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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2022-03-20 10:37
asyncio	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
collections	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
concurrent	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
config-3.5m-x86_64-linux-gnu	[ DIR ]	drwxr-xr-x	2025-04-10 17:07
ctypes	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
curses	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
dbm	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
distutils	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
email	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
encodings	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
html	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
http	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
idlelib	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
importlib	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
json	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
lib-dynload	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
lib2to3	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
logging	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
multiprocessing	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
plat-x86_64-linux-gnu	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
pydoc_data	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
sqlite3	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
test	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
tkinter	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
unittest	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
urllib	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
venv	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
wsgiref	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
xml	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
xmlrpc	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
LICENSE.txt	12.47 KB	-rw-r--r--	2021-11-04 16:29
__future__.py	4.73 KB	-rw-r--r--	2021-11-04 16:29
__phello__.foo.py	64 B	-rw-r--r--	2021-11-04 16:29
_bootlocale.py	1.27 KB	-rw-r--r--	2021-11-04 16:29
_collections_abc.py	24.21 KB	-rw-r--r--	2021-11-04 16:29
_compat_pickle.py	8.36 KB	-rw-r--r--	2021-11-04 16:29
_compression.py	5.21 KB	-rw-r--r--	2021-11-04 16:29
_dummy_thread.py	5 KB	-rw-r--r--	2021-11-04 16:29
_markupbase.py	14.26 KB	-rw-r--r--	2021-11-04 16:29
_osx_support.py	18.66 KB	-rw-r--r--	2021-11-04 16:29
