5 files changed, 700 insertions, 0 deletions
diff --git a/libbe/util/beuuid.py b/libbe/util/beuuid.py
new file mode 100644
index 0000000..a3a3b6c
--- /dev/null
+++ b/libbe/util/beuuid.py
@@ -0,0 +1,67 @@
+# Copyright (C) 2008-2009 Gianluca Montecchi <gian@grys.it>
+#                         W. Trevor King <wking@drexel.edu>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+"""
+Backwards compatibility support for Python 2.4.  Once people give up
+on 2.4 ;), the uuid call should be merged into bugdir.py
+"""
+
+import libbe
+if libbe.TESTING == True:
+    import unittest
+
+
+try:
+    from uuid import uuid4 # Python >= 2.5
+    def uuid_gen():
+        id = uuid4()
+        idstr = id.urn
+        start = "urn:uuid:"
+        assert idstr.startswith(start)
+        return idstr[len(start):]
+except ImportError:
+    import os
+    import sys
+    from subprocess import Popen, PIPE
+
+    def uuid_gen():
+        # Shell-out to system uuidgen
+        args = ['uuidgen', 'r']
+        try:
+            if sys.platform != "win32":
+                q = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE)
+            else:
+                # win32 don't have os.execvp() so have to run command in a shell
+                q = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE, 
+                          shell=True, cwd=cwd)
+        except OSError, e :
+            strerror = "%s\nwhile executing %s" % (e.args[1], args)
+            raise OSError, strerror
+        output, error = q.communicate()
+        status = q.wait()
+        if status != 0:
+            strerror = "%s\nwhile executing %s" % (status, args)
+            raise Exception, strerror
+        return output.rstrip('\n')
+
+if libbe.TESTING == True:
+    class UUIDtestCase(unittest.TestCase):
+        def testUUID_gen(self):
+            id = uuid_gen()
+            self.failUnless(len(id) == 36, "invalid UUID '%s'" % id)
+
+    suite = unittest.TestLoader().loadTestsFromTestCase(UUIDtestCase)
diff --git a/libbe/util/encoding.py b/libbe/util/encoding.py
new file mode 100644
index 0000000..d09117f
--- /dev/null
+++ b/libbe/util/encoding.py
@@ -0,0 +1,66 @@
+# Bugs Everywhere, a distributed bugtracker
+# Copyright (C) 2008-2009 Gianluca Montecchi <gian@grys.it>
+#                         W. Trevor King <wking@drexel.edu>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+"""
+Support input/output/filesystem encodings (e.g. UTF-8).
+"""
+
+import codecs
+import locale
+import sys
+
+import libbe
+if libbe.TESTING == True:
+    import doctest
+
+
+ENCODING = None # override get_encoding() output by setting this
+
+def get_encoding():
+    """
+    Guess a useful input/output/filesystem encoding...  Maybe we need
+    seperate encodings for input/output and filesystem?  Hmm...
+    """
+    if ENCODING != None:
+        return ENCODING
+    encoding = locale.getpreferredencoding() or sys.getdefaultencoding()
+    if sys.platform != 'win32' or sys.version_info[:2] > (2, 3):
+        encoding = locale.getlocale(locale.LC_TIME)[1] or encoding
+        # Python 2.3 on windows doesn't know about 'XYZ' alias for 'cpXYZ'
+    return encoding
+
+def known_encoding(encoding):
+    """
+    >>> known_encoding("highly-unlikely-encoding")
+    False
+    >>> known_encoding(get_encoding())
+    True
+    """
+    try:
+        codecs.lookup(encoding)
+        return True
+    except LookupError:
+        return False
+
+def set_IO_stream_encodings(encoding):
+    sys.stdin = codecs.getreader(encoding)(sys.__stdin__)
+    sys.stdout = codecs.getwriter(encoding)(sys.__stdout__)
+    sys.stderr = codecs.getwriter(encoding)(sys.__stderr__)
+
+if libbe.TESTING == True:
+    suite = doctest.DocTestSuite()
diff --git a/libbe/util/subproc.py b/libbe/util/subproc.py
new file mode 100644
index 0000000..8806e26
--- /dev/null
+++ b/libbe/util/subproc.py
@@ -0,0 +1,223 @@
+# Copyright (C) 2009 W. Trevor King <wking@drexel.edu>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+"""
+Functions for running external commands in subprocesses.
