value exactly equal to x'
        i = bisect_left(a, x)
        if i != len(a) and a[i] == x:
            return i
        raise ValueError

def find_lt(a, x):
        'Find rightmost value less than x'
        i = bisect_left(a, x)
        if i:
            return a[i-1]
        raise ValueError

def find_le(a, x):
        'Find rightmost value less than or equal to x'
        i = bisect_right(a, x)
        if i:
            return a[i-1]
        raise ValueError

def find_gt(a, x):
        'Find leftmost value greater than x'
        i = bisect_right(a, x)
        if i != len(a):
            return a[i]
        raise ValueError

def find_ge(a, x):
        'Find leftmost item greater than or equal to x'
        i = bisect_left(a, x)
        if i != len(a):
            return a[i]
        raise ValueError

Examples
--------

.. _bisect-example:

The :func:`bisect` function can be useful for numeric table lookups. This
example uses :func:`bisect` to look up a letter grade for an exam score (say)
based on a set of ordered numeric breakpoints: 90 and up is an 'A', 80 to 89 is
a 'B', and so on::

>>> def grade(score, breakpoints=[60, 70, 80, 90], grades='FDCBA'):
   ...     i = bisect(breakpoints, score)
   ...     return grades[i]
   ...
   >>> [grade(score) for score in [33, 99, 77, 70, 89, 90, 100]]
   ['F', 'A', 'C', 'C', 'B', 'A', 'A']

The :func:`bisect` and :func:`insort` functions also work with lists of
tuples.  The *key* argument can serve to extract the field used for ordering
records in a table::

>>> from collections import namedtuple
    >>> from operator import attrgetter
    >>> from bisect import bisect, insort
    >>> from pprint import pprint

>>> Movie = namedtuple('Movie', ('name', 'released', 'director'))

>>> movies = [
    ...     Movie('Jaws', 1975, 'Speilberg'),
    ...     Movie('Titanic', 1997, 'Cameron'),
    ...     Movie('The Birds', 1963, 'Hitchcock'),
    ...     Movie('Aliens', 1986, 'Scott')
    ... ]

>>> # Find the first movie released after 1960
    >>> by_year = attrgetter('released')
    >>> movies.sort(key=by_year)
    >>> movies[bisect(movies, 1960, key=by_year)]
    Movie(name='The Birds', released=1963, director='Hitchcock')

>>> # Insert a movie while maintaining sort order
    >>> romance = Movie('Love Story', 1970, 'Hiller')
    >>> insort(movies, romance, key=by_year)
    >>> pprint(movies)
    [Movie(name='The Birds', released=1963, director='Hitchcock'),
     Movie(name='Love Story', released=1970, director='Hiller'),
     Movie(name='Jaws', released=1975, director='Speilberg'),
     Movie(name='Aliens', released=1986, director='Scott'),
     Movie(name='Titanic', released=1997, director='Cameron')]

If the key function is expensive, it is possible to avoid repeated function
calls by searching a list of precomputed keys to find the index of a record::

>>> data = [('red', 5), ('blue', 1), ('yellow', 8), ('black', 0)]
    >>> data.sort(key=lambda r: r[1])       # Or use operator.itemgetter(1).
    >>> keys = [r[1] for r in data]         # Precompute a list of keys.
    >>> data[bisect_left(keys, 0)]
    ('black', 0)
    >>> data[bisect_left(keys, 1)]
    ('blue', 1)
    >>> data[bisect_left(keys, 5)]
    ('red', 5)
    >>> data[bisect_left(keys, 8)]
    ('yellow', 8)