_pydecimal.py	223.27 KB	-rw-r--r--	2021-11-04 16:29
_pyio.py	85.91 KB	-rw-r--r--	2021-11-04 16:29
_sitebuiltins.py	3.04 KB	-rw-r--r--	2021-11-04 16:29
_strptime.py	21.67 KB	-rw-r--r--	2021-11-04 16:29
_sysconfigdata.py	126 B	-rw-r--r--	2021-11-04 15:55
_threading_local.py	7.24 KB	-rw-r--r--	2021-11-04 16:29
_weakrefset.py	5.57 KB	-rw-r--r--	2021-11-04 16:29
abc.py	8.43 KB	-rw-r--r--	2021-11-04 16:29
aifc.py	30.84 KB	-rw-r--r--	2021-11-04 16:29
antigravity.py	476 B	-rw-r--r--	2021-11-04 16:29
argparse.py	88.21 KB	-rw-r--r--	2021-11-04 16:29
ast.py	11.72 KB	-rw-r--r--	2021-11-04 16:29
asynchat.py	11.69 KB	-rw-r--r--	2021-11-04 16:29
asyncore.py	19.63 KB	-rw-r--r--	2021-11-04 16:29
base64.py	19.96 KB	-rwxr-xr-x	2021-11-04 16:29
bdb.py	22.81 KB	-rw-r--r--	2021-11-04 16:29
binhex.py	13.63 KB	-rw-r--r--	2021-11-04 16:29
bisect.py	2.53 KB	-rw-r--r--	2021-11-04 16:29
bz2.py	12.13 KB	-rw-r--r--	2021-11-04 16:29
cProfile.py	5.19 KB	-rwxr-xr-x	2021-11-04 16:29
calendar.py	22.46 KB	-rw-r--r--	2021-11-04 16:29
cgi.py	35.48 KB	-rwxr-xr-x	2021-11-04 16:29
cgitb.py	11.74 KB	-rw-r--r--	2021-11-04 16:29
chunk.py	5.3 KB	-rw-r--r--	2021-11-04 16:29
cmd.py	14.51 KB	-rw-r--r--	2021-11-04 16:29
code.py	9.88 KB	-rw-r--r--	2021-11-04 16:29
codecs.py	35.38 KB	-rw-r--r--	2021-11-04 16:29
codeop.py	5.85 KB	-rw-r--r--	2021-11-04 16:29
colorsys.py	3.97 KB	-rw-r--r--	2021-11-04 16:29
compileall.py	11.44 KB	-rw-r--r--	2021-11-04 16:29
configparser.py	52.2 KB	-rw-r--r--	2021-11-04 16:29
contextlib.py	12.11 KB	-rw-r--r--	2021-11-04 16:29
copy.py	8.74 KB	-rw-r--r--	2021-11-04 16:29
copyreg.py	6.67 KB	-rw-r--r--	2021-11-04 16:29
crypt.py	1.83 KB	-rw-r--r--	2021-11-04 16:29
csv.py	15.75 KB	-rw-r--r--	2021-11-04 16:29
datetime.py	74.12 KB	-rw-r--r--	2021-11-04 16:29
decimal.py	320 B	-rw-r--r--	2021-11-04 16:29
difflib.py	82.23 KB	-rw-r--r--	2021-11-04 16:29
dis.py	16.94 KB	-rw-r--r--	2021-11-04 16:29
doctest.py	101.6 KB	-rw-r--r--	2021-11-04 16:29
dummy_threading.py	2.75 KB	-rw-r--r--	2021-11-04 16:29
enum.py	21.71 KB	-rw-r--r--	2021-11-04 16:29
filecmp.py	9.6 KB	-rw-r--r--	2021-11-04 16:29
fileinput.py	13.92 KB	-rw-r--r--	2021-11-04 16:29
fnmatch.py	3.09 KB	-rw-r--r--	2021-11-04 16:29
formatter.py	14.79 KB	-rw-r--r--	2021-11-04 16:29
fractions.py	24.04 KB	-rw-r--r--	2021-11-04 16:29
ftplib.py	34.01 KB	-rw-r--r--	2021-11-04 16:29
functools.py	28.27 KB	-rw-r--r--	2021-11-04 16:29
genericpath.py	4.26 KB	-rw-r--r--	2021-11-04 16:29
getopt.py	7.31 KB	-rw-r--r--	2021-11-04 16:29
getpass.py	5.91 KB	-rw-r--r--	2021-11-04 16:29
gettext.py	21.09 KB	-rw-r--r--	2021-11-04 16:29