+"""
+
+from subprocess import Popen, PIPE
+import sys
+
+import libbe
+from encoding import get_encoding
+if libbe.TESTING == True:
+    import doctest
+
+_MSWINDOWS = sys.platform == 'win32'
+_POSIX = not _MSWINDOWS
+
+if _POSIX == True:
+    import os
+    import select
+
+class CommandError(Exception):
+    def __init__(self, command, status, stdout=None, stderr=None):
+        strerror = ['Command failed (%d):\n  %s\n' % (status, stderr),
+                    'while executing\n  %s' % command]
+        Exception.__init__(self, '\n'.join(strerror))
+        self.command = command
+        self.status = status
+        self.stdout = stdout
+        self.stderr = stderr
+
+def invoke(args, stdin=None, stdout=PIPE, stderr=PIPE, expect=(0,),
+           cwd=None, unicode_output=True, verbose=False, encoding=None):
+    """
+    expect should be a tuple of allowed exit codes.  cwd should be
+    the directory from which the command will be executed.  When
+    unicode_output == True, convert stdout and stdin strings to
+    unicode before returing them.
+    """
+    if cwd == None:
+        cwd = '.'
+    if verbose == True:
+        print >> sys.stderr, '%s$ %s' % (cwd, ' '.join(args))
+    try :
+        if _POSIX:
+            q = Popen(args, stdin=PIPE, stdout=stdout, stderr=stderr, cwd=cwd)
+        else:
+            assert _MSWINDOWS==True, 'invalid platform'
+            # win32 don't have os.execvp() so have to run command in a shell
+            q = Popen(args, stdin=PIPE, stdout=stdout, stderr=stderr, 
+                      shell=True, cwd=cwd)
+    except OSError, e:
+        raise CommandError(args, status=e.args[0], stderr=e)
+    stdout,stderr = q.communicate(input=stdin)
+    status = q.wait()
+    if unicode_output == True:
+        if encoding == None:
+            encoding = get_encoding()
+        if stdout != None:
+            stdout = unicode(stdout, encoding)
+        if stderr != None:
+            stderr = unicode(stderr, encoding)
+    if verbose == True:
+        print >> sys.stderr, '%d\n%s%s' % (status, stdout, stderr)
+    if status not in expect:
+        raise CommandError(args, status, stdout, stderr)
+    return status, stdout, stderr
+
+class Pipe (object):
+    """
+    Simple interface for executing POSIX-style pipes based on the
+    subprocess module.  The only complication is the adaptation of
+    subprocess.Popen._comminucate to listen to the stderrs of all
+    processes involved in the pipe, as well as the terminal process'
+    stdout.  There are two implementations of Pipe._communicate, one
+    for MS Windows, and one for POSIX systems.  The MS Windows
+    implementation is currently untested.
+
+    >>> p = Pipe([['find', '/etc/'], ['grep', '^/etc/ssh$']])
+    >>> p.stdout
+    '/etc/ssh\\n'
+    >>> p.status
+    1
+    >>> p.statuses
+    [1, 0]
+    >>> p.stderrs # doctest: +ELLIPSIS
+    [...find: ...: Permission denied..., '']
+    """
+    def __init__(self, cmds, stdin=None):
+        # spawn processes
+        self._procs = []
+        for cmd in cmds:
+            if len(self._procs) != 0:
+                stdin = self._procs[-1].stdout
+            self._procs.append(Popen(cmd, stdin=stdin, stdout=PIPE, stderr=PIPE))
+
+        self.stdout,self.stderrs = self._communicate(input=None)
+
+        # collect process statuses
+        self.statuses = []
+        self.status = 0
+        for proc in self._procs:
+            self.statuses.append(proc.wait())
+            if self.statuses[-1] != 0:
+                self.status = self.statuses[-1]
+
+    # Code excerpted from subprocess.Popen._communicate()
+    if _MSWINDOWS == True:
+        def _communicate(self, input=None):
+            assert input == None, 'stdin != None not yet supported'
+            # listen to each process' stderr
+            threads = []
+            std_X_arrays = []
+            for proc in self._procs:
+                stderr_array = []
+                thread = Thread(target=proc._readerthread,
+                                args=(proc.stderr, stderr_array))
+                thread.setDaemon(True)
+                thread.start()
+                threads.append(thread)
+                std_X_arrays.append(stderr_array)
+    
+            # also listen to the last processes stdout
+            stdout_array = []
+            thread = Thread(target=proc._readerthread,
+                            args=(proc.stdout, stdout_array))
+            thread.setDaemon(True)
+            thread.start()
+            threads.append(thread)
+            std_X_arrays.append(stdout_array)
+    
+            # join threads as they die
+            for thread in threads:
+                thread.join()
+    
+            # read output from reader threads
+            std_X_strings = []
+            for std_X_array in std_X_arrays:
+                std_X_strings.append(std_X_array[0])
+
+            stdout = std_X_strings.pop(-1)
+            stderrs = std_X_strings
+            return (stdout, stderrs)
+    else:
+        assert _POSIX==True, 'invalid platform'
+        def _communicate(self, input=None):
+            read_set = []
+            write_set = []
+            read_arrays = []
+            stdout = None # Return
+            stderr = None # Return
+
+            if self._procs[0].stdin:
+                # Flush stdio buffer.  This might block, if the user has
+                # been writing to .stdin in an uncontrolled fashion.
