--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/eggs/py-1.4.0-py2.6.egg/py/_code/code.py Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,722 @@
+import py
+import sys, os.path
+
+builtin_repr = repr
+
+reprlib = py.builtin._tryimport('repr', 'reprlib')
+
+class Code(object):
+ """ wrapper around Python code objects """
+ def __init__(self, rawcode):
+ rawcode = py.code.getrawcode(rawcode)
+ self.raw = rawcode
+ try:
+ self.filename = rawcode.co_filename
+ self.firstlineno = rawcode.co_firstlineno - 1
+ self.name = rawcode.co_name
+ except AttributeError:
+ raise TypeError("not a code object: %r" %(rawcode,))
+
+ def __eq__(self, other):
+ return self.raw == other.raw
+
+ def __ne__(self, other):
+ return not self == other
+
+ def path(self):
+ """ return a path object pointing to source code"""
+ p = py.path.local(self.raw.co_filename)
+ if not p.check():
+ # XXX maybe try harder like the weird logic
+ # in the standard lib [linecache.updatecache] does?
+ p = self.raw.co_filename
+ return p
+
+ path = property(path, None, None, "path of this code object")
+
+ def fullsource(self):
+ """ return a py.code.Source object for the full source file of the code
+ """
+ from py._code import source
+ full, _ = source.findsource(self.raw)
+ return full
+ fullsource = property(fullsource, None, None,
+ "full source containing this code object")
+
+ def source(self):
+ """ return a py.code.Source object for the code object's source only
+ """
+ # return source only for that part of code
+ return py.code.Source(self.raw)
+
+ def getargs(self):
+ """ return a tuple with the argument names for the code object
+ """
+ # handfull shortcut for getting args
+ raw = self.raw
+ return raw.co_varnames[:raw.co_argcount]
+
+class Frame(object):
+ """Wrapper around a Python frame holding f_locals and f_globals
+ in which expressions can be evaluated."""
+
+ def __init__(self, frame):
+ self.code = py.code.Code(frame.f_code)
+ self.lineno = frame.f_lineno - 1
+ self.f_globals = frame.f_globals
+ self.f_locals = frame.f_locals
+ self.raw = frame
+
+ def statement(self):
+ if self.code.fullsource is None:
+ return py.code.Source("")
+ return self.code.fullsource.getstatement(self.lineno)
+ statement = property(statement, None, None,
+ "statement this frame is at")
+
+ def eval(self, code, **vars):
+ """ evaluate 'code' in the frame
+
+ 'vars' are optional additional local variables
+
+ returns the result of the evaluation
+ """
+ f_locals = self.f_locals.copy()
+ f_locals.update(vars)
+ return eval(code, self.f_globals, f_locals)
+
+ def exec_(self, code, **vars):
+ """ exec 'code' in the frame
+
+ 'vars' are optiona; additional local variables
+ """
+ f_locals = self.f_locals.copy()
+ f_locals.update(vars)
+ py.builtin.exec_(code, self.f_globals, f_locals )
+
+ def repr(self, object):
+ """ return a 'safe' (non-recursive, one-line) string repr for 'object'
+ """
+ return py.io.saferepr(object)
+
+ def is_true(self, object):
+ return object
+
+ def getargs(self):
+ """ return a list of tuples (name, value) for all arguments
+ """
+ retval = []
+ for arg in self.code.getargs():
+ try:
+ retval.append((arg, self.f_locals[arg]))
+ except KeyError:
+ pass # this can occur when using Psyco
+ return retval
+
+class TracebackEntry(object):
+ """ a single entry in a traceback """
+
+ exprinfo = None
+
+ def __init__(self, rawentry):
+ self._rawentry = rawentry
+ self.frame = py.code.Frame(rawentry.tb_frame)
+ # Ugh. 2.4 and 2.5 differs here when encountering
+ # multi-line statements. Not sure about the solution, but
+ # should be portable
+ self.lineno = rawentry.tb_lineno - 1
+ self.relline = self.lineno - self.frame.code.firstlineno
+
+ def __repr__(self):
+ return "<TracebackEntry %s:%d>" %(self.frame.code.path, self.lineno+1)
+
+ def statement(self):
+ """ return a py.code.Source object for the current statement """
+ source = self.frame.code.fullsource
+ return source.getstatement(self.lineno)
+ statement = property(statement, None, None,
+ "statement of this traceback entry.")