glob.py	4.95 KB	-rw-r--r--	2021-11-04 16:29
gzip.py	19.79 KB	-rw-r--r--	2021-11-04 16:29
hashlib.py	7.79 KB	-rw-r--r--	2021-11-04 16:29
heapq.py	22.39 KB	-rw-r--r--	2021-11-04 16:29
hmac.py	4.94 KB	-rw-r--r--	2021-11-04 16:29
imaplib.py	50.78 KB	-rw-r--r--	2021-11-04 16:29
imghdr.py	3.67 KB	-rw-r--r--	2021-11-04 16:29
imp.py	10.38 KB	-rw-r--r--	2021-11-04 16:29
inspect.py	110.78 KB	-rw-r--r--	2021-11-04 16:29
io.py	3.32 KB	-rw-r--r--	2021-11-04 16:29
ipaddress.py	73.83 KB	-rw-r--r--	2021-11-04 16:29
keyword.py	2.16 KB	-rwxr-xr-x	2021-11-04 16:29
linecache.py	5.19 KB	-rw-r--r--	2021-11-04 16:29
locale.py	72.97 KB	-rw-r--r--	2021-11-04 16:29
lzma.py	12.62 KB	-rw-r--r--	2021-11-04 16:29
macpath.py	5.77 KB	-rw-r--r--	2021-11-04 16:29
macurl2path.py	2.67 KB	-rw-r--r--	2021-11-04 16:29
mailbox.py	76.58 KB	-rw-r--r--	2021-11-04 16:29
mailcap.py	7.91 KB	-rw-r--r--	2021-11-04 16:29
mimetypes.py	20.36 KB	-rw-r--r--	2021-11-04 16:29
modulefinder.py	22.54 KB	-rw-r--r--	2021-11-04 16:29
netrc.py	5.61 KB	-rw-r--r--	2021-11-04 16:29
nntplib.py	42.07 KB	-rw-r--r--	2021-11-04 16:29
ntpath.py	22.26 KB	-rw-r--r--	2021-11-04 16:29
nturl2path.py	2.39 KB	-rw-r--r--	2021-11-04 16:29
numbers.py	10 KB	-rw-r--r--	2021-11-04 16:29
opcode.py	5.75 KB	-rw-r--r--	2021-11-04 16:29
operator.py	10.61 KB	-rw-r--r--	2021-11-04 16:29
optparse.py	58.93 KB	-rw-r--r--	2021-11-04 16:29
os.py	36.08 KB	-rw-r--r--	2021-11-04 16:29
pathlib.py	45.89 KB	-rw-r--r--	2021-11-04 16:29
pdb.py	59.7 KB	-rwxr-xr-x	2021-11-04 16:29
pickle.py	54.86 KB	-rw-r--r--	2021-11-04 16:29
pickletools.py	89.61 KB	-rw-r--r--	2021-11-04 16:29
pipes.py	8.71 KB	-rw-r--r--	2021-11-04 16:29
pkgutil.py	20.66 KB	-rw-r--r--	2021-11-04 16:29
platform.py	45.96 KB	-rwxr-xr-x	2021-11-04 16:29
plistlib.py	30.73 KB	-rw-r--r--	2021-11-04 16:29
poplib.py	14.17 KB	-rw-r--r--	2021-11-04 16:29
posixpath.py	14.56 KB	-rw-r--r--	2021-11-04 16:29
pprint.py	20.37 KB	-rw-r--r--	2021-11-04 16:29
profile.py	21.5 KB	-rwxr-xr-x	2021-11-04 16:29
pstats.py	25.85 KB	-rw-r--r--	2021-11-04 16:29
pty.py	4.65 KB	-rw-r--r--	2021-11-04 16:29
py_compile.py	7.01 KB	-rw-r--r--	2021-11-04 16:29
pyclbr.py	13.25 KB	-rw-r--r--	2021-11-04 16:29
pydoc.py	100.44 KB	-rwxr-xr-x	2021-11-04 16:29
queue.py	8.57 KB	-rw-r--r--	2021-11-04 16:29
quopri.py	7.08 KB	-rwxr-xr-x	2021-11-04 16:29
random.py	25.84 KB	-rw-r--r--	2021-11-04 16:29
re.py	15.14 KB	-rw-r--r--	2021-11-04 16:29
reprlib.py	5.21 KB	-rw-r--r--	2021-11-04 16:29
rlcompleter.py	6.16 KB	-rw-r--r--	2021-11-04 16:29
