FM / python3.6

/snap/core18/2979/usr/lib/python3.6

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
pydoc_data/	-	0755	rm
sqlite3/	-	0755	rm
test/	-	0755	rm
unittest/	-	0755	rm
urllib/	-	0755	rm
venv/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
xmlrpc/	-	0755	rm
__pycache__/	-	0755	rm
abc.py	8727	0644	edit dl rm
aifc.py	32454	0644	edit dl rm
antigravity.py	477	0644	edit dl rm
argparse.py	90568	0644	edit dl rm
ast.py	12166	0644	edit dl rm
asynchat.py	11328	0644	edit dl rm
asyncore.py	20159	0644	edit dl rm
base64.py	20378	0755	edit dl rm
bdb.py	23556	0644	edit dl rm
binhex.py	13954	0644	edit dl rm
bisect.py	2595	0644	edit dl rm
bz2.py	12478	0644	edit dl rm
calendar.py	23213	0644	edit dl rm
cgi.py	36791	0755	edit dl rm
cgitb.py	12018	0644	edit dl rm
chunk.py	5425	0644	edit dl rm
cmd.py	14860	0644	edit dl rm
code.py	10614	0644	edit dl rm
codecs.py	36276	0644	edit dl rm
codeop.py	5994	0644	edit dl rm
colorsys.py	4064	0644	edit dl rm
compileall.py	12125	0644	edit dl rm
configparser.py	53592	0644	edit dl rm
contextlib.py	13162	0644	edit dl rm
copy.py	8815	0644	edit dl rm
copyreg.py	7007	0644	edit dl rm
cProfile.py	5370	0755	edit dl rm
crypt.py	1864	0644	edit dl rm
csv.py	16180	0644	edit dl rm
datetime.py	82034	0644	edit dl rm
decimal.py	320	0644	edit dl rm
difflib.py	84377	0644	edit dl rm
dis.py	18132	0644	edit dl rm
doctest.py	104391	0644	edit dl rm
dummy_threading.py	2815	0644	edit dl rm
enum.py	33606	0644	edit dl rm
filecmp.py	9830	0644	edit dl rm
fileinput.py	14471	0644	edit dl rm
fnmatch.py	3166	0644	edit dl rm
formatter.py	15143	0644	edit dl rm
fractions.py	23639	0644	edit dl rm
ftplib.py	35617	0644	edit dl rm
functools.py	31346	0644	edit dl rm
genericpath.py	4756	0644	edit dl rm
getopt.py	7489	0644	edit dl rm
getpass.py	5994	0644	edit dl rm
gettext.py	21957	0644	edit dl rm
glob.py	5638	0644	edit dl rm
gzip.py	20334	0644	edit dl rm
hashlib.py	9533	0644	edit dl rm
heapq.py	22929	0644	edit dl rm
hmac.py	5057	0644	edit dl rm
imaplib.py	53295	0644	edit dl rm
imghdr.py	3795	0644	edit dl rm
imp.py	10669	0644	edit dl rm
inspect.py	116958	0644	edit dl rm
io.py	3517	0644	edit dl rm
ipaddress.py	74563	0644	edit dl rm
keyword.py	2209	0755	edit dl rm
LICENSE.txt	12769	0644	edit dl rm
linecache.py	5312	0644	edit dl rm
locale.py	77304	0644	edit dl rm
lzma.py	12983	0644	edit dl rm
macpath.py	5971	0644	edit dl rm
macurl2path.py	2732	0644	edit dl rm
mailbox.py	78624	0644	edit dl rm
mailcap.py	9067	0644	edit dl rm
mimetypes.py	21042	0644	edit dl rm
modulefinder.py	23027	0644	edit dl rm
netrc.py	5684	0644	edit dl rm
nntplib.py	43078	0644	edit dl rm
ntpath.py	21174	0644	edit dl rm
nturl2path.py	2444	0644	edit dl rm
numbers.py	10243	0644	edit dl rm
opcode.py	5822	0644	edit dl rm
operator.py	10863	0644	edit dl rm
optparse.py	60371	0644	edit dl rm
os.py	37526	0644	edit dl rm
pathlib.py	48982	0644	edit dl rm
pdb.py	61310	0755	edit dl rm
pickle.py	55691	0644	edit dl rm
pickletools.py	91775	0644	edit dl rm