+                self._procs[0].stdin.flush()
+                if input:
+                    write_set.append(self._procs[0].stdin)
+                else:
+                    self._procs[0].stdin.close()
+            for proc in self._procs:
+                read_set.append(proc.stderr)
+                read_arrays.append([])
+            read_set.append(self._procs[-1].stdout)
+            read_arrays.append([])
+
+            input_offset = 0
+            while read_set or write_set:
+                try:
+                    rlist, wlist, xlist = select.select(read_set, write_set, [])
+                except select.error, e:
+                    if e.args[0] == errno.EINTR:
+                        continue
+                    raise
+                if self._procs[0].stdin in wlist:
+                    # When select has indicated that the file is writable,
+                    # we can write up to PIPE_BUF bytes without risk
+                    # blocking.  POSIX defines PIPE_BUF >= 512
+                    chunk = input[input_offset : input_offset + 512]
+                    bytes_written = os.write(self.stdin.fileno(), chunk)
+                    input_offset += bytes_written
+                    if input_offset >= len(input):
+                        self._procs[0].stdin.close()
+                        write_set.remove(self._procs[0].stdin)
+                if self._procs[-1].stdout in rlist:
+                    data = os.read(self._procs[-1].stdout.fileno(), 1024)
+                    if data == '':
+                        self._procs[-1].stdout.close()
+                        read_set.remove(self._procs[-1].stdout)
+                    read_arrays[-1].append(data)
+                for i,proc in enumerate(self._procs):
+                    if proc.stderr in rlist:
+                        data = os.read(proc.stderr.fileno(), 1024)
+                        if data == '':
+                            proc.stderr.close()
+                            read_set.remove(proc.stderr)
+                        read_arrays[i].append(data)
+
+            # All data exchanged.  Translate lists into strings.
+            read_strings = []
+            for read_array in read_arrays:
+                read_strings.append(''.join(read_array))
+
+            stdout = read_strings.pop(-1)
+            stderrs = read_strings
+            return (stdout, stderrs)
+
+if libbe.TESTING == True:
+    suite = doctest.DocTestSuite()
diff --git a/libbe/util/tree.py b/libbe/util/tree.py
new file mode 100644
index 0000000..1daac44
--- /dev/null
+++ b/libbe/util/tree.py
@@ -0,0 +1,193 @@
+# Bugs Everywhere, a distributed bugtracker
+# Copyright (C) 2008-2009 Gianluca Montecchi <gian@grys.it>
+#                         W. Trevor King <wking@drexel.edu>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+"""
+Define a traversable tree structure.