+
+ def path(self):
+ return self.frame.code.path
+ path = property(path, None, None, "path to the full source code")
+
+ def getlocals(self):
+ return self.frame.f_locals
+ locals = property(getlocals, None, None, "locals of underlaying frame")
+
+ def reinterpret(self):
+ """Reinterpret the failing statement and returns a detailed information
+ about what operations are performed."""
+ if self.exprinfo is None:
+ source = str(self.statement).strip()
+ x = py.code._reinterpret(source, self.frame, should_fail=True)
+ if not isinstance(x, str):
+ raise TypeError("interpret returned non-string %r" % (x,))
+ self.exprinfo = x
+ return self.exprinfo
+
+ def getfirstlinesource(self):
+ # on Jython this firstlineno can be -1 apparently
+ return max(self.frame.code.firstlineno, 0)
+
+ def getsource(self):
+ """ return failing source code. """
+ source = self.frame.code.fullsource
+ if source is None:
+ return None
+ start = self.getfirstlinesource()
+ end = self.lineno
+ try:
+ _, end = source.getstatementrange(end)
+ except IndexError:
+ end = self.lineno + 1
+ # heuristic to stop displaying source on e.g.
+ # if something: # assume this causes a NameError
+ # # _this_ lines and the one
+ # below we don't want from entry.getsource()
+ for i in range(self.lineno, end):
+ if source[i].rstrip().endswith(':'):
+ end = i + 1
+ break
+ return source[start:end]
+ source = property(getsource)
+
+ def ishidden(self):
+ """ return True if the current frame has a var __tracebackhide__
+ resolving to True
+
+ mostly for internal use
+ """
+ try:
+ return self.frame.eval("__tracebackhide__")
+ except py.builtin._sysex:
+ raise
+ except:
+ return False
+
+ def __str__(self):
+ try:
+ fn = str(self.path)
+ except py.error.Error:
+ fn = '???'
+ name = self.frame.code.name
+ try:
+ line = str(self.statement).lstrip()
+ except KeyboardInterrupt:
+ raise
+ except:
+ line = "???"
+ return " File %r:%d in %s\n %s\n" %(fn, self.lineno+1, name, line)
+
+ def name(self):
+ return self.frame.code.raw.co_name
+ name = property(name, None, None, "co_name of underlaying code")
+
+class Traceback(list):
+ """ Traceback objects encapsulate and offer higher level
+ access to Traceback entries.
+ """
+ Entry = TracebackEntry
+ def __init__(self, tb):
+ """ initialize from given python traceback object. """
+ if hasattr(tb, 'tb_next'):
+ def f(cur):
+ while cur is not None:
+ yield self.Entry(cur)
+ cur = cur.tb_next
+ list.__init__(self, f(tb))
+ else:
+ list.__init__(self, tb)
+
+ def cut(self, path=None, lineno=None, firstlineno=None, excludepath=None):
+ """ return a Traceback instance wrapping part of this Traceback
+
+ by provding any combination of path, lineno and firstlineno, the
+ first frame to start the to-be-returned traceback is determined
+
+ this allows cutting the first part of a Traceback instance e.g.