pipes.py	8916	0644	edit dl rm
pkgutil.py	21315	0644	edit dl rm
platform.py	48198	0755	edit dl rm
plistlib.py	32787	0644	edit dl rm
poplib.py	14964	0644	edit dl rm
posixpath.py	15645	0644	edit dl rm
pprint.py	20860	0644	edit dl rm
profile.py	22019	0755	edit dl rm
pstats.py	26564	0644	edit dl rm
pty.py	4763	0644	edit dl rm
pyclbr.py	13558	0644	edit dl rm
pydoc.py	103818	0755	edit dl rm
py_compile.py	7181	0644	edit dl rm
queue.py	8780	0644	edit dl rm
quopri.py	7252	0755	edit dl rm
random.py	27442	0644	edit dl rm
re.py	15552	0644	edit dl rm
reprlib.py	5336	0644	edit dl rm
rlcompleter.py	7097	0644	edit dl rm
runpy.py	11959	0644	edit dl rm
sched.py	6511	0644	edit dl rm
secrets.py	2038	0644	edit dl rm
selectors.py	19438	0644	edit dl rm
shelve.py	8515	0644	edit dl rm
shlex.py	12956	0644	edit dl rm
shutil.py	40540	0644	edit dl rm
signal.py	2123	0644	edit dl rm
site.py	21766	0644	edit dl rm
sitecustomize.py	-	0	edit dl rm
smtpd.py	34709	0755	edit dl rm
smtplib.py	44208	0755	edit dl rm
sndhdr.py	7088	0644	edit dl rm
socket.py	27443	0644	edit dl rm
socketserver.py	27010	0644	edit dl rm
sre_compile.py	19338	0644	edit dl rm
sre_constants.py	6821	0644	edit dl rm
sre_parse.py	36536	0644	edit dl rm
ssl.py	46400	0644	edit dl rm
stat.py	5038	0644	edit dl rm
statistics.py	20673	0644	edit dl rm
string.py	11795	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	62339	0644	edit dl rm
sunau.py	18095	0644	edit dl rm
symbol.py	2109	0755	edit dl rm
symtable.py	7277	0644	edit dl rm
sysconfig.py	25057	0644	edit dl rm
tabnanny.py	11401	0755	edit dl rm
tarfile.py	94969	0755	edit dl rm
telnetlib.py	23136	0644	edit dl rm
tempfile.py	31867	0644	edit dl rm
textwrap.py	19558	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	49029	0644	edit dl rm
timeit.py	13332	0755	edit dl rm
token.py	3075	0644	edit dl rm
tokenize.py	29496	0644	edit dl rm
trace.py	28723	0755	edit dl rm
traceback.py	23458	0644	edit dl rm
tracemalloc.py	16658	0644	edit dl rm
tty.py	879	0644	edit dl rm
turtle.py	143620	0644	edit dl rm
types.py	8870	0644	edit dl rm
typing.py	80274	0644	edit dl rm
uu.py	6753	0755	edit dl rm
uuid.py	23971	0644	edit dl rm
warnings.py	18488	0644	edit dl rm
wave.py	17709	0644	edit dl rm
weakref.py	20466	0644	edit dl rm
webbrowser.py	21757	0755	edit dl rm
xdrlib.py	5913	0644	edit dl rm
zipapp.py	7157	0644	edit dl rm
zipfile.py	78184	0644	edit dl rm
_bootlocale.py	1301	0644	edit dl rm
_collections_abc.py	26392	0644	edit dl rm
_compat_pickle.py	8749	0644	edit dl rm
_compression.py	5340	0644	edit dl rm
_dummy_thread.py	5118	0644	edit dl rm
_markupbase.py	14598	0644	edit dl rm
_osx_support.py	19119	0644	edit dl rm
_pydecimal.py	230228	0644	edit dl rm
_pyio.py	88097	0644	edit dl rm
_sitebuiltins.py	3115	0644	edit dl rm
_strptime.py	24747	0644	edit dl rm
_sysconfigdata_m_linux_x86_64-linux-gnu.py	22325	0644	edit dl rm
_threading_local.py	7214	0644	edit dl rm
_weakrefset.py	5705	0644	edit dl rm
__future__.py	4841	0644	edit dl rm
__phello__.foo.py	64	0644	edit dl rm

