本文整理汇总了Python中gevent.fileobject.FileObject.read方法的典型用法代码示例。如果您正苦于以下问题：Python FileObject.read方法的具体用法？Python FileObject.read怎么用？Python FileObject.read使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类gevent.fileobject.FileObject的用法示例。
在下文中一共展示了FileObject.read方法的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_bufsize_0
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
def test_bufsize_0(self):
# Issue #840
r, w = os.pipe()
x = FileObject(r, 'rb', bufsize=0)
y = FileObject(w, 'wb', bufsize=0)
y.write(b'a')
b = x.read(1)
self.assertEqual(b, b'a')
y.writelines([b'2'])
b = x.read(1)
self.assertEqual(b, b'2')示例2: test_seek
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
def test_seek(self):
fileno, path = tempfile.mkstemp()
s = b'a' * 1024
os.write(fileno, b'B' * 15)
os.write(fileno, s)
os.close(fileno)
try:
with open(path, 'rb') as f:
f.seek(15)
native_data = f.read(1024)
with open(path, 'rb') as f_raw:
f = FileObject(f_raw, 'rb')
if hasattr(f, 'seekable'):
# Py3
self.assertTrue(f.seekable())
f.seek(15)
self.assertEqual(15, f.tell())
fileobj_data = f.read(1024)
self.assertEqual(native_data, s)
self.assertEqual(native_data, fileobj_data)
finally:
os.remove(path)示例3: _do_test_del
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
def _do_test_del(self, pipe, **kwargs):
r, w = pipe
s = FileObject(w, 'wb', **kwargs)
ts = type(s)
s.write(b'x')
try:
s.flush()
except IOError:
# Sometimes seen on Windows/AppVeyor
print("Failed flushing fileobject", repr(s), file=sys.stderr)
import traceback
traceback.print_exc()
del s # Deliberately getting ResourceWarning with FileObject(Thread) under Py3
gc.collect() # PyPy
if kwargs.get("close", True):
try:
os.close(w)
except (OSError, IOError):
pass # expected, because FileObject already closed it
else:
raise AssertionError('os.close(%r) must not succeed on %r' % (w, ts))
else:
os.close(w)
fobj = FileObject(r, 'rb')
self.assertEqual(fobj.read(), b'x')
fobj.close()示例4: test_newlines
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
def test_newlines(self):
r, w = os.pipe()
lines = [b'line1\n', b'line2\r', b'line3\r\n', b'line4\r\nline5', b'\nline6']
g = gevent.spawn(writer, FileObject(w, 'wb'), lines)
try:
fobj = FileObject(r, 'rU')
result = fobj.read()
fobj.close()
self.assertEqual('line1\nline2\nline3\nline4\nline5\nline6', result)
finally:
g.kill()示例5: _test_del
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
def _test_del(self, **kwargs):
r, w = os.pipe()
s = FileObject(w, 'wb')
s.write(b'x')
s.flush()
if PYPY:
s.close()
else:
del s # Deliberately getting ResourceWarning under Py3
try:
os.close(w)
except OSError:
pass # expected, because SocketAdapter already closed it
else:
raise AssertionError('os.close(%r) must not succeed' % w)
fobj = FileObject(r, 'rb')
self.assertEqual(fobj.read(), b'x')
fobj.close()示例6: _execute_child
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
def _execute_child(self, args, executable, preexec_fn, close_fds,
cwd, env, universal_newlines,
startupinfo, creationflags, shell,
p2cread, p2cwrite,
c2pread, c2pwrite,
errread, errwrite):
"""Execute program (POSIX version)"""
if isinstance(args, string_types):
args = [args]
else:
args = list(args)
if shell:
args = ["/bin/sh", "-c"] + args
if executable:
args[0] = executable
if executable is None:
executable = args[0]
self._loop.install_sigchld()
