buffer

问题 Update based on Anthony Sottile's Answer I re-implemented his solution to simplify the problem. Lets take Docker and Django out of the equation. The goal is to use Pandas to read excel by both of the following methods: python example.py - < /path/to/file.xlsx cat /path/to/file.xlsx | python example.py - where example.py is reproduced below: import argparse import contextlib from typing import IO import sys import pandas as pd @contextlib.contextmanager def file_ctx(filename: str) -> IO[bytes]

问题 One of by service contract passes a Huge DataSet to the Client. I am using BufferedTranfer mode. In very rare cases I have more data to be send, because of this reason I am in a confusion to change the TransportMode to Streamed. Is that good practice to use "DataSet" for transfer data through NetTcpBinding ? Any alternatives to DataSets ? 回答1: Please, do not return datasets from a WCF service. For information why see: Returning DataSets from WebServices is the Spawn of Satan and Represents

问题 So, I've got a ton of files open in my vim buffer, and I'm working on a feature branch with git. Suddenly, I realize that I need to revert back to my master branch to make a quick fix. After making my commits, I leave my vim session open and switch back over to the master branch. However, when I try and load the files I need from the buffer, I now get the message Warning: File "<filename>" has changed since editing started This makes complete since to me. The file in the buffer is from my

问题 I've found something similar like this in a piece of code: use IO::Handle; autoflush STDOUT 1; print ''; Is the purpose of "print" to empty a possibly filled buffer? 回答1: The print call should be a wasted system call. perlvar states, "If set to nonzero, forces a flush right away and after every write or print on the currently selected output channel." The code in this example should turn on autoflush, causing a flush, then add noting to the STDOUT buffer and cause a flush. There may be

问题 There are some good posts on here (such as this one) on how to make a circular buffer in MATLAB. However from looking at them, I do not believe they fit my application, because what I am seeking, is a circular buffer solution in MATLAB, that does NOT involve any copying of old data. To use a simple example, let us say that I am processing 50 samples at a time, and I read in 10 samples each iteration. I would first run through 5 iterations, fill up my buffer, and in the end, process my 50

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: How to fix “Headers already sent” error in PHP [Mon Jan 10 21:01:26 2011] [error] [client xx.xx.xxx.xx] PHP Warning: Cannot modify header information - headers already sent in Unknown on line 0, referer: www.example.com/some.php Why PHP is not able to locate where the headers were sent from? 回答1: See if you have a space after <? . The header function is quite sensitive and doesnt work if anything is outputted

问题 The python documentation on array clearly states that the array conforms to the buffer interface. It even suggest not using the buffer_info() method. But when I try to get a Py_Buffer from C/C++ code with PyObject_GetBuffer() or use python's memoryview, I get a failure. For example, in python (I use version 2.7): >>> a = array.array('c') >>> memoryview(a) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: cannot make memory view because object does not have the

问题 The python documentation on array clearly states that the array conforms to the buffer interface. It even suggest not using the buffer_info() method. But when I try to get a Py_Buffer from C/C++ code with PyObject_GetBuffer() or use python's memoryview, I get a failure. For example, in python (I use version 2.7): >>> a = array.array('c') >>> memoryview(a) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: cannot make memory view because object does not have the

问题 I'm reading from a boost::asio::ip::udp::socket like this: using boost::asio::ip::udp; // ... char recv_buf[128]; udp::endpoint sender_endpoint; size_t len = socket.receive_from(boost::asio::buffer(recv_buf), sender_endpoint); Now, this works perfectly fine, but the maximum amount of characters that I am able to recieve is now 127. However I am facing a problem because I need to accept some data input of which the length can greatly vary (and is not of well-defined length with prefixed

问题 I am currently making a hypothetical producer consumer problem using java. The object is to have an operating system which is 1000 bytes, but only 500 bytes available to use for threads as 500 bytes have already been consumed by drivers and other operations. The threads are as follows: A thread to start a BubbleWitch2 session of 10 seconds, which requires 100 bytes of RAM per second A thread to start a Spotify stream of 20 seconds, which requires 250 bytes of RAM per second You should also