Edit: /snap/core18/2979/usr/lib/python3.6/shelve.py (8515B)

"""Manage shelves of pickled objects.

A "shelf" is a persistent, dictionary-like object.  The difference
with dbm databases is that the values (not the keys!) in a shelf can
be essentially arbitrary Python objects -- anything that the "pickle"
module can handle.  This includes most class instances, recursive data
types, and objects containing lots of shared sub-objects.  The keys
are ordinary strings.

To summarize the interface (key is a string, data is an arbitrary
object):

import shelve
        d = shelve.open(filename) # open, with (g)dbm filename -- no suffix

d[key] = data   # store data at key (overwrites old data if
                        # using an existing key)
        data = d[key]   # retrieve a COPY of the data at key (raise
                        # KeyError if no such key) -- NOTE that this
                        # access returns a *copy* of the entry!
        del d[key]      # delete data stored at key (raises KeyError
                        # if no such key)
        flag = key in d # true if the key exists
        list = d.keys() # a list of all existing keys (slow!)

d.close()       # close it

Dependent on the implementation, closing a persistent dictionary may
or may not be necessary to flush changes to disk.

Normally, d[key] returns a COPY of the entry.  This needs care when
mutable entries are mutated: for example, if d[key] is a list,
        d[key].append(anitem)
does NOT modify the entry d[key] itself, as stored in the persistent
mapping -- it only modifies the copy, which is then immediately
discarded, so that the append has NO effect whatsoever.  To append an
item to d[key] in a way that will affect the persistent mapping, use:
        data = d[key]
        data.append(anitem)
        d[key] = data

To avoid the problem with mutable entries, you may pass the keyword
argument writeback=True in the call to shelve.open.  When you use:
        d = shelve.open(filename, writeback=True)
then d keeps a cache of all entries you access, and writes them all back
to the persistent mapping when you call d.close().  This ensures that
such usage as d[key].append(anitem) works as intended.

However, using keyword argument writeback=True may consume vast amount
of memory for the cache, and it may make d.close() very slow, if you
access many of d's entries after opening it in this way: d has no way to
check which of the entries you access are mutable and/or which ones you
actually mutate, so it must cache, and write back at close, all of the
entries that you access.  You can call d.sync() to write back all the
entries in the cache, and empty the cache (d.sync() also synchronizes
the persistent dictionary on disk, if feasible).
"""

from pickle import Pickler, Unpickler
from io import BytesIO

import collections

__all__ = ["Shelf", "BsdDbShelf", "DbfilenameShelf", "open"]

class _ClosedDict(collections.MutableMapping):
    'Marker for a closed dict.  Access attempts raise a ValueError.'

def closed(self, *args):
        raise ValueError('invalid operation on closed shelf')
    __iter__ = __len__ = __getitem__ = __setitem__ = __delitem__ = keys = closed

def __repr__(self):
        return '<Closed Dictionary>'

class Shelf(collections.MutableMapping):
    """Base class for shelf implementations.