# For transferring possible exec failure from child to parent
# The first char specifies the exception type: 0 means
# OSError, 1 means some other error.
errpipe_read, errpipe_write = self.pipe_cloexec()
try:
try:
gc_was_enabled = gc.isenabled()
# Disable gc to avoid bug where gc -> file_dealloc ->
# write to stderr -> hang. http://bugs.python.org/issue1336
gc.disable()
try:
self.pid = fork()
except:
if gc_was_enabled:
gc.enable()
raise
if self.pid == 0:
# Child
try:
# Close parent's pipe ends
if p2cwrite is not None:
os.close(p2cwrite)
if c2pread is not None:
os.close(c2pread)
if errread is not None:
os.close(errread)
os.close(errpipe_read)
# When duping fds, if there arises a situation
# where one of the fds is either 0, 1 or 2, it
# is possible that it is overwritten (#12607).
if c2pwrite == 0:
c2pwrite = os.dup(c2pwrite)
if errwrite == 0 or errwrite == 1:
errwrite = os.dup(errwrite)
# Dup fds for child
def _dup2(a, b):
# dup2() removes the CLOEXEC flag but
# we must do it ourselves if dup2()
# would be a no-op (issue #10806).
if a == b:
self._set_cloexec_flag(a, False)
elif a is not None:
os.dup2(a, b)
self._remove_nonblock_flag(b)
_dup2(p2cread, 0)
_dup2(c2pwrite, 1)
_dup2(errwrite, 2)
# Close pipe fds. Make sure we don't close the
# same fd more than once, or standard fds.
closed = set([None])
for fd in [p2cread, c2pwrite, errwrite]:
if fd not in closed and fd > 2:
os.close(fd)
closed.add(fd)
# Close all other fds, if asked for
if close_fds:
self._close_fds(but=errpipe_write)
if cwd is not None:
os.chdir(cwd)
if preexec_fn:
preexec_fn()
if env is None:
os.execvp(executable, args)
else:
os.execvpe(executable, args, env)
except:
exc_type, exc_value, tb = sys.exc_info()
# Save the traceback and attach it to the exception object
exc_lines = traceback.format_exception(exc_type,
#.........这里部分代码省略.........
示例7: Popen
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
class Popen(object):
def __init__(self, args, bufsize=None, executable=None,
stdin=None, stdout=None, stderr=None,
preexec_fn=None, close_fds=_PLATFORM_DEFAULT_CLOSE_FDS, shell=False,
cwd=None, env=None, universal_newlines=False,
startupinfo=None, creationflags=0, threadpool=None,
**kwargs):
"""Create new Popen instance."""
if not PY3 and kwargs:
raise TypeError("Got unexpected keyword arguments", kwargs)
pass_fds = kwargs.pop('pass_fds', ())
start_new_session = kwargs.pop('start_new_session', False)
restore_signals = kwargs.pop('restore_signals', True)
hub = get_hub()
if bufsize is None:
# bufsize has different defaults on Py3 and Py2
if PY3:
bufsize = -1
else:
bufsize = 0
if not isinstance(bufsize, integer_types):
raise TypeError("bufsize must be an integer")
if mswindows:
if preexec_fn is not None:
raise ValueError("preexec_fn is not supported on Windows "
"platforms")
any_stdio_set = (stdin is not None or stdout is not None or
stderr is not None)
if close_fds is _PLATFORM_DEFAULT_CLOSE_FDS:
if any_stdio_set:
close_fds = False
else:
close_fds = True
elif close_fds and any_stdio_set:
raise ValueError("close_fds is not supported on Windows "
"platforms if you redirect stdin/stdout/stderr")
if threadpool is None:
threadpool = hub.threadpool
self.threadpool = threadpool
self._waiting = False
else:
# POSIX
if close_fds is _PLATFORM_DEFAULT_CLOSE_FDS:
# close_fds has different defaults on Py3/Py2
if PY3:
close_fds = True
else:
close_fds = False
if pass_fds and not close_fds:
import warnings
warnings.warn("pass_fds overriding close_fds.", RuntimeWarning)
close_fds = True
if startupinfo is not None:
raise ValueError("startupinfo is only supported on Windows "
"platforms")
if creationflags != 0:
raise ValueError("creationflags is only supported on Windows "
"platforms")
assert threadpool is None
self._loop = hub.loop
if PY3:
self.args = args
self.stdin = None
self.stdout = None
self.stderr = None
self.pid = None
self.returncode = None
self.universal_newlines = universal_newlines
self.result = AsyncResult()
