/usr/lib/python2.7/dist-packages/pyqtgraph/debug.py is in python-pyqtgraph 0.9.8-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 | # -*- coding: utf-8 -*-
"""
debug.py - Functions to aid in debugging
Copyright 2010 Luke Campagnola
Distributed under MIT/X11 license. See license.txt for more infomation.
"""
import sys, traceback, time, gc, re, types, weakref, inspect, os, cProfile
from . import ptime
from numpy import ndarray
from .Qt import QtCore, QtGui
__ftraceDepth = 0
def ftrace(func):
"""Decorator used for marking the beginning and end of function calls.
Automatically indents nested calls.
"""
def w(*args, **kargs):
global __ftraceDepth
pfx = " " * __ftraceDepth
print(pfx + func.__name__ + " start")
__ftraceDepth += 1
try:
rv = func(*args, **kargs)
finally:
__ftraceDepth -= 1
print(pfx + func.__name__ + " done")
return rv
return w
def warnOnException(func):
"""Decorator which catches/ignores exceptions and prints a stack trace."""
def w(*args, **kwds):
try:
func(*args, **kwds)
except:
printExc('Ignored exception:')
return w
def getExc(indent=4, prefix='| '):
tb = traceback.format_exc()
lines = []
for l in tb.split('\n'):
lines.append(" "*indent + prefix + l)
return '\n'.join(lines)
def printExc(msg='', indent=4, prefix='|'):
"""Print an error message followed by an indented exception backtrace
(This function is intended to be called within except: blocks)"""
exc = getExc(indent, prefix + ' ')
print("[%s] %s\n" % (time.strftime("%H:%M:%S"), msg))
print(" "*indent + prefix + '='*30 + '>>')
print(exc)
print(" "*indent + prefix + '='*30 + '<<')
def printTrace(msg='', indent=4, prefix='|'):
"""Print an error message followed by an indented stack trace"""
trace = backtrace(1)
#exc = getExc(indent, prefix + ' ')
print("[%s] %s\n" % (time.strftime("%H:%M:%S"), msg))
print(" "*indent + prefix + '='*30 + '>>')
for line in trace.split('\n'):
print(" "*indent + prefix + " " + line)
print(" "*indent + prefix + '='*30 + '<<')
def backtrace(skip=0):
return ''.join(traceback.format_stack()[:-(skip+1)])
def listObjs(regex='Q', typ=None):
"""List all objects managed by python gc with class name matching regex.
Finds 'Q...' classes by default."""
if typ is not None:
return [x for x in gc.get_objects() if isinstance(x, typ)]
else:
return [x for x in gc.get_objects() if re.match(regex, type(x).__name__)]
def findRefPath(startObj, endObj, maxLen=8, restart=True, seen={}, path=None, ignore=None):
"""Determine all paths of object references from startObj to endObj"""
refs = []
if path is None:
path = [endObj]
if ignore is None:
ignore = {}
ignore[id(sys._getframe())] = None
ignore[id(path)] = None
ignore[id(seen)] = None
prefix = " "*(8-maxLen)
#print prefix + str(map(type, path))
prefix += " "
if restart:
#gc.collect()
seen.clear()
gc.collect()
newRefs = [r for r in gc.get_referrers(endObj) if id(r) not in ignore]
ignore[id(newRefs)] = None
#fo = allFrameObjs()
#newRefs = []
#for r in gc.get_referrers(endObj):
#try:
#if r not in fo:
#newRefs.append(r)
#except:
#newRefs.append(r)
for r in newRefs:
#print prefix+"->"+str(type(r))
if type(r).__name__ in ['frame', 'function', 'listiterator']:
#print prefix+" FRAME"
continue
try:
if any([r is x for x in path]):
#print prefix+" LOOP", objChainString([r]+path)
continue
except:
print(r)
print(path)
raise
if r is startObj:
refs.append([r])
print(refPathString([startObj]+path))
continue
if maxLen == 0:
#print prefix+" END:", objChainString([r]+path)
