> Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "/usr/lib/python3.3/os.py", line 1032, in fdopen > return io.open(fd, *args, **kwargs) > io.UnsupportedOperation: File or stream is not seekable. >>> > > > I think that could be a bug...
UnsupportedOperation: File or stream is not seekable.具体来说,docker run -i <IMAGE> ./manage.py my_cli import - < /path/to/file.xlsx 不``` 起作用, 但是./manage.py my_cli import - < /path/to/file.xlsx 有效! Docker上下文内有某种差异。 但是我也注意到,即使不考虑Docker: ```js cat...
binary I/O and raw I/O. These are generic categories, and various backing stores can be used for each of them. A concrete object belonging to any of these categories is called a file object. Other common terms are stream and file-...
Created new windowinexisting browser session. To access the notebook,openthis fileina browser: file:///home/wesm/.local/share/jupyter/runtime/nbserver-185259-open.html Or copyandpaste one of these URLs: http://localhost:8888/?token=0a77b52fefe52ab83e3c35dff8de121e4...orhttp://127.0.0...
"""Write a list of lines to the stream. :type lines: collections.Iterable[unicode] :rtype: None """ pass 下面有关一个seek获取文件最后一行的操作例子: 1 2 3 4 5 6 7 8 9 10 with open('newfile.txt','rb+')asf: #for i in f: #这里的for循环是可以拿掉的,如果文件很大最好加上这...
restored from __doc__判断文件是否是同意tty设备"""isatty() -> true or false. True if the file is connected to a tty device."""returnFalsedefnext(self):#real signature unknown; restored from __doc__获取下一行数据,不存在,则报错"""x.next() -> the next value, or raise StopIteration"...
)) f.seek(3) printf.tell()) f.close() C:\Python35\python.exe F:/Python_code/sublime/Day06/file.py 0 3 1. 2. 3. 4. 5. 6. 7. 8. seekable(self): 指针是否可操作 1 f = open"hello.txt",r") 2 print(f.seek()) 3 f.close) 4 5 C:\Python35\python.exe F:/...
Using the context manager, the sys.stdout output can be redirected to any other stream or, in conjunction with io.StringIO, to a string. The latter can be especially useful, for example, to capture output from a function that was written to implement a command line interface. It is ...
isatty() Returns whether the file stream is interactive or not read() Returns the file content readable() Returns whether the file stream can be read or not readline() Returns one line from the file readlines() Returns a list of lines from the file seek() Change the file position seekab...
True if the stream is closed. fileno() Return the underlying file descriptor (an integer) of the stream if it exists. An OSError is raised if the IO object does not use a file descriptor. flush() Flush the write buffers of the stream if applicable. This does nothing for read-only and...