This is initialized with a dictionary-like object.
    See the module's __doc__ string for an overview of the interface.
    """

def __init__(self, dict, protocol=None, writeback=False,
                 keyencoding="utf-8"):
        self.dict = dict
        if protocol is None:
            protocol = 3
        self._protocol = protocol
        self.writeback = writeback
        self.cache = {}
        self.keyencoding = keyencoding

def __iter__(self):
        for k in self.dict.keys():
            yield k.decode(self.keyencoding)

def __len__(self):
        return len(self.dict)

def __contains__(self, key):
        return key.encode(self.keyencoding) in self.dict

def get(self, key, default=None):
        if key.encode(self.keyencoding) in self.dict:
            return self[key]
        return default

def __getitem__(self, key):
        try:
            value = self.cache[key]
        except KeyError:
            f = BytesIO(self.dict[key.encode(self.keyencoding)])
            value = Unpickler(f).load()
            if self.writeback:
                self.cache[key] = value
        return value

def __setitem__(self, key, value):
        if self.writeback:
            self.cache[key] = value
        f = BytesIO()
        p = Pickler(f, self._protocol)
        p.dump(value)
        self.dict[key.encode(self.keyencoding)] = f.getvalue()

def __delitem__(self, key):
        del self.dict[key.encode(self.keyencoding)]
        try:
            del self.cache[key]
        except KeyError:
            pass

def __enter__(self):
        return self

def __exit__(self, type, value, traceback):
        self.close()

def close(self):
        if self.dict is None:
            return
        try:
            self.sync()
            try:
                self.dict.close()
            except AttributeError:
                pass
        finally:
            # Catch errors that may happen when close is called from __del__
            # because CPython is in interpreter shutdown.
            try:
                self.dict = _ClosedDict()
            except:
                self.dict = None

def __del__(self):
        if not hasattr(self, 'writeback'):
            # __init__ didn't succeed, so don't bother closing
            # see http://bugs.python.org/issue1339007 for details
            return
        self.close()

def sync(self):
        if self.writeback and self.cache:
            self.writeback = False
            for key, entry in self.cache.items():
                self[key] = entry
            self.writeback = True
            self.cache = {}
        if hasattr(self.dict, 'sync'):
            self.dict.sync()

class BsdDbShelf(Shelf):
    """Shelf implementation using the "BSD" db interface.

This adds methods first(), next(), previous(), last() and
    set_location() that have no counterpart in [g]dbm databases.

The actual database must be opened using one of the "bsddb"
    modules "open" routines (i.e. bsddb.hashopen, bsddb.btopen or
    bsddb.rnopen) and passed to the constructor.

See the module's __doc__ string for an overview of the interface.
    """

def __init__(self, dict, protocol=None, writeback=False,
                 keyencoding="utf-8"):
        Shelf.__init__(self, dict, protocol, writeback, keyencoding)

def set_location(self, key):
        (key, value) = self.dict.set_location(key)
        f = BytesIO(value)
        return (key.decode(self.keyencoding), Unpickler(f).load())

def next(self):
        (key, value) = next(self.dict)
        f = BytesIO(value)
        return (key.decode(self.keyencoding), Unpickler(f).load())

def previous(self):
        (key, value) = self.dict.previous()
        f = BytesIO(value)
        return (key.decode(self.keyencoding), Unpickler(f).load())

def first(self):
        (key, value) = self.dict.first()
        f = BytesIO(value)
        return (key.decode(self.keyencoding), Unpickler(f).load())

def last(self):
        (key, value) = self.dict.last()
        f = BytesIO(value)
        return (key.decode(self.keyencoding), Unpickler(f).load())

class DbfilenameShelf(Shelf):
    """Shelf implementation using the "dbm" generic dbm interface.

This is initialized with the filename for the dbm database.
    See the module's __doc__ string for an overview of the interface.
    """

def __init__(self, filename, flag='c', protocol=None, writeback=False):
        import dbm
        Shelf.__init__(self, dbm.open(filename, flag), protocol, writeback)

def open(filename, flag='c', protocol=None, writeback=False):
    """Open a persistent dictionary for reading and writing.

The filename parameter is the base filename for the underlying
    database.  As a side-effect, an extension may be added to the
    filename and more than one file may be created.  The optional flag
    parameter has the same interpretation as the flag parameter of
    dbm.open(). The optional protocol parameter specifies the
    version of the pickle protocol.

See the module's __doc__ string for an overview of the interface.
    """

return DbfilenameShelf(filename, flag, protocol, writeback)

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