continue
## See if we have already searched this node.
## If not, recurse.
tree = None
try:
cache = seen[id(r)]
if cache[0] >= maxLen:
tree = cache[1]
for p in tree:
print(refPathString(p+path))
except KeyError:
pass
ignore[id(tree)] = None
if tree is None:
tree = findRefPath(startObj, r, maxLen-1, restart=False, path=[r]+path, ignore=ignore)
seen[id(r)] = [maxLen, tree]
## integrate any returned results
if len(tree) == 0:
#print prefix+" EMPTY TREE"
continue
else:
for p in tree:
refs.append(p+[r])
#seen[id(r)] = [maxLen, refs]
return refs
def objString(obj):
"""Return a short but descriptive string for any object"""
try:
if type(obj) in [int, float]:
return str(obj)
elif isinstance(obj, dict):
if len(obj) > 5:
return "<dict {%s,...}>" % (",".join(list(obj.keys())[:5]))
else:
return "<dict {%s}>" % (",".join(list(obj.keys())))
elif isinstance(obj, str):
if len(obj) > 50:
return '"%s..."' % obj[:50]
else:
return obj[:]
elif isinstance(obj, ndarray):
return "<ndarray %s %s>" % (str(obj.dtype), str(obj.shape))
elif hasattr(obj, '__len__'):
if len(obj) > 5:
return "<%s [%s,...]>" % (type(obj).__name__, ",".join([type(o).__name__ for o in obj[:5]]))
else:
return "<%s [%s]>" % (type(obj).__name__, ",".join([type(o).__name__ for o in obj]))
else:
return "<%s %s>" % (type(obj).__name__, obj.__class__.__name__)
except:
return str(type(obj))
def refPathString(chain):
"""Given a list of adjacent objects in a reference path, print the 'natural' path
names (ie, attribute names, keys, and indexes) that follow from one object to the next ."""
s = objString(chain[0])
i = 0
while i < len(chain)-1:
#print " -> ", i
i += 1
o1 = chain[i-1]
o2 = chain[i]
cont = False
if isinstance(o1, list) or isinstance(o1, tuple):
if any([o2 is x for x in o1]):
s += "[%d]" % o1.index(o2)
continue
#print " not list"
if isinstance(o2, dict) and hasattr(o1, '__dict__') and o2 == o1.__dict__:
i += 1
if i >= len(chain):
s += ".__dict__"
continue
o3 = chain[i]
for k in o2:
if o2[k] is o3:
s += '.%s' % k
cont = True
continue
#print " not __dict__"
if isinstance(o1, dict):
try:
if o2 in o1:
s += "[key:%s]" % objString(o2)
continue
except TypeError:
pass
for k in o1:
if o1[k] is o2:
s += "[%s]" % objString(k)
cont = True
continue
#print " not dict"
#for k in dir(o1): ## Not safe to request attributes like this.
#if getattr(o1, k) is o2:
#s += ".%s" % k
#cont = True
#continue
#print " not attr"
if cont:
continue
s += " ? "
sys.stdout.flush()
return s
def objectSize(obj, ignore=None, verbose=False, depth=0, recursive=False):
"""Guess how much memory an object is using"""
ignoreTypes = [types.MethodType, types.UnboundMethodType, types.BuiltinMethodType, types.FunctionType, types.BuiltinFunctionType]
ignoreRegex = re.compile('(method-wrapper|Flag|ItemChange|Option|Mode)')
if ignore is None:
ignore = {}
indent = ' '*depth
try:
hash(obj)
hsh = obj
except:
hsh = "%s:%d" % (str(type(obj)), id(obj))
if hsh in ignore:
return 0
ignore[hsh] = 1
try:
size = sys.getsizeof(obj)
except TypeError:
size = 0
if isinstance(obj, ndarray):
try:
size += len(obj.data)
except:
pass
if recursive:
if type(obj) in [list, tuple]:
if verbose:
print(indent+"list:")
for o in obj:
s = objectSize(o, ignore=ignore, verbose=verbose, depth=depth+1)
if verbose:
print(indent+' +', s)
size += s
elif isinstance(obj, dict):
if verbose:
print(indent+"list:")
for k in obj:
s = objectSize(obj[k], ignore=ignore, verbose=verbose, depth=depth+1)
if verbose:
print(indent+' +', k, s)
size += s
#elif isinstance(obj, QtCore.QObject):
#try:
#childs = obj.children()
#if verbose:
#print indent+"Qt children:"
#for ch in childs:
#s = objectSize(obj, ignore=ignore, verbose=verbose, depth=depth+1)
#size += s
#if verbose:
#print indent + ' +', ch.objectName(), s
#except:
#pass
#if isinstance(obj, types.InstanceType):
gc.collect()
if verbose:
print(indent+'attrs:')
for k in dir(obj):
if k in ['__dict__']:
continue
o = getattr(obj, k)
if type(o) in ignoreTypes:
continue
strtyp = str(type(o))
if ignoreRegex.search(strtyp):
continue
#if isinstance(o, types.ObjectType) and strtyp == "<type 'method-wrapper'>":
#continue
#if verbose:
#print indent, k, '?'
refs = [r for r in gc.get_referrers(o) if type(r) != types.FrameType]
if len(refs) == 1:
s = objectSize(o, ignore=ignore, verbose=verbose, depth=depth+1)
size += s
if verbose:
print(indent + " +", k, s)
#else:
#if verbose:
#print indent + ' -', k, len(refs)
return size
class GarbageWatcher(object):
"""
Convenient dictionary for holding weak references to objects.
