def _genops(data, yield_end_pos=False):
if isinstance(data, bytes_types):
data = io.BytesIO(data)
if hasattr(data, "tell"):
getpos = data.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = data.read(1)
opcode = code2op.get(code.decode("latin-1"))
if opcode is None:
if code == b"":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
"<unknown>" if pos is None else pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(data)
if yield_end_pos:
yield opcode, arg, pos, getpos()
else:
yield opcode, arg, pos
if code == b'.':
assert opcode.name == 'STOP'
break
python类tell()的实例源码
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a bytes object,
it's wrapped in a BytesIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
return _genops(pickle)
##############################################################################
# A pickle optimizer.
def _genops(data, yield_end_pos=False):
if isinstance(data, bytes_types):
data = io.BytesIO(data)
if hasattr(data, "tell"):
getpos = data.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = data.read(1)
opcode = code2op.get(code.decode("latin-1"))
if opcode is None:
if code == b"":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
"<unknown>" if pos is None else pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(data)
if yield_end_pos:
yield opcode, arg, pos, getpos()
else:
yield opcode, arg, pos
if code == b'.':
assert opcode.name == 'STOP'
break
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a bytes object,
it's wrapped in a BytesIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
return _genops(pickle)
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a bytes object,
it's wrapped in a BytesIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
if isinstance(pickle, bytes_types):
import io
pickle = io.BytesIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code.decode("latin-1"))
if opcode is None:
if code == b"":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == b'.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
def genops(pickle):
"""Generate all the opcodes in a pickle.
'pickle' is a file-like object, or string, containing the pickle.
Each opcode in the pickle is generated, from the current pickle position,
stopping after a STOP opcode is delivered. A triple is generated for
each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a string object,
it's wrapped in a StringIO object, and the latter's tell() result is
used. Else (the pickle doesn't have a tell(), and it's not obvious how
to query its current position) pos is None.
"""
import cStringIO as StringIO
if isinstance(pickle, str):
pickle = StringIO.StringIO(pickle)
if hasattr(pickle, "tell"):
getpos = pickle.tell
else:
getpos = lambda: None
while True:
pos = getpos()
code = pickle.read(1)
opcode = code2op.get(code)
if opcode is None:
if code == "":
raise ValueError("pickle exhausted before seeing STOP")
else:
raise ValueError("at position %s, opcode %r unknown" % (
pos is None and "<unknown>" or pos,
code))
if opcode.arg is None:
arg = None
else:
arg = opcode.arg.reader(pickle)
yield opcode, arg, pos
if code == '.':
assert opcode.name == 'STOP'
break
##############################################################################
# A pickle optimizer.