+ for formatting reasons (removing some uninteresting bits that deal
+ with handling of the exception/traceback)
+ """
+ for x in self:
+ code = x.frame.code
+ codepath = code.path
+ if ((path is None or codepath == path) and
+ (excludepath is None or not hasattr(codepath, 'relto') or
+ not codepath.relto(excludepath)) and
+ (lineno is None or x.lineno == lineno) and
+ (firstlineno is None or x.frame.code.firstlineno == firstlineno)):
+ return Traceback(x._rawentry)
+ return self
+
+ def __getitem__(self, key):
+ val = super(Traceback, self).__getitem__(key)
+ if isinstance(key, type(slice(0))):
+ val = self.__class__(val)
+ return val
+
+ def filter(self, fn=lambda x: not x.ishidden()):
+ """ return a Traceback instance with certain items removed
+
+ fn is a function that gets a single argument, a TracebackItem
+ instance, and should return True when the item should be added
+ to the Traceback, False when not
+
+ by default this removes all the TracebackItems which are hidden
+ (see ishidden() above)
+ """
+ return Traceback(filter(fn, self))
+
+ def getcrashentry(self):
+ """ return last non-hidden traceback entry that lead
+ to the exception of a traceback.
+ """
+ tb = self.filter()
+ if not tb:
+ tb = self
+ return tb[-1]
+
+ def recursionindex(self):
+ """ return the index of the frame/TracebackItem where recursion
+ originates if appropriate, None if no recursion occurred
+ """
+ cache = {}
+ for i, entry in enumerate(self):
+ key = entry.frame.code.path, entry.lineno
+ #print "checking for recursion at", key
+ l = cache.setdefault(key, [])
+ if l:
+ f = entry.frame
+ loc = f.f_locals
+ for otherloc in l:
+ if f.is_true(f.eval(co_equal,
+ __recursioncache_locals_1=loc,
+ __recursioncache_locals_2=otherloc)):
+ return i
+ l.append(entry.frame.f_locals)
+ return None
+
+co_equal = compile('__recursioncache_locals_1 == __recursioncache_locals_2',
+ '?', 'eval')
+
+class ExceptionInfo(object):
+ """ wraps sys.exc_info() objects and offers
+ help for navigating the traceback.
+ """
+ _striptext = ''
+ def __init__(self, tup=None, exprinfo=None):
+ # NB. all attributes are private! Subclasses or other
+ # ExceptionInfo-like classes may have different attributes.
+ if tup is None:
+ tup = sys.exc_info()
+ if exprinfo is None and isinstance(tup[1], py.code._AssertionError):
+ exprinfo = getattr(tup[1], 'msg', None)
+ if exprinfo is None:
+ exprinfo = str(tup[1])
+ if exprinfo and exprinfo.startswith('assert '):
+ self._striptext = 'AssertionError: '
+ self._excinfo = tup
+ self.type, self.value, tb = self._excinfo
+ self.typename = self.type.__name__
+ self.traceback = py.code.Traceback(tb)
+
+ def __repr__(self):
+ return "<ExceptionInfo %s tblen=%d>" % (self.typename, len(self.traceback))
+
+ def exconly(self, tryshort=False):
+ """ return the exception as a string
+
+ when 'tryshort' resolves to True, and the exception is a
+ py.code._AssertionError, only the actual exception part of
+ the exception representation is returned (so 'AssertionError: ' is
+ removed from the beginning)
+ """
+ lines = py.std.traceback.format_exception_only(self.type, self.value)
+ text = ''.join(lines)
+ text = text.rstrip()
+ if tryshort:
+ if text.startswith(self._striptext):
+ text = text[len(self._striptext):]
+ return text
+
+ def errisinstance(self, exc):
+ """ return True if the exception is an instance of exc """
+ return isinstance(self.value, exc)
+
+ def _getreprcrash(self):
+ exconly = self.exconly(tryshort=True)
+ entry = self.traceback.getcrashentry()
+ path, lineno = entry.path, entry.lineno
+ reprcrash = ReprFileLocation(path, lineno+1, exconly)
+ return reprcrash
+
+ def getrepr(self, showlocals=False, style="long",
+ abspath=False, tbfilter=True, funcargs=False):
+ """ return str()able representation of this exception info.
