def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringI
return len(o.getvalue())
python类UnsupportedOperation()的实例源码
def chunks(self, chunk_size=None):
"""
Read the file and yield chunks of ``chunk_size`` bytes (defaults to
``UploadedFile.DEFAULT_CHUNK_SIZE``).
"""
if not chunk_size:
chunk_size = self.DEFAULT_CHUNK_SIZE
try:
self.seek(0)
except (AttributeError, UnsupportedOperation):
pass
while True:
data = self.read(chunk_size)
if not data:
break
yield data
def chunks(self, chunk_size=None):
"""
Read the file and yield chunks of ``chunk_size`` bytes (defaults to
``UploadedFile.DEFAULT_CHUNK_SIZE``).
"""
if not chunk_size:
chunk_size = self.DEFAULT_CHUNK_SIZE
try:
self.seek(0)
except (AttributeError, UnsupportedOperation):
pass
while True:
data = self.read(chunk_size)
if not data:
break
yield data
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def _is_daemon():
# The process group for a foreground process will match the
# process group of the controlling terminal. If those values do
# not match, or ioctl() fails on the stdout file handle, we assume
# the process is running in the background as a daemon.
# http://www.gnu.org/software/bash/manual/bashref.html#Job-Control-Basics
try:
is_daemon = os.getpgrp() != os.tcgetpgrp(sys.stdout.fileno())
except io.UnsupportedOperation:
# Could not get the fileno for stdout, so we must be a daemon.
is_daemon = True
except OSError as err:
if err.errno == errno.ENOTTY:
# Assume we are a daemon because there is no terminal.
is_daemon = True
else:
raise
return is_daemon
def chunks(self, chunk_size=None):
"""
Read the file and yield chunks of ``chunk_size`` bytes (defaults to
``UploadedFile.DEFAULT_CHUNK_SIZE``).
"""
if not chunk_size:
chunk_size = self.DEFAULT_CHUNK_SIZE
try:
self.seek(0)
except (AttributeError, UnsupportedOperation):
pass
while True:
data = self.read(chunk_size)
if not data:
break
yield data
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def chunks(self, chunk_size=None):
"""
Read the file and yield chunks of ``chunk_size`` bytes (defaults to
``UploadedFile.DEFAULT_CHUNK_SIZE``).
"""
if not chunk_size:
chunk_size = self.DEFAULT_CHUNK_SIZE
try:
self.seek(0)
except (AttributeError, UnsupportedOperation):
pass
while True:
data = self.read(chunk_size)
if not data:
break
yield data
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringI
return len(o.getvalue())
def total_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def total_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def __init__(self, stdin=None):
self.stdin = stdin or sys.stdin
# The input object should be a TTY.
assert self.stdin.isatty()
# Test whether the given input object has a file descriptor.
# (Idle reports stdin to be a TTY, but fileno() is not implemented.)
try:
# This should not raise, but can return 0.
self.stdin.fileno()
except io.UnsupportedOperation:
if 'idlelib.run' in sys.modules:
raise io.UnsupportedOperation(
'Stdin is not a terminal. Running from Idle is not supported.')
else:
raise io.UnsupportedOperation('Stdin is not a terminal.')
def __init__(self, stdin=None):
self.stdin = stdin or sys.stdin
# The input object should be a TTY.
assert self.stdin.isatty()
# Test whether the given input object has a file descriptor.
# (Idle reports stdin to be a TTY, but fileno() is not implemented.)
try:
# This should not raise, but can return 0.
self.stdin.fileno()
except io.UnsupportedOperation:
if 'idlelib.run' in sys.modules:
raise io.UnsupportedOperation(
'Stdin is not a terminal. Running from Idle is not supported.')
else:
raise io.UnsupportedOperation('Stdin is not a terminal.')
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringI
return len(o.getvalue())
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
def chunks(self, chunk_size=None):
"""
Read the file and yield chunks of ``chunk_size`` bytes (defaults to
``UploadedFile.DEFAULT_CHUNK_SIZE``).