runpy.py	11.68 KB	-rw-r--r--	2021-11-04 16:29
sched.py	6.07 KB	-rw-r--r--	2021-11-04 16:29
selectors.py	18.98 KB	-rw-r--r--	2021-11-04 16:29
shelve.py	8.33 KB	-rw-r--r--	2021-11-04 16:29
shlex.py	11.18 KB	-rw-r--r--	2021-11-04 16:29
shutil.py	39.11 KB	-rw-r--r--	2021-11-04 16:29
signal.py	2.07 KB	-rw-r--r--	2021-11-04 16:29
site.py	21.74 KB	-rw-r--r--	2021-11-04 16:29
sitecustomize.py	155 B	-rw-r--r--	2017-01-19 15:11
smtpd.py	34.53 KB	-rwxr-xr-x	2021-11-04 16:29
smtplib.py	42.57 KB	-rwxr-xr-x	2021-11-04 16:29
sndhdr.py	6.27 KB	-rw-r--r--	2021-11-04 16:29
socket.py	26.5 KB	-rw-r--r--	2021-11-04 16:29
socketserver.py	24.09 KB	-rw-r--r--	2021-11-04 16:29
sre_compile.py	17.98 KB	-rw-r--r--	2021-11-04 16:29
sre_constants.py	6.3 KB	-rw-r--r--	2021-11-04 16:29
sre_parse.py	34.14 KB	-rw-r--r--	2021-11-04 16:29
ssl.py	41.36 KB	-rw-r--r--	2021-11-04 16:29
stat.py	4.92 KB	-rw-r--r--	2021-11-04 16:29
statistics.py	19.08 KB	-rw-r--r--	2021-11-04 16:29
string.py	11.58 KB	-rw-r--r--	2021-11-04 16:29
stringprep.py	12.61 KB	-rw-r--r--	2021-11-04 16:29
struct.py	257 B	-rw-r--r--	2021-11-04 16:29
subprocess.py	57.12 KB	-rw-r--r--	2021-11-04 16:29
sunau.py	17.67 KB	-rw-r--r--	2021-11-04 16:29
symbol.py	2.04 KB	-rwxr-xr-x	2021-11-04 16:29
symtable.py	7.02 KB	-rw-r--r--	2021-11-04 16:29
sysconfig.py	24.07 KB	-rw-r--r--	2021-11-04 16:29
tabnanny.py	11.13 KB	-rwxr-xr-x	2021-11-04 16:29
tarfile.py	90.96 KB	-rwxr-xr-x	2021-11-04 16:29
telnetlib.py	22.48 KB	-rw-r--r--	2021-11-04 16:29
tempfile.py	30.98 KB	-rw-r--r--	2021-11-04 16:29
textwrap.py	19.1 KB	-rw-r--r--	2021-11-04 16:29
this.py	1003 B	-rw-r--r--	2021-11-04 16:29
threading.py	47.77 KB	-rw-r--r--	2021-11-04 16:29
timeit.py	12.1 KB	-rwxr-xr-x	2021-11-04 16:29
token.py	3 KB	-rw-r--r--	2021-11-04 16:29
tokenize.py	27.14 KB	-rw-r--r--	2021-11-04 16:29
trace.py	30.8 KB	-rwxr-xr-x	2021-11-04 16:29
traceback.py	21.66 KB	-rw-r--r--	2021-11-04 16:29
tracemalloc.py	15.27 KB	-rw-r--r--	2021-11-04 16:29
tty.py	879 B	-rw-r--r--	2021-11-04 16:29
turtle.py	140.25 KB	-rw-r--r--	2021-11-04 16:29
types.py	8.59 KB	-rw-r--r--	2021-11-04 16:29
typing.py	69.02 KB	-rw-r--r--	2021-11-04 16:29
uu.py	6.59 KB	-rwxr-xr-x	2021-11-04 16:29
uuid.py	22.72 KB	-rw-r--r--	2021-11-04 16:29
warnings.py	15.48 KB	-rw-r--r--	2021-11-04 16:29
wave.py	17.27 KB	-rw-r--r--	2021-11-04 16:29
weakref.py	19.95 KB	-rw-r--r--	2021-11-04 16:29
webbrowser.py	21.3 KB	-rwxr-xr-x	2021-11-04 16:29
xdrlib.py	5.77 KB	-rw-r--r--	2021-11-04 16:29
zipapp.py	6.99 KB	-rw-r--r--	2021-11-04 16:29
zipfile.py	72.12 KB	-rw-r--r--	2021-11-04 16:29