+ showlocals: show locals per traceback entry
+ style: long|short|no|native traceback style
+ tbfilter: hide entries (where __tracebackhide__ is true)
+ """
+ if style == 'native':
+ import traceback
+ return ''.join(traceback.format_exception(
+ self.type,
+ self.value,
+ self.traceback[0]._rawentry,
+ ))
+
+ fmt = FormattedExcinfo(showlocals=showlocals, style=style,
+ abspath=abspath, tbfilter=tbfilter, funcargs=funcargs)
+ return fmt.repr_excinfo(self)
+
+ def __str__(self):
+ entry = self.traceback[-1]
+ loc = ReprFileLocation(entry.path, entry.lineno + 1, self.exconly())
+ return str(loc)
+
+ def __unicode__(self):
+ entry = self.traceback[-1]
+ loc = ReprFileLocation(entry.path, entry.lineno + 1, self.exconly())
+ return unicode(loc)
+
+
+class FormattedExcinfo(object):
+ """ presenting information about failing Functions and Generators. """
+ # for traceback entries
+ flow_marker = ">"
+ fail_marker = "E"
+
+ def __init__(self, showlocals=False, style="long", abspath=True, tbfilter=True, funcargs=False):
+ self.showlocals = showlocals
+ self.style = style
+ self.tbfilter = tbfilter
+ self.funcargs = funcargs
+ self.abspath = abspath
+
+ def _getindent(self, source):
+ # figure out indent for given source
+ try:
+ s = str(source.getstatement(len(source)-1))
+ except KeyboardInterrupt:
+ raise
+ except:
+ try:
+ s = str(source[-1])
+ except KeyboardInterrupt:
+ raise
+ except:
+ return 0
+ return 4 + (len(s) - len(s.lstrip()))
+
+ def _getentrysource(self, entry):
+ source = entry.getsource()
+ if source is not None:
+ source = source.deindent()
+ return source
+
+ def _saferepr(self, obj):
+ return py.io.saferepr(obj)
+
+ def repr_args(self, entry):
+ if self.funcargs:
+ args = []
+ for argname, argvalue in entry.frame.getargs():
+ args.append((argname, self._saferepr(argvalue)))
+ return ReprFuncArgs(args)
+
+ def get_source(self, source, line_index=-1, excinfo=None, short=False):
+ """ return formatted and marked up source lines. """
+ lines = []
+ if source is None:
+ source = py.code.Source("???")
+ line_index = 0
+ if line_index < 0:
+ line_index += len(source)
+ for i in range(len(source)):
+ if i == line_index:
+ prefix = self.flow_marker + " "
+ else:
+ if short:
+ continue
+ prefix = " "
+ line = prefix + source[i]
+ lines.append(line)
+ if excinfo is not None:
+ indent = self._getindent(source)
+ lines.extend(self.get_exconly(excinfo, indent=indent, markall=True))
+ return lines
+
+ def get_exconly(self, excinfo, indent=4, markall=False):
+ lines = []
+ indent = " " * indent
+ # get the real exception information out
+ exlines = excinfo.exconly(tryshort=True).split('\n')
+ failindent = self.fail_marker + indent[1:]
+ for line in exlines:
+ lines.append(failindent + line)
+ if not markall:
+ failindent = indent
+ return lines
+
+ def repr_locals(self, locals):
+ if self.showlocals:
+ lines = []
+ keys = list(locals)
+ keys.sort()
+ for name in keys:
+ value = locals[name]
+ if name == '__builtins__':
+ lines.append("__builtins__ = <builtins>")
+ else:
+ # This formatting could all be handled by the
+ # _repr() function, which is only reprlib.Repr in
+ # disguise, so is very configurable.
+ str_repr = self._saferepr(value)
+ #if len(str_repr) < 70 or not isinstance(value,
+ # (list, tuple, dict)):
+ lines.append("%-10s = %s" %(name, str_repr))
+ #else:
+ # self._line("%-10s =\\" % (name,))
+ # # XXX
+ # py.std.pprint.pprint(value, stream=self.excinfowriter)
+ return ReprLocals(lines)
+
+ def repr_traceback_entry(self, entry, excinfo=None):
+ # excinfo is not None if this is the last tb entry
+ source = self._getentrysource(entry)
+ if source is None:
+ source = py.code.Source("???")