"""
if not chunk_size:
chunk_size = self.DEFAULT_CHUNK_SIZE
try:
self.seek(0)
except (AttributeError, UnsupportedOperation):
pass
while True:
data = self.read(chunk_size)
if not data:
break
yield data
def super_len(o):
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringI
return len(o.getvalue())
def deal_with_empty_file_stream(data):
"""???????????0???????????"""
if hasattr(data, 'fileno') and hasattr(data, 'tell'):
try:
fileno = data.fileno()
total_length = os.fstat(fileno).st_size
current_position = data.tell()
if total_length - current_position == 0:
return ""
except io.UnsupportedOperation:
return ""
return data
def super_len(o):
total_length = 0
current_position = 0
if hasattr(o, '__len__'):
total_length = len(o)
elif hasattr(o, 'len'):
total_length = o.len
elif hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
total_length = len(o.getvalue())
elif hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
total_length = os.fstat(fileno).st_size
# Having used fstat to determine the file length, we need to
# confirm that this file was opened up in binary mode.
if 'b' not in o.mode:
warnings.warn((
"Requests has determined the content-length for this "
"request using the binary size of the file: however, the "
"file has been opened in text mode (i.e. without the 'b' "
"flag in the mode). This may lead to an incorrect "
"content-length. In Requests 3.0, support will be removed "
"for files in text mode."),
FileModeWarning
)
if hasattr(o, 'tell'):
current_position = o.tell()
return max(0, total_length - current_position)
def super_len(o):
total_length = 0
current_position = 0
if hasattr(o, '__len__'):
total_length = len(o)
elif hasattr(o, 'len'):
total_length = o.len
elif hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
total_length = len(o.getvalue())
elif hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
total_length = os.fstat(fileno).st_size
# Having used fstat to determine the file length, we need to
# confirm that this file was opened up in binary mode.
if 'b' not in o.mode:
warnings.warn((
"Requests has determined the content-length for this "
"request using the binary size of the file: however, the "
"file has been opened in text mode (i.e. without the 'b' "
"flag in the mode). This may lead to an incorrect "
"content-length. In Requests 3.0, support will be removed "
"for files in text mode."),
FileModeWarning
)
if hasattr(o, 'tell'):
current_position = o.tell()
return max(0, total_length - current_position)
def super_len(o):
total_length = 0
current_position = 0
if hasattr(o, '__len__'):
total_length = len(o)
elif hasattr(o, 'len'):
total_length = o.len
elif hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
total_length = len(o.getvalue())
elif hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
total_length = os.fstat(fileno).st_size
# Having used fstat to determine the file length, we need to
# confirm that this file was opened up in binary mode.
if 'b' not in o.mode:
warnings.warn((
"Requests has determined the content-length for this "
"request using the binary size of the file: however, the "
"file has been opened in text mode (i.e. without the 'b' "
"flag in the mode). This may lead to an incorrect "
"content-length. In Requests 3.0, support will be removed "
"for files in text mode."),
FileModeWarning
)
if hasattr(o, 'tell'):
current_position = o.tell()
return max(0, total_length - current_position)
def seek(self, position: int, whence: int = 0) -> None:
"""
Seek the file at the given position.
.. note:: The :exc:`io.UnsupportedOperation` will be raised if the underlying file-object is not
:meth:`.seekable`.
:param position: the position to seek on.
:param whence: optional whence argument.
"""
raise NotImplementedError('Seek operation is not supported by this object: %r' % self) # pragma: no cover
def read(self, size=None):
raise io.UnsupportedOperation('read')
def readinto(self, buf):
raise io.UnsupportedOperation('readinto')
def super_len(o):
total_length = 0
current_position = 0
if hasattr(o, '__len__'):
total_length = len(o)
elif hasattr(o, 'len'):
total_length = o.len
elif hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
total_length = len(o.getvalue())
elif hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
total_length = os.fstat(fileno).st_size
# Having used fstat to determine the file length, we need to
# confirm that this file was opened up in binary mode.
if 'b' not in o.mode:
warnings.warn((
"Requests has determined the content-length for this "
"request using the binary size of the file: however, the "
"file has been opened in text mode (i.e. without the 'b' "
"flag in the mode). This may lead to an incorrect "
"content-length. In Requests 3.0, support will be removed "
"for files in text mode."),
FileModeWarning
)
if hasattr(o, 'tell'):
current_position = o.tell()
return max(0, total_length - current_position)
def total_len(o):
# Stolen from requests_toolbelt and modified
if hasattr(o, '__len__'):
return len(o)
if hasattr(o, 'len'):
return o.len
if hasattr(o, 'fileno'):
try:
fileno = o.fileno()
except io.UnsupportedOperation:
pass
else:
return os.fstat(fileno).st_size
if hasattr(o, 'getvalue'):
# e.g. BytesIO, cStringIO.StringIO
return len(o.getvalue())
try:
current_pos = o.tell()
length = o.seek(0, 2)
o.seek(current_pos, 0)
return length
except IOError:
pass