Mainly used to check whether the objects have been collect yet or not.
Example:
gw = GarbageWatcher()
gw['objName'] = obj
gw['objName2'] = obj2
gw.check()
"""
def __init__(self):
self.objs = weakref.WeakValueDictionary()
self.allNames = []
def add(self, obj, name):
self.objs[name] = obj
self.allNames.append(name)
def __setitem__(self, name, obj):
self.add(obj, name)
def check(self):
"""Print a list of all watched objects and whether they have been collected."""
gc.collect()
dead = self.allNames[:]
alive = []
for k in self.objs:
dead.remove(k)
alive.append(k)
print("Deleted objects:", dead)
print("Live objects:", alive)
def __getitem__(self, item):
return self.objs[item]
class Profiler:
"""Simple profiler allowing measurement of multiple time intervals.
Arguments:
msg: message to print at start and finish of profiling
disabled: If true, profiler does nothing (so you can leave it in place)
delayed: If true, all messages are printed after call to finish()
(this can result in more accurate time step measurements)
globalDelay: if True, all nested profilers delay printing until the top level finishes
Example:
prof = Profiler('Function')
... do stuff ...
prof.mark('did stuff')
... do other stuff ...
prof.mark('did other stuff')
prof.finish()
"""
depth = 0
msgs = []
def __init__(self, msg="Profiler", disabled=False, delayed=True, globalDelay=True):
self.disabled = disabled
if disabled:
return
self.markCount = 0
self.finished = False
self.depth = Profiler.depth
Profiler.depth += 1
if not globalDelay:
self.msgs = []
self.delayed = delayed
self.msg = " "*self.depth + msg
msg2 = self.msg + " >>> Started"
if self.delayed:
self.msgs.append(msg2)
else:
print(msg2)
self.t0 = ptime.time()
self.t1 = self.t0
def mark(self, msg=None):
if self.disabled:
return
if msg is None:
msg = str(self.markCount)
self.markCount += 1
t1 = ptime.time()
msg2 = " "+self.msg+" "+msg+" "+"%gms" % ((t1-self.t1)*1000)
if self.delayed:
self.msgs.append(msg2)
else:
print(msg2)
self.t1 = ptime.time() ## don't measure time it took to print
def finish(self, msg=None):
if self.disabled or self.finished:
return
if msg is not None:
self.mark(msg)
t1 = ptime.time()
msg = self.msg + ' <<< Finished, total time: %gms' % ((t1-self.t0)*1000)
if self.delayed:
self.msgs.append(msg)
if self.depth == 0:
for line in self.msgs:
print(line)
Profiler.msgs = []
else:
print(msg)
Profiler.depth = self.depth
self.finished = True
def profile(code, name='profile_run', sort='cumulative', num=30):
"""Common-use for cProfile"""
cProfile.run(code, name)
stats = pstats.Stats(name)
stats.sort_stats(sort)
stats.print_stats(num)
return stats
#### Code for listing (nearly) all objects in the known universe
#### http://utcc.utoronto.ca/~cks/space/blog/python/GetAllObjects
# Recursively expand slist's objects
# into olist, using seen to track
# already processed objects.
def _getr(slist, olist, first=True):
i = 0
for e in slist:
oid = id(e)
typ = type(e)
if oid in olist or typ is int: ## or e in olist: ## since we're excluding all ints, there is no longer a need to check for olist keys
continue
olist[oid] = e
if first and (i%1000) == 0:
gc.collect()
tl = gc.get_referents(e)
if tl:
_getr(tl, olist, first=False)
i += 1
# The public function.
def get_all_objects():
"""Return a list of all live Python objects (excluding int and long), not including the list itself."""
gc.collect()
gcl = gc.get_objects()
olist = {}
_getr(gcl, olist)
del olist[id(olist)]
del olist[id(gcl)]
del olist[id(sys._getframe())]
return olist
def lookup(oid, objects=None):
"""Return an object given its ID, if it exists."""
if objects is None:
objects = get_all_objects()
return objects[oid]
class ObjTracker(object):
"""
Tracks all objects under the sun, reporting the changes between snapshots: what objects are created, deleted, and persistent.