Rename

from collections import Sequence, Iterable
from functools import total_ordering
import fnmatch
import linecache
import os.path
import pickle

# Import types and functions implemented in C
from _tracemalloc import *
from _tracemalloc import _get_object_traceback, _get_traces

def _format_size(size, sign):
    for unit in ('B', 'KiB', 'MiB', 'GiB', 'TiB'):
        if abs(size) < 100 and unit != 'B':
            # 3 digits (xx.x UNIT)
            if sign:
                return "%+.1f %s" % (size, unit)
            else:
                return "%.1f %s" % (size, unit)
        if abs(size) < 10 * 1024 or unit == 'TiB':
            # 4 or 5 digits (xxxx UNIT)
            if sign:
                return "%+.0f %s" % (size, unit)
            else:
                return "%.0f %s" % (size, unit)
        size /= 1024

class Statistic:
    """
    Statistic difference on memory allocations between two Snapshot instance.
    """

__slots__ = ('traceback', 'size', 'count')

def __init__(self, traceback, size, count):
        self.traceback = traceback
        self.size = size
        self.count = count

def __hash__(self):
        return hash((self.traceback, self.size, self.count))

def __eq__(self, other):
        return (self.traceback == other.traceback
                and self.size == other.size
                and self.count == other.count)

def __str__(self):
        text = ("%s: size=%s, count=%i"
                 % (self.traceback,
                    _format_size(self.size, False),
                    self.count))
        if self.count:
            average = self.size / self.count
            text += ", average=%s" % _format_size(average, False)
        return text

def __repr__(self):
        return ('<Statistic traceback=%r size=%i count=%i>'
                % (self.traceback, self.size, self.count))

def _sort_key(self):
        return (self.size, self.count, self.traceback)

class StatisticDiff:
    """
    Statistic difference on memory allocations between an old and a new
    Snapshot instance.
    """
    __slots__ = ('traceback', 'size', 'size_diff', 'count', 'count_diff')

def __init__(self, traceback, size, size_diff, count, count_diff):
        self.traceback = traceback
        self.size = size
        self.size_diff = size_diff
        self.count = count
        self.count_diff = count_diff

def __hash__(self):
        return hash((self.traceback, self.size, self.size_diff,
                     self.count, self.count_diff))

def __eq__(self, other):
        return (self.traceback == other.traceback
                and self.size == other.size
                and self.size_diff == other.size_diff
                and self.count == other.count
                and self.count_diff == other.count_diff)

def __str__(self):
        text = ("%s: size=%s (%s), count=%i (%+i)"
                % (self.traceback,
                   _format_size(self.size, False),
                   _format_size(self.size_diff, True),
                   self.count,
                   self.count_diff))
        if self.count:
            average = self.size / self.count
            text += ", average=%s" % _format_size(average, False)
        return text

def __repr__(self):
        return ('<StatisticDiff traceback=%r size=%i (%+i) count=%i (%+i)>'
                % (self.traceback, self.size, self.size_diff,
                   self.count, self.count_diff))

def _sort_key(self):
        return (abs(self.size_diff), self.size,
                abs(self.count_diff), self.count,
                self.traceback)

def _compare_grouped_stats(old_group, new_group):
    statistics = []
    for traceback, stat in new_group.items():
        previous = old_group.pop(traceback, None)
        if previous is not None:
            stat = StatisticDiff(traceback,
                                 stat.size, stat.size - previous.size,
                                 stat.count, stat.count - previous.count)
        else:
            stat = StatisticDiff(traceback,
                                 stat.size, stat.size,
                                 stat.count, stat.count)
        statistics.append(stat)

for traceback, stat in old_group.items():
        stat = StatisticDiff(traceback, 0, -stat.size, 0, -stat.count)
        statistics.append(stat)
    return statistics

@total_ordering
class Frame:
    """
    Frame of a traceback.
    """
    __slots__ = ("_frame",)

def __init__(self, frame):
        # frame is a tuple: (filename: str, lineno: int)
        self._frame = frame

@property
    def filename(self):
        return self._frame[0]

@property
    def lineno(self):
        return self._frame[1]

def __eq__(self, other):
        return (self._frame == other._frame)

def __lt__(self, other):
        return (self._frame < other._frame)

def __hash__(self):
        return hash(self._frame)

def __str__(self):
        return "%s:%s" % (self.filename, self.lineno)

def __repr__(self):
        return "<Frame filename=%r lineno=%r>" % (self.filename, self.lineno)

@total_ordering
class Traceback(Sequence):
    """
    Sequence of Frame instances sorted from the most recent frame
    to the oldest frame.
    """
    __slots__ = ("_frames",)

def __init__(self, frames):
        Sequence.__init__(self)
        # frames is a tuple of frame tuples: see Frame constructor for the
        # format of a frame tuple
        self._frames = frames