+"""
+
+import libbe
+if libbe.TESTING == True:
+    import doctest
+
+class Tree(list):
+    """
+    Construct
+               +-b---d-g
+             a-+   +-e
+               +-c-+-f-h-i
+    with
+    >>> i = Tree();       i.n = "i"
+    >>> h = Tree([i]);    h.n = "h"
+    >>> f = Tree([h]);    f.n = "f"
+    >>> e = Tree();       e.n = "e"
+    >>> c = Tree([f,e]);  c.n = "c"
+    >>> g = Tree();       g.n = "g"
+    >>> d = Tree([g]);    d.n = "d"
+    >>> b = Tree([d]);    b.n = "b"
+    >>> a = Tree();       a.n = "a"
+    >>> a.append(c)
+    >>> a.append(b)
+
+    >>> a.branch_len()
+    5
+    >>> a.sort(key=lambda node : -node.branch_len())
+    >>> "".join([node.n for node in a.traverse()])
+    'acfhiebdg'
+    >>> a.sort(key=lambda node : node.branch_len())
+    >>> "".join([node.n for node in a.traverse()])
+    'abdgcefhi'
+    >>> "".join([node.n for node in a.traverse(depth_first=False)])
+    'abcdefghi'
+    >>> for depth,node in a.thread():
+    ...     print "%*s" % (2*depth+1, node.n)
+    a
+      b
+        d
+          g
+      c
+        e
+        f
+          h
+            i
+    >>> for depth,node in a.thread(flatten=True):
+    ...     print "%*s" % (2*depth+1, node.n)
+    a
+      b
+      d
+      g
+    c
+      e
+    f
+    h
+    i
+    >>> a.has_descendant(g)
+    True
+    >>> c.has_descendant(g)
+    False
+    >>> a.has_descendant(a)
+    False
+    >>> a.has_descendant(a, match_self=True)
+    True
+    """
+    def __cmp__(self, other):
+        return cmp(id(self), id(other))
+
+    def __eq__(self, other):
+        return self.__cmp__(other) == 0
+
+    def __ne__(self, other):
+        return self.__cmp__(other) != 0
+
+    def branch_len(self):
+        """
+        Exhaustive search every time == SLOW.
+
+        Use only on small trees, or reimplement by overriding
+        child-addition methods to allow accurate caching.
+
+        For the tree
+               +-b---d-g
+             a-+   +-e
+               +-c-+-f-h-i
+        this method returns 5.
+        """
+        if len(self) == 0:
+            return 1
+        else:
+            return 1 + max([child.branch_len() for child in self])
+
+    def sort(self, *args, **kwargs):
+        """
+        This method can be slow, e.g. on a branch_len() sort, since a
+        node at depth N from the root has it's branch_len() method
+        called N times.
+        """
+        list.sort(self, *args, **kwargs)
+        for child in self:
+            child.sort(*args, **kwargs)
+
+    def traverse(self, depth_first=True):
+        """
+        Note: you might want to sort() your tree first.
+        """
+        if depth_first == True:
+            yield self
+            for child in self:
+                for descendant in child.traverse():
+                    yield descendant
+        else: # breadth first, Wikipedia algorithm
+            # http://en.wikipedia.org/wiki/Breadth-first_search
+            queue = [self]
+            while len(queue) > 0:
+                node = queue.pop(0)
+                yield node
+                queue.extend(node)
+
+    def thread(self, flatten=False):
+        """
+        When flatten==False, the depth of any node is one greater than
+        the depth of its parent.  That way the inheritance is
+        explicit, but you can end up with highly indented threads.
+
+        When flatten==True, the depth of any node is only greater than
+        the depth of its parent when there is a branch, and the node
+        is not the last child.  This can lead to ancestry ambiguity,
+        but keeps the total indentation down.  E.g.
+                      +-b                  +-b-c
+                    a-+-c        and     a-+
+                      +-d-e-f              +-d-e-f
+        would both produce (after sorting by branch_len())
+        (0, a)
+        (1, b)
+        (1, c)
+        (0, d)
+        (0, e)
+        (0, f)
+        """
+        stack = [] # ancestry of the current node
+        if flatten == True:
+            depthDict = {}
+
+        for node in self.traverse(depth_first=True):
+            while len(stack) > 0 \
+                    and id(node) not in [id(c) for c in stack[-1]]:
+                stack.pop(-1)
+            if flatten == False:
+                depth = len(stack)
+            else:
+                if len(stack) == 0:
+                    depth = 0
+                else:
+                    parent = stack[-1]
+                    depth = depthDict[id(parent)]
+                    if len(parent) > 1 and node != parent[-1]:
+                        depth += 1
+                depthDict[id(node)] = depth
+            yield (depth,node)
+            stack.append(node)
+
+    def has_descendant(self, descendant, depth_first=True, match_self=False):
+        if descendant == self:
+            return match_self
+        for d in self.traverse(depth_first):
+            if descendant == d:
+                return True
+        return False
+
+if libbe.TESTING == True:
+    suite = doctest.DocTestSuite()
diff --git a/libbe/util/utility.py b/libbe/util/utility.py
new file mode 100644
index 0000000..f954422
--- /dev/null
+++ b/libbe/util/utility.py
@@ -0,0 +1,151 @@
+# Copyright (C) 2005-2009 Aaron Bentley and Panometrics, Inc.
+#                         Gianluca Montecchi <gian@grys.it>
+#                         W. Trevor King <wking@drexel.edu>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+"""
+Assorted utility functions that don't fit in anywhere else.