This class is very useful for tracking memory leaks. The class goes to great (but not heroic) lengths to avoid tracking
its own internal objects.
Example:
ot = ObjTracker() # takes snapshot of currently existing objects
... do stuff ...
ot.diff() # prints lists of objects created and deleted since ot was initialized
... do stuff ...
ot.diff() # prints lists of objects created and deleted since last call to ot.diff()
# also prints list of items that were created since initialization AND have not been deleted yet
# (if done correctly, this list can tell you about objects that were leaked)
arrays = ot.findPersistent('ndarray') ## returns all objects matching 'ndarray' (string match, not instance checking)
## that were considered persistent when the last diff() was run
describeObj(arrays[0]) ## See if we can determine who has references to this array
"""
allObjs = {} ## keep track of all objects created and stored within class instances
allObjs[id(allObjs)] = None
def __init__(self):
self.startRefs = {} ## list of objects that exist when the tracker is initialized {oid: weakref}
## (If it is not possible to weakref the object, then the value is None)
self.startCount = {}
self.newRefs = {} ## list of objects that have been created since initialization
self.persistentRefs = {} ## list of objects considered 'persistent' when the last diff() was called
self.objTypes = {}
ObjTracker.allObjs[id(self)] = None
self.objs = [self.__dict__, self.startRefs, self.startCount, self.newRefs, self.persistentRefs, self.objTypes]
self.objs.append(self.objs)
for v in self.objs:
ObjTracker.allObjs[id(v)] = None
self.start()
def findNew(self, regex):
"""Return all objects matching regex that were considered 'new' when the last diff() was run."""
return self.findTypes(self.newRefs, regex)
def findPersistent(self, regex):
"""Return all objects matching regex that were considered 'persistent' when the last diff() was run."""
return self.findTypes(self.persistentRefs, regex)
def start(self):
"""
Remember the current set of objects as the comparison for all future calls to diff()
Called automatically on init, but can be called manually as well.
"""
refs, count, objs = self.collect()
for r in self.startRefs:
self.forgetRef(self.startRefs[r])
self.startRefs.clear()
self.startRefs.update(refs)
for r in refs:
self.rememberRef(r)
self.startCount.clear()
self.startCount.update(count)
#self.newRefs.clear()
#self.newRefs.update(refs)
def diff(self, **kargs):
"""
Compute all differences between the current object set and the reference set.
Print a set of reports for created, deleted, and persistent objects
"""
refs, count, objs = self.collect() ## refs contains the list of ALL objects
## Which refs have disappeared since call to start() (these are only displayed once, then forgotten.)
delRefs = {}
for i in self.startRefs.keys():
if i not in refs:
delRefs[i] = self.startRefs[i]
del self.startRefs[i]
self.forgetRef(delRefs[i])
for i in self.newRefs.keys():
if i not in refs:
delRefs[i] = self.newRefs[i]
del self.newRefs[i]
self.forgetRef(delRefs[i])
#print "deleted:", len(delRefs)
## Which refs have appeared since call to start() or diff()
persistentRefs = {} ## created since start(), but before last diff()
createRefs = {} ## created since last diff()
for o in refs:
if o not in self.startRefs:
if o not in self.newRefs:
createRefs[o] = refs[o] ## object has been created since last diff()
else:
persistentRefs[o] = refs[o] ## object has been created since start(), but before last diff() (persistent)
#print "new:", len(newRefs)
## self.newRefs holds the entire set of objects created since start()
for r in self.newRefs:
self.forgetRef(self.newRefs[r])
self.newRefs.clear()
self.newRefs.update(persistentRefs)
self.newRefs.update(createRefs)
for r in self.newRefs:
self.rememberRef(self.newRefs[r])
#print "created:", len(createRefs)