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

def __getitem__(self, index):
        if isinstance(index, slice):
            return tuple(Frame(trace) for trace in self._frames[index])
        else:
            return Frame(self._frames[index])

def __contains__(self, frame):
        return frame._frame in self._frames

def __hash__(self):
        return hash(self._frames)

def __eq__(self, other):
        return (self._frames == other._frames)

def __lt__(self, other):
        return (self._frames < other._frames)

def __str__(self):
        return str(self[0])

def __repr__(self):
        return "<Traceback %r>" % (tuple(self),)

def format(self, limit=None):
        lines = []
        if limit is not None and limit < 0:
            return lines
        for frame in self[:limit]:
            lines.append('  File "%s", line %s'
                         % (frame.filename, frame.lineno))
            line = linecache.getline(frame.filename, frame.lineno).strip()
            if line:
                lines.append('    %s' % line)
        return lines

def get_object_traceback(obj):
    """
    Get the traceback where the Python object *obj* was allocated.
    Return a Traceback instance.

Return None if the tracemalloc module is not tracing memory allocations or
    did not trace the allocation of the object.
    """
    frames = _get_object_traceback(obj)
    if frames is not None:
        return Traceback(frames)
    else:
        return None

class Trace:
    """
    Trace of a memory block.
    """
    __slots__ = ("_trace",)

def __init__(self, trace):
        # trace is a tuple: (size, traceback), see Traceback constructor
        # for the format of the traceback tuple
        self._trace = trace

@property
    def size(self):
        return self._trace[0]

@property
    def traceback(self):
        return Traceback(self._trace[1])

def __eq__(self, other):
        return (self._trace == other._trace)

def __hash__(self):
        return hash(self._trace)

def __str__(self):
        return "%s: %s" % (self.traceback, _format_size(self.size, False))

def __repr__(self):
        return ("<Trace size=%s, traceback=%r>"
                % (_format_size(self.size, False), self.traceback))

class _Traces(Sequence):
    def __init__(self, traces):
        Sequence.__init__(self)
        # traces is a tuple of trace tuples: see Trace constructor
        self._traces = traces

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

def __getitem__(self, index):
        if isinstance(index, slice):
            return tuple(Trace(trace) for trace in self._traces[index])
        else:
            return Trace(self._traces[index])

def __contains__(self, trace):
        return trace._trace in self._traces

def __eq__(self, other):
        return (self._traces == other._traces)

def __repr__(self):
        return "<Traces len=%s>" % len(self)

def _normalize_filename(filename):
    filename = os.path.normcase(filename)
    if filename.endswith('.pyc'):
        filename = filename[:-1]
    return filename

class Filter:
    def __init__(self, inclusive, filename_pattern,
                 lineno=None, all_frames=False):
        self.inclusive = inclusive
        self._filename_pattern = _normalize_filename(filename_pattern)
        self.lineno = lineno
        self.all_frames = all_frames

@property
    def filename_pattern(self):
        return self._filename_pattern

def __match_frame(self, filename, lineno):
        filename = _normalize_filename(filename)
        if not fnmatch.fnmatch(filename, self._filename_pattern):
            return False
        if self.lineno is None:
            return True
        else:
            return (lineno == self.lineno)

def _match_frame(self, filename, lineno):
        return self.__match_frame(filename, lineno) ^ (not self.inclusive)

def _match_traceback(self, traceback):
        if self.all_frames:
            if any(self.__match_frame(filename, lineno)
                   for filename, lineno in traceback):
                return self.inclusive
            else:
                return (not self.inclusive)
        else:
            filename, lineno = traceback[0]
            return self._match_frame(filename, lineno)

class Snapshot:
    """
    Snapshot of traces of memory blocks allocated by Python.
    """

def __init__(self, traces, traceback_limit):
        # traces is a tuple of trace tuples: see _Traces constructor for
        # the exact format
        self.traces = _Traces(traces)
        self.traceback_limit = traceback_limit

def dump(self, filename):
        """
        Write the snapshot into a file.
        """
        with open(filename, "wb") as fp:
            pickle.dump(self, fp, pickle.HIGHEST_PROTOCOL)