# Input and output objects. The general principle is like
# this:
#
# Parent Child
# ------ -----
# p2cwrite ---stdin---> p2cread
# c2pread <--stdout--- c2pwrite
# errread <--stderr--- errwrite
#
# On POSIX, the child objects are file descriptors. On
# Windows, these are Windows file handles. The parent objects
# are file descriptors on both platforms. The parent objects
# are None when not using PIPEs. The child objects are None
# when not redirecting.
(p2cread, p2cwrite,
c2pread, c2pwrite,
errread, errwrite) = self._get_handles(stdin, stdout, stderr)
# We wrap OS handles *before* launching the child, otherwise a
# quickly terminating child could make our fds unwrappable
# (see #8458).
if mswindows:
#.........这里部分代码省略.........
示例8: _execute_child
# 需要导入模块: from gevent.fileobject import FileObject [as 别名]
# 或者: from gevent.fileobject.FileObject import read [as 别名]
def _execute_child(self, args, executable, preexec_fn, close_fds,
pass_fds, cwd, env, universal_newlines,
startupinfo, creationflags, shell,
p2cread, p2cwrite,
c2pread, c2pwrite,
errread, errwrite,
restore_signals, start_new_session):
"""Execute program (POSIX version)"""
if PY3 and isinstance(args, (str, bytes)):
args = [args]
elif not PY3 and isinstance(args, string_types):
args = [args]
else:
args = list(args)
if shell:
args = ["/bin/sh", "-c"] + args
if executable:
args[0] = executable
if executable is None:
executable = args[0]
self._loop.install_sigchld()
# For transferring possible exec failure from child to parent
# The first char specifies the exception type: 0 means
# OSError, 1 means some other error.
errpipe_read, errpipe_write = self.pipe_cloexec()
# errpipe_write must not be in the standard io 0, 1, or 2 fd range.
low_fds_to_close = []
while errpipe_write < 3:
low_fds_to_close.append(errpipe_write)
errpipe_write = os.dup(errpipe_write)
for low_fd in low_fds_to_close:
os.close(low_fd)
try:
try:
gc_was_enabled = gc.isenabled()
# Disable gc to avoid bug where gc -> file_dealloc ->
# write to stderr -> hang. http://bugs.python.org/issue1336
gc.disable()
try:
self.pid = fork_and_watch(self._on_child, self._loop, True, fork)
except:
if gc_was_enabled:
gc.enable()
raise
if self.pid == 0:
# Child
try:
# Close parent's pipe ends
if p2cwrite is not None:
os.close(p2cwrite)
if c2pread is not None:
os.close(c2pread)
if errread is not None:
os.close(errread)
os.close(errpipe_read)
# When duping fds, if there arises a situation
# where one of the fds is either 0, 1 or 2, it
# is possible that it is overwritten (#12607).
if c2pwrite == 0:
c2pwrite = os.dup(c2pwrite)
if errwrite == 0 or errwrite == 1:
errwrite = os.dup(errwrite)
# Dup fds for child
def _dup2(a, b):
# dup2() removes the CLOEXEC flag but
# we must do it ourselves if dup2()
# would be a no-op (issue #10806).
if a == b:
self._set_cloexec_flag(a, False)
elif a is not None:
os.dup2(a, b)
self._remove_nonblock_flag(b)
_dup2(p2cread, 0)
_dup2(c2pwrite, 1)
_dup2(errwrite, 2)
# Close pipe fds. Make sure we don't close the
# same fd more than once, or standard fds.
closed = set([None])
for fd in [p2cread, c2pwrite, errwrite]:
if fd not in closed and fd > 2:
os.close(fd)
closed.add(fd)
if cwd is not None:
os.chdir(cwd)
if preexec_fn:
preexec_fn()
# Close all other fds, if asked for. This must be done
# after preexec_fn runs.
if close_fds:
#.........这里部分代码省略.........