## self.persistentRefs holds all objects considered persistent.
self.persistentRefs.clear()
self.persistentRefs.update(persistentRefs)
print("----------- Count changes since start: ----------")
c1 = count.copy()
for k in self.startCount:
c1[k] = c1.get(k, 0) - self.startCount[k]
typs = list(c1.keys())
typs.sort(lambda a,b: cmp(c1[a], c1[b]))
for t in typs:
if c1[t] == 0:
continue
num = "%d" % c1[t]
print(" " + num + " "*(10-len(num)) + str(t))
print("----------- %d Deleted since last diff: ------------" % len(delRefs))
self.report(delRefs, objs, **kargs)
print("----------- %d Created since last diff: ------------" % len(createRefs))
self.report(createRefs, objs, **kargs)
print("----------- %d Created since start (persistent): ------------" % len(persistentRefs))
self.report(persistentRefs, objs, **kargs)
def __del__(self):
self.startRefs.clear()
self.startCount.clear()
self.newRefs.clear()
self.persistentRefs.clear()
del ObjTracker.allObjs[id(self)]
for v in self.objs:
del ObjTracker.allObjs[id(v)]
@classmethod
def isObjVar(cls, o):
return type(o) is cls or id(o) in cls.allObjs
def collect(self):
print("Collecting list of all objects...")
gc.collect()
objs = get_all_objects()
frame = sys._getframe()
del objs[id(frame)] ## ignore the current frame
del objs[id(frame.f_code)]
ignoreTypes = [int]
refs = {}
count = {}
for k in objs:
o = objs[k]
typ = type(o)
oid = id(o)
if ObjTracker.isObjVar(o) or typ in ignoreTypes:
continue
try:
ref = weakref.ref(obj)
except:
ref = None
refs[oid] = ref
typ = type(o)
typStr = typeStr(o)
self.objTypes[oid] = typStr
ObjTracker.allObjs[id(typStr)] = None
count[typ] = count.get(typ, 0) + 1
print("All objects: %d Tracked objects: %d" % (len(objs), len(refs)))
return refs, count, objs
def forgetRef(self, ref):
if ref is not None:
del ObjTracker.allObjs[id(ref)]
def rememberRef(self, ref):
## Record the address of the weakref object so it is not included in future object counts.
if ref is not None:
ObjTracker.allObjs[id(ref)] = None
def lookup(self, oid, ref, objs=None):
if ref is None or ref() is None:
try:
obj = lookup(oid, objects=objs)
except:
obj = None
else:
obj = ref()
return obj
def report(self, refs, allobjs=None, showIDs=False):
if allobjs is None:
allobjs = get_all_objects()
count = {}
rev = {}
for oid in refs:
obj = self.lookup(oid, refs[oid], allobjs)
if obj is None:
typ = "[del] " + self.objTypes[oid]
else:
typ = typeStr(obj)
if typ not in rev:
rev[typ] = []
rev[typ].append(oid)
c = count.get(typ, [0,0])
count[typ] = [c[0]+1, c[1]+objectSize(obj)]
typs = list(count.keys())
typs.sort(lambda a,b: cmp(count[a][1], count[b][1]))
for t in typs:
line = " %d\t%d\t%s" % (count[t][0], count[t][1], t)
if showIDs:
line += "\t"+",".join(map(str,rev[t]))
print(line)
def findTypes(self, refs, regex):
allObjs = get_all_objects()
ids = {}
objs = []
r = re.compile(regex)
for k in refs:
if r.search(self.objTypes[k]):
objs.append(self.lookup(k, refs[k], allObjs))
return objs
def describeObj(obj, depth=4, path=None, ignore=None):
"""
Trace all reference paths backward, printing a list of different ways this object can be accessed.
Attempts to answer the question "who has a reference to this object"
"""
if path is None:
path = [obj]
if ignore is None:
ignore = {} ## holds IDs of objects used within the function.
ignore[id(sys._getframe())] = None
ignore[id(path)] = None
gc.collect()
refs = gc.get_referrers(obj)
ignore[id(refs)] = None
printed=False
for ref in refs:
if id(ref) in ignore:
continue
if id(ref) in list(map(id, path)):
print("Cyclic reference: " + refPathString([ref]+path))
printed = True
continue
newPath = [ref]+path
if len(newPath) >= depth:
refStr = refPathString(newPath)
if '[_]' not in refStr: ## ignore '_' references generated by the interactive shell
print(refStr)
printed = True
else:
describeObj(ref, depth, newPath, ignore)
printed = True
if not printed:
print("Dead end: " + refPathString(path))
def typeStr(obj):
"""Create a more useful type string by making <instance> types report their class."""
typ = type(obj)
if typ == types.InstanceType:
return "<instance of %s>" % obj.__class__.__name__
else:
return str(typ)
def searchRefs(obj, *args):
"""Pseudo-interactive function for tracing references backward.