@staticmethod
    def load(filename):
        """
        Load a snapshot from a file.
        """
        with open(filename, "rb") as fp:
            return pickle.load(fp)

def _filter_trace(self, include_filters, exclude_filters, trace):
        traceback = trace[1]
        if include_filters:
            if not any(trace_filter._match_traceback(traceback)
                       for trace_filter in include_filters):
                return False
        if exclude_filters:
            if any(not trace_filter._match_traceback(traceback)
                   for trace_filter in exclude_filters):
                return False
        return True

def filter_traces(self, filters):
        """
        Create a new Snapshot instance with a filtered traces sequence, filters
        is a list of Filter instances.  If filters is an empty list, return a
        new Snapshot instance with a copy of the traces.
        """
        if not isinstance(filters, Iterable):
            raise TypeError("filters must be a list of filters, not %s"
                            % type(filters).__name__)
        if filters:
            include_filters = []
            exclude_filters = []
            for trace_filter in filters:
                if trace_filter.inclusive:
                    include_filters.append(trace_filter)
                else:
                    exclude_filters.append(trace_filter)
            new_traces = [trace for trace in self.traces._traces
                          if self._filter_trace(include_filters,
                                                exclude_filters,
                                                trace)]
        else:
            new_traces = self.traces._traces.copy()
        return Snapshot(new_traces, self.traceback_limit)

def _group_by(self, key_type, cumulative):
        if key_type not in ('traceback', 'filename', 'lineno'):
            raise ValueError("unknown key_type: %r" % (key_type,))
        if cumulative and key_type not in ('lineno', 'filename'):
            raise ValueError("cumulative mode cannot by used "
                             "with key type %r" % key_type)

stats = {}
        tracebacks = {}
        if not cumulative:
            for trace in self.traces._traces:
                size, trace_traceback = trace
                try:
                    traceback = tracebacks[trace_traceback]
                except KeyError:
                    if key_type == 'traceback':
                        frames = trace_traceback
                    elif key_type == 'lineno':
                        frames = trace_traceback[:1]
                    else: # key_type == 'filename':
                        frames = ((trace_traceback[0][0], 0),)
                    traceback = Traceback(frames)
                    tracebacks[trace_traceback] = traceback
                try:
                    stat = stats[traceback]
                    stat.size += size
                    stat.count += 1
                except KeyError:
                    stats[traceback] = Statistic(traceback, size, 1)
        else:
            # cumulative statistics
            for trace in self.traces._traces:
                size, trace_traceback = trace
                for frame in trace_traceback:
                    try:
                        traceback = tracebacks[frame]
                    except KeyError:
                        if key_type == 'lineno':
                            frames = (frame,)
                        else: # key_type == 'filename':
                            frames = ((frame[0], 0),)
                        traceback = Traceback(frames)
                        tracebacks[frame] = traceback
                    try:
                        stat = stats[traceback]
                        stat.size += size
                        stat.count += 1
                    except KeyError:
                        stats[traceback] = Statistic(traceback, size, 1)
        return stats

def statistics(self, key_type, cumulative=False):
        """
        Group statistics by key_type. Return a sorted list of Statistic
        instances.
        """
        grouped = self._group_by(key_type, cumulative)
        statistics = list(grouped.values())
        statistics.sort(reverse=True, key=Statistic._sort_key)
        return statistics

def compare_to(self, old_snapshot, key_type, cumulative=False):
        """
        Compute the differences with an old snapshot old_snapshot. Get
        statistics as a sorted list of StatisticDiff instances, grouped by
        group_by.
        """
        new_group = self._group_by(key_type, cumulative)
        old_group = old_snapshot._group_by(key_type, cumulative)
        statistics = _compare_grouped_stats(old_group, new_group)
        statistics.sort(reverse=True, key=StatisticDiff._sort_key)
        return statistics

def take_snapshot():
    """
    Take a snapshot of traces of memory blocks allocated by Python.
    """
    if not is_tracing():
        raise RuntimeError("the tracemalloc module must be tracing memory "
                           "allocations to take a snapshot")
    traces = _get_traces()
    traceback_limit = get_traceback_limit()
    return Snapshot(traces, traceback_limit)