+ line_index = 0
+ else:
+ # entry.getfirstlinesource() can be -1, should be 0 on jython
+ line_index = entry.lineno - max(entry.getfirstlinesource(), 0)
+
+ lines = []
+ if self.style in ("short", "long"):
+ short = self.style == "short"
+ reprargs = None
+ if not short:
+ reprargs = self.repr_args(entry)
+ s = self.get_source(source, line_index, excinfo, short=short)
+ lines.extend(s)
+ if short:
+ message = "in %s" %(entry.name)
+ else:
+ message = excinfo and excinfo.typename or ""
+ path = self._makepath(entry.path)
+ filelocrepr = ReprFileLocation(path, entry.lineno+1, message)
+ localsrepr = None
+ if not short:
+ localsrepr = self.repr_locals(entry.locals)
+ return ReprEntry(lines, reprargs, localsrepr, filelocrepr, short)
+ if excinfo:
+ lines.extend(self.get_exconly(excinfo, indent=4))
+ return ReprEntry(lines, None, None, None, False)
+
+ def _makepath(self, path):
+ if not self.abspath:
+ np = py.path.local().bestrelpath(path)
+ if len(np) < len(str(path)):
+ path = np
+ return path
+
+ def repr_traceback(self, excinfo):
+ traceback = excinfo.traceback
+ if self.tbfilter:
+ traceback = traceback.filter()
+ recursionindex = None
+ if excinfo.errisinstance(RuntimeError):
+ recursionindex = traceback.recursionindex()
+ last = traceback[-1]
+ entries = []
+ extraline = None
+ for index, entry in enumerate(traceback):
+ einfo = (last == entry) and excinfo or None
+ reprentry = self.repr_traceback_entry(entry, einfo)
+ entries.append(reprentry)
+ if index == recursionindex:
+ extraline = "!!! Recursion detected (same locals & position)"
+ break
+ return ReprTraceback(entries, extraline, style=self.style)
+
+ def repr_excinfo(self, excinfo):
+ reprtraceback = self.repr_traceback(excinfo)
+ reprcrash = excinfo._getreprcrash()
+ return ReprExceptionInfo(reprtraceback, reprcrash)
+
+class TerminalRepr:
+ def __str__(self):
+ s = self.__unicode__()
+ if sys.version_info[0] < 3:
+ s = s.encode('utf-8')
+ return s
+
+ def __unicode__(self):
+ l = []
+ tw = py.io.TerminalWriter(l.append)
+ self.toterminal(tw)
+ l = map(unicode_or_repr, l)
+ return "".join(l).strip()
+
+ def __repr__(self):
+ return "<%s instance at %0x>" %(self.__class__, id(self))
+
+def unicode_or_repr(obj):
+ try:
+ return py.builtin._totext(obj)
+ except KeyboardInterrupt:
+ raise
+ except Exception:
+ return "<print-error: %r>" % py.io.saferepr(obj)
+
+class ReprExceptionInfo(TerminalRepr):
+ def __init__(self, reprtraceback, reprcrash):
+ self.reprtraceback = reprtraceback
+ self.reprcrash = reprcrash
+ self.sections = []
+
+ def addsection(self, name, content, sep="-"):
+ self.sections.append((name, content, sep))
+
+ def toterminal(self, tw):
+ self.reprtraceback.toterminal(tw)
+ for name, content, sep in self.sections:
+ tw.sep(sep, name)
+ tw.line(content)
+
+class ReprTraceback(TerminalRepr):
+ entrysep = "_ "
+
+ def __init__(self, reprentries, extraline, style):
+ self.reprentries = reprentries
+ self.extraline = extraline
+ self.style = style
+
+ def toterminal(self, tw):
+ sepok = False
+ for entry in self.reprentries:
+ if self.style == "long":
+ if sepok:
+ tw.sep(self.entrysep)
