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+
+:mod:`bisect` --- Array bisection algorithm
+===========================================
+
+.. module:: bisect
+   :synopsis: Array bisection algorithms for binary searching.
+.. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
+.. example based on the PyModules FAQ entry by Aaron Watters <arw@pythonpros.com>
+
+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(list, item[, lo[, hi]])
+
+   Locate the proper insertion point for *item* in *list* 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 *item* is already
+   present in *list*, 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()``.  This assumes that *list* is already sorted.
+
+   .. versionadded:: 2.1
+
+
+.. function:: bisect_right(list, item[, lo[, hi]])
+
+   Similar to :func:`bisect_left`, but returns an insertion point which comes after
+   (to the right of) any existing entries of *item* in *list*.
+
+   .. versionadded:: 2.1
+
+
+.. function:: bisect(...)
+
+   Alias for :func:`bisect_right`.
+
+
+.. function:: insort_left(list, item[, lo[, hi]])
+
+   Insert *item* in *list* in sorted order.  This is equivalent to
+   ``list.insert(bisect.bisect_left(list, item, lo, hi), item)``.  This assumes
+   that *list* is already sorted.
+
+   .. versionadded:: 2.1
+
+
+.. function:: insort_right(list, item[, lo[, hi]])
+
+   Similar to :func:`insort_left`, but inserting *item* in *list* after any
+   existing entries of *item*.
+
+   .. versionadded:: 2.1
+
+
+.. function:: insort(...)
+
+   Alias for :func:`insort_right`.
+
+
+Examples
+--------
+
+.. _bisect-example:
+
+The :func:`bisect` function is generally useful for categorizing numeric data.
+This example uses :func:`bisect` to look up a letter grade for an exam total
+(say) based on a set of ordered numeric breakpoints: 85 and up is an 'A', 75..84
+is a 'B', etc.
+
+   >>> grades = "FEDCBA"
+   >>> breakpoints = [30, 44, 66, 75, 85]
+   >>> from bisect import bisect
+   >>> def grade(total):
+   ...           return grades[bisect(breakpoints, total)]
+   ...
+   >>> grade(66)
+   'C'
+   >>> map(grade, [33, 99, 77, 44, 12, 88])
+   ['E', 'A', 'B', 'D', 'F', 'A']
+
+