Arguments:
obj: The initial object from which to start searching
args: A set of string or int arguments.
each integer selects one of obj's referrers to be the new 'obj'
each string indicates an action to take on the current 'obj':
t: print the types of obj's referrers
l: print the lengths of obj's referrers (if they have __len__)
i: print the IDs of obj's referrers
o: print obj
ro: return obj
rr: return list of obj's referrers
Examples:
searchRefs(obj, 't') ## Print types of all objects referring to obj
searchRefs(obj, 't', 0, 't') ## ..then select the first referrer and print the types of its referrers
searchRefs(obj, 't', 0, 't', 'l') ## ..also print lengths of the last set of referrers
searchRefs(obj, 0, 1, 'ro') ## Select index 0 from obj's referrer, then select index 1 from the next set of referrers, then return that object
"""
ignore = {id(sys._getframe()): None}
gc.collect()
refs = gc.get_referrers(obj)
ignore[id(refs)] = None
refs = [r for r in refs if id(r) not in ignore]
for a in args:
#fo = allFrameObjs()
#refs = [r for r in refs if r not in fo]
if type(a) is int:
obj = refs[a]
gc.collect()
refs = gc.get_referrers(obj)
ignore[id(refs)] = None
refs = [r for r in refs if id(r) not in ignore]
elif a == 't':
print(list(map(typeStr, refs)))
elif a == 'i':
print(list(map(id, refs)))
elif a == 'l':
def slen(o):
if hasattr(o, '__len__'):
return len(o)
else:
return None
print(list(map(slen, refs)))
elif a == 'o':
print(obj)
elif a == 'ro':
return obj
elif a == 'rr':
return refs
def allFrameObjs():
"""Return list of frame objects in current stack. Useful if you want to ignore these objects in refernece searches"""
f = sys._getframe()
objs = []
while f is not None:
objs.append(f)
objs.append(f.f_code)
#objs.append(f.f_locals)
#objs.append(f.f_globals)
#objs.append(f.f_builtins)
f = f.f_back
return objs
def findObj(regex):
"""Return a list of objects whose typeStr matches regex"""
allObjs = get_all_objects()
objs = []
r = re.compile(regex)
for i in allObjs:
obj = allObjs[i]
if r.search(typeStr(obj)):
objs.append(obj)
return objs
def listRedundantModules():
"""List modules that have been imported more than once via different paths."""
mods = {}
for name, mod in sys.modules.items():
if not hasattr(mod, '__file__'):
continue
mfile = os.path.abspath(mod.__file__)
if mfile[-1] == 'c':
mfile = mfile[:-1]
if mfile in mods:
print("module at %s has 2 names: %s, %s" % (mfile, name, mods[mfile]))
else:
mods[mfile] = name
def walkQObjectTree(obj, counts=None, verbose=False, depth=0):
"""
Walk through a tree of QObjects, doing nothing to them.
The purpose of this function is to find dead objects and generate a crash
immediately rather than stumbling upon them later.
Prints a count of the objects encountered, for fun. (or is it?)
"""
if verbose:
print(" "*depth + typeStr(obj))
report = False
if counts is None:
counts = {}
report = True
typ = str(type(obj))
try:
counts[typ] += 1
except KeyError:
counts[typ] = 1
for child in obj.children():
walkQObjectTree(child, counts, verbose, depth+1)
return counts
QObjCache = {}
def qObjectReport(verbose=False):
"""Generate a report counting all QObjects and their types"""
global qObjCache
count = {}
for obj in findObj('PyQt'):
if isinstance(obj, QtCore.QObject):
oid = id(obj)
if oid not in QObjCache:
QObjCache[oid] = typeStr(obj) + " " + obj.objectName()
try:
QObjCache[oid] += " " + obj.parent().objectName()
QObjCache[oid] += " " + obj.text()
except:
pass
print("check obj", oid, str(QObjCache[oid]))
if obj.parent() is None:
walkQObjectTree(obj, count, verbose)
typs = list(count.keys())
typs.sort()
for t in typs:
print(count[t], "\t", t)
class PrintDetector(object):
def __init__(self):
self.stdout = sys.stdout
sys.stdout = self
def remove(self):
sys.stdout = self.stdout
def __del__(self):
self.remove()
def write(self, x):
self.stdout.write(x)
traceback.print_stack()
def flush(self):
self.stdout.flush()
|