piping

问题 I have a script that fails because some files are missing. Running the script and piping it to grep $ ./adder | grep Error produces the following output: Error in <TFile::ReadBuffer>: error reading all requested bytes from file v2.2_V3_194424_194712/output_853.root, got 0 of 300 Error in <TFile::Init>: v2.2_V3_194424_194712/output_853.root not a ROOT file and similar output with different files I'd like to extract the root files like v2.2_V3_194424_194712/output_853.root from this output, but

问题 (Windows) I wrote some Python code that calls the program SoX (subprocess module), which outputs the progress on STDERR, if you specify it to do so. I want to get the percentage status from the output. If I call it not from the Python script, it starts immediately and has a smooth progression till 100%. If I call it from the Python script, it lasts a few seconds till it starts and then it alternates between slow output and fast output. Although I read char by char sometimes there RUSHES out a

问题 I can run the following command xwd -root | xwdtopnm | pnmtojpeg > screen.jpg in a terminal under linux and it will produce a screenshot of my current screen. I try to do the following with the code: #include <stdio.h> #include <stdlib.h> int main() { FILE *fpipe; char *command="xwd -root | xwdtopnm | pnmtojpeg"; char line[256]; if ( !(fpipe = (FILE*)popen(command,"r")) ) { // If fpipe is NULL perror("Problems with pipe"); exit(1); } while ( fgets( line, sizeof line, fpipe)) { //printf("%s",

问题 I'm running ./sample.py --url http://blah.com without error, though if I run ./sample.py --url http://blah.com | wc -l or similar I receive an error: UnicodeEncodeError: 'ascii' codec can't encode character u'\u200f' in position 0: ordinal not in range(128) How do I make a python script compatible with my terminal commands? I keep seeing reference to sys.stdin.isatty though its use case appears to be opposite. 回答1: When Python detects that it is printing to a terminal, sys.stdout.encoding is

问题 Is it possible to run a t.test from piping operators? I tried to find the answer to this, but most of the questions around this topic look at doing many tests on the same dataset. I've looked a broom package, but it seems to be good for reading the results. What I'm interested in is whether it's possible to just use piping and run the t.test() on the output. For example, here is some sample data library(dplyr) d <- data.frame( group = sample(LETTERS[1:2], size = 10, replace = T), amount =

问题 I'm writing a php script to pipe email from a forward in my CPanel. I have found this script on the internet; I am trying to parse the email and send it back to myself for testing, but it instead returns this error: The following text was generated during the delivery attempt: ------ pipe to |/home1/<account>/pipe.php generated by pipe@example.com ------ Error in argument 1, char 3: option not found < Usage: php [-q] [-h] [-s] [-v] [-i] [-f <file>] php <file> [args...] -a Run interactively -b

问题 I am spreading multiple categorical variables to Boolean columns using tidyr::spread() . As the data contains NAs, spread creates a new column without a name. What I'm looking for is a way to get rid off the NAs using a) a piping solution (I've tried select_() and '['() , but don't know how to refer to the NA column's name or index) or b) a custom function, which would be even better c) a way to simply not generate the NA columns, Hadleyverse compatible, if possible. Below is my current (and

问题 I am trying to use email piping with PHP. I have it working except I can't get the 'To' field. I am using the following PHP code: #!/usr/bin/php -q <?php // read from stdin $fd = fopen("php://stdin", "r"); $email = ""; while (!feof($fd)) { $email .= fread($fd, 1024); $to1 = explode ("\nTo: ", $email); $to2 = explode ("\n", $to1[1]); $to = str_replace ('>', '', str_replace('<', '', $to2[0])); } fclose($fd); mail('email@example.com','From my email pipe!','"' . $to . '"'); ?> If I use a email

问题 I have constructed the following program to try to pipe in my own shell. A StringArray is simply a char** I have constructed. The code runs fine, but when I put in cat txt.txt | grep a , nothing prints back to the screen. When debugging, I saw that the code seems to stop around like 152 (where the print-out command is), where pid==0 and i==0 . For context, I'm calling this function in another function after a pipe has been detected. void doPipe(StringArray sa) { printf("In 69\n"); int filedes

问题 I have a PHP Script that received information from a piped email forwarder. Currently everything works perfectly. I just want to manipulate the received parameters to receive only the data I want from the email the script is: #!/usr/local/bin/php -q <?PHP //get email $fd = fopen("php://stdin", "r"); $email_content = ""; while (!feof($fd)) { $email_content .= fread($fd, 1024); } fclose($fd); //get email end //get variables from email start //split the string into array of strings, each of the