本文整理汇总了Python中fs.filelike.StringIO.truncate方法的典型用法代码示例。如果您正苦于以下问题：Python StringIO.truncate方法的具体用法？Python StringIO.truncate怎么用？Python StringIO.truncate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fs.filelike.StringIO的用法示例。
在下文中一共展示了StringIO.truncate方法的2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: open
# 需要导入模块: from fs.filelike import StringIO [as 别名]
# 或者: from fs.filelike.StringIO import truncate [as 别名]
def open(self, path, mode='r', buffering=-1, encoding=None, errors=None, newline=None, line_buffering=False, **kwargs):
# TODO: chunked transport of large files
epath = self.encode_path(path)
if "w" in mode:
self.proxy.set_contents(epath, xmlrpclib.Binary(b("")))
if "r" in mode or "a" in mode or "+" in mode:
try:
data = self.proxy.get_contents(epath, "rb").data
except IOError:
if "w" not in mode and "a" not in mode:
raise ResourceNotFoundError(path)
if not self.isdir(dirname(path)):
raise ParentDirectoryMissingError(path)
self.proxy.set_contents(path, xmlrpclib.Binary(b("")))
else:
data = b("")
f = StringIO(data)
if "a" not in mode:
f.seek(0, 0)
else:
f.seek(0, 2)
oldflush = f.flush
oldclose = f.close
oldtruncate = f.truncate
def newflush():
self._lock.acquire()
try:
oldflush()
self.proxy.set_contents(epath, xmlrpclib.Binary(f.getvalue()))
finally:
self._lock.release()
def newclose():
self._lock.acquire()
try:
f.flush()
oldclose()
finally:
self._lock.release()
def newtruncate(size=None):
self._lock.acquire()
try:
oldtruncate(size)
f.flush()
finally:
self._lock.release()
f.flush = newflush
f.close = newclose
f.truncate = newtruncate
return f示例2: open
# 需要导入模块: from fs.filelike import StringIO [as 别名]
# 或者: from fs.filelike.StringIO import truncate [as 别名]
def open(self, path, mode="r"):
# TODO: chunked transport of large files
path = self.encode_path(path)
if "w" in mode:
self.proxy.set_contents(path,xmlrpclib.Binary(""))
if "r" in mode or "a" in mode or "+" in mode:
try:
data = self.proxy.get_contents(path).data
except IOError:
if "w" not in mode and "a" not in mode:
raise ResourceNotFoundError(path)
if not self.isdir(dirname(path)):
raise ParentDirectoryMissingError(path)
self.proxy.set_contents(path,xmlrpclib.Binary(""))
else:
data = ""
f = StringIO(data)
if "a" not in mode:
f.seek(0,0)
else:
f.seek(0,2)
oldflush = f.flush
oldclose = f.close
oldtruncate = f.truncate
def newflush():
oldflush()
self.proxy.set_contents(path,xmlrpclib.Binary(f.getvalue()))
def newclose():
f.flush()
oldclose()
def newtruncate(size=None):
oldtruncate(size)
f.flush()
f.flush = newflush
f.close = newclose
f.truncate = newtruncate
return f