+"""
+
+import calendar
+import codecs
+import os
+import shutil
+import tempfile
+import time
+import types
+
+import libbe
+if libbe.TESTING == True:
+    import doctest
+
+class InvalidXML(ValueError):
+    """
+    Invalid XML while parsing for a *.from_xml() method.
+    type    - string identifying *, e.g. "bug", "comment", ...
+    element - ElementTree.Element instance which caused the error
+    error   - string describing the error
+    """
+    def __init__(self, type, element, error):
+        msg = 'Invalid %s xml: %s\n  %s\n' \
+            % (type, error, ElementTree.tostring(element))
+        ValueError.__init__(self, msg)
+        self.type = type
+        self.element = element
+        self.error = error
+
+def search_parent_directories(path, filename):
+    """
+    Find the file (or directory) named filename in path or in any
+    of path's parents.
+    
+    e.g.
+    search_parent_directories("/a/b/c", ".be")
+    will return the path to the first existing file from
+    /a/b/c/.be
+    /a/b/.be
+    /a/.be
+    /.be
+    or None if none of those files exist.
+    """
+    path = os.path.realpath(path)
+    assert os.path.exists(path)
+    old_path = None
+    while True:
+        check_path = os.path.join(path, filename)
+        if os.path.exists(check_path):
+            return check_path
+        if path == old_path:
+            return None
+        old_path = path
+        path = os.path.dirname(path)
+
+class Dir (object):
+    "A temporary directory for testing use"
+    def __init__(self):
+        self.path = tempfile.mkdtemp(prefix="BEtest")
+        self.removed = False
+    def cleanup(self):
+        if self.removed == False:
+            shutil.rmtree(self.path)
+            self.removed = True
+    def __call__(self):
+        return self.path
+
+RFC_2822_TIME_FMT = "%a, %d %b %Y %H:%M:%S +0000"
+
+
+def time_to_str(time_val):
+    """Convert a time value into an RFC 2822-formatted string.  This format
+    lacks sub-second data.
+    >>> time_to_str(0)
+    'Thu, 01 Jan 1970 00:00:00 +0000'
+    """
+    return time.strftime(RFC_2822_TIME_FMT, time.gmtime(time_val))
+
+def str_to_time(str_time):
+    """Convert an RFC 2822-fomatted string into a time value.
+    >>> str_to_time("Thu, 01 Jan 1970 00:00:00 +0000")
+    0
+    >>> q = time.time()
+    >>> str_to_time(time_to_str(q)) == int(q)
+    True
+    >>> str_to_time("Thu, 01 Jan 1970 00:00:00 -1000")
+    36000
+    """
+    timezone_str = str_time[-5:]
+    if timezone_str != "+0000":
+        str_time = str_time.replace(timezone_str, "+0000")
+    time_val = calendar.timegm(time.strptime(str_time, RFC_2822_TIME_FMT))
+    timesign = -int(timezone_str[0]+"1") # "+" -> time_val ahead of GMT
+    timezone_tuple = time.strptime(timezone_str[1:], "%H%M")
+    timezone = timezone_tuple.tm_hour*3600 + timezone_tuple.tm_min*60 
+    return time_val + timesign*timezone
+
+def handy_time(time_val):
+    return time.strftime("%a, %d %b %Y %H:%M", time.localtime(time_val))
+
+def time_to_gmtime(str_time):
+    """Convert an RFC 2822-fomatted string to a GMT string.
+    >>> time_to_gmtime("Thu, 01 Jan 1970 00:00:00 -1000")
+    'Thu, 01 Jan 1970 10:00:00 +0000'
+    """
+    time_val = str_to_time(str_time)
+    return time_to_str(time_val)
+
+def iterable_full_of_strings(value, alternative=None):
+    """
+    Require an iterable full of strings.
+    >>> iterable_full_of_strings([])
+    True
+    >>> iterable_full_of_strings(["abc", "def", u"hij"])
+    True
+    >>> iterable_full_of_strings(["abc", None, u"hij"])
+    False
+    >>> iterable_full_of_strings(None, alternative=None)
+    True
+    """
+    if value == alternative:
+        return True
+    elif not hasattr(value, "__iter__"):
+        return False
+    for x in value:
+        if type(x) not in types.StringTypes:
+            return False
+    return True
+
+if libbe.TESTING == True:
+    suite = doctest.DocTestSuite()