+ tw.line("")
+ sepok = True
+ entry.toterminal(tw)
+ if self.extraline:
+ tw.line(self.extraline)
+
+class ReprEntry(TerminalRepr):
+ localssep = "_ "
+
+ def __init__(self, lines, reprfuncargs, reprlocals, filelocrepr, short):
+ self.lines = lines
+ self.reprfuncargs = reprfuncargs
+ self.reprlocals = reprlocals
+ self.reprfileloc = filelocrepr
+ self.short = short
+
+ def toterminal(self, tw):
+ if self.short:
+ self.reprfileloc.toterminal(tw)
+ for line in self.lines:
+ red = line.startswith("E ")
+ tw.line(line, bold=True, red=red)
+ #tw.line("")
+ return
+ if self.reprfuncargs:
+ self.reprfuncargs.toterminal(tw)
+ for line in self.lines:
+ red = line.startswith("E ")
+ tw.line(line, bold=True, red=red)
+ if self.reprlocals:
+ #tw.sep(self.localssep, "Locals")
+ tw.line("")
+ self.reprlocals.toterminal(tw)
+ if self.reprfileloc:
+ tw.line("")
+ self.reprfileloc.toterminal(tw)
+
+ def __str__(self):
+ return "%s\n%s\n%s" % ("\n".join(self.lines),
+ self.reprlocals,
+ self.reprfileloc)
+
+class ReprFileLocation(TerminalRepr):
+ def __init__(self, path, lineno, message):
+ self.path = str(path)
+ self.lineno = lineno
+ self.message = message
+
+ def toterminal(self, tw):
+ # filename and lineno output for each entry,
+ # using an output format that most editors unterstand
+ msg = self.message
+ i = msg.find("\n")
+ if i != -1:
+ msg = msg[:i]
+ tw.line("%s:%s: %s" %(self.path, self.lineno, msg))
+
+class ReprLocals(TerminalRepr):
+ def __init__(self, lines):
+ self.lines = lines
+
+ def toterminal(self, tw):
+ for line in self.lines:
+ tw.line(line)
+
+class ReprFuncArgs(TerminalRepr):
+ def __init__(self, args):
+ self.args = args
+
+ def toterminal(self, tw):
+ if self.args:
+ linesofar = ""
+ for name, value in self.args:
+ ns = "%s = %s" %(name, value)
+ if len(ns) + len(linesofar) + 2 > tw.fullwidth:
+ if linesofar:
+ tw.line(linesofar)
+ linesofar = ns
+ else:
+ if linesofar:
+ linesofar += ", " + ns
+ else:
+ linesofar = ns
+ if linesofar:
+ tw.line(linesofar)
+ tw.line("")
+
+
+
+oldbuiltins = {}
+
+def patch_builtins(assertion=True, compile=True):
+ """ put compile and AssertionError builtins to Python's builtins. """
+ if assertion:
+ from py._code import assertion
+ l = oldbuiltins.setdefault('AssertionError', [])
+ l.append(py.builtin.builtins.AssertionError)
+ py.builtin.builtins.AssertionError = assertion.AssertionError
+ if compile:
+ l = oldbuiltins.setdefault('compile', [])
+ l.append(py.builtin.builtins.compile)
+ py.builtin.builtins.compile = py.code.compile
+
+def unpatch_builtins(assertion=True, compile=True):
+ """ remove compile and AssertionError builtins from Python builtins. """
+ if assertion:
+ py.builtin.builtins.AssertionError = oldbuiltins['AssertionError'].pop()
+ if compile:
+ py.builtin.builtins.compile = oldbuiltins['compile'].pop()
+
+def getrawcode(obj):
+ """ return code object for given function. """
+ try:
+ return obj.__code__
+ except AttributeError:
+ obj = getattr(obj, 'im_func', obj)
+ obj = getattr(obj, 'func_code', obj)
+ obj = getattr(obj, 'f_code', obj)
+ obj = getattr(obj, '__code__', obj)
+ return obj
+