output | 易学教程

How to remove square brackets from list in Python? [duplicate]

阅读更多关于 How to remove square brackets from list in Python? [duplicate]

问题 This question already has answers here : Print list without brackets in a single row (11 answers) Closed 3 years ago . LIST = [\'Python\',\'problem\',\'whatever\'] print(LIST) When I run this program I get [Python, problem, whatever] Is it possible to remove that square brackets from output? 回答1: You could convert it to a string instead of printing the list directly: print(", ".join(LIST)) If the elements in the list aren't strings, you can convert them to string using either repr (if you

C/C++ printf() before scanf() issue

阅读更多关于 C/C++ printf() before scanf() issue

I'm using Eclipse to code in C/C++ and I'm struggling with what might be something pretty easy. In my code below I use printf() and after scanf() . Althougth printf is written before scanf() the output differs. I was able to find out something about similar issue here . But I wasn't able to solve it. Any ideas? Code: #include <stdio.h> int main() { int myvariable; printf("Enter a number:"); scanf("%d", &myvariable); printf("%d", myvariable); return 0; } Expected output: Enter a number:1 1 Instead I get: 1 Enter a number:1 Your output is being buffered. You have 4 options: explicit flush fflush

How to display progress of scipy.optimize function?

阅读更多关于 How to display progress of scipy.optimize function?

问题 I use scipy.optimize to minimize a function of 12 arguments. I started the optimization a while ago and still waiting for results. Is there a way to force scipy.optimize to display its progress (like how much is already done, what are the current best point)? 回答1: As mg007 suggested, some of the scipy.optimize routines allow for a callback function (unfortunately leastsq does not permit this at the moment). Below is an example using the "fmin_bfgs" routine where I use a callback function to

CMake output/build directory

阅读更多关于 CMake output/build directory

问题 I\'m pretty new to CMake, and read a few tutorials on how to use it, and wrote some complicated 50 lines of CMake script in order to make a program for 3 different compilers. This probably concludes all my knowledge in CMake. Now my problem is that I have some source code, whose folder I don\'t want to touch/mess with when I make the program. I want that all CMake and make output files and folders to go into ../Compile/ , so I changed a few variables in my CMake script for that, and it worked

Recreate original PHP array from print_r output

阅读更多关于 Recreate original PHP array from print_r output

问题 Let\'s say I have this output from some source where I don\'t have access to the original PHP created array: Array ( [products] => Array ( [name] => Arduino Nano Version 3.0 mit ATMEGA328P [id] => 10005 ) [listings] => Array ( [category] => [title] => This is the first line This is the second line [subtitle] => This is the first subtitle This is the second subtitle [price] => 24.95 [quantity] => [stock] => [shipping_method] => Slow and cheap [condition] => New [defects] => ) [table_count] =>

While (( c = getc(file)) != EOF) loop won't stop executing

阅读更多关于 While (( c = getc(file)) != EOF) loop won't stop executing

I can't figure out why my while loop won't work. The code works fine without it... The purpose of the code is to find a secret message in a bin file. So I got the code to find the letters, but now when I try to get it to loop until the end of the file, it doesn't work. I'm new at this. What am I doing wrong? main(){ FILE* message; int i, start; long int size; char keep[1]; message = fopen("c:\\myFiles\\Message.dat", "rb"); if(message == NULL){ printf("There was a problem reading the file. \n"); exit(-1); } //the first 4 bytes contain an int that tells how many subsequent bytes you can throw

Create Java console inside a GUI panel

阅读更多关于 Create Java console inside a GUI panel

How can I create an instance of the Java console inside of a GUI panel? Lawrence Dol Here's a functioning class. You can install an instance of this into the system out and err using: PrintStream con=new PrintStream(new TextAreaOutputStream(...)); System.setOut(con); System.setErr(con); Updated 2014-02-19 : To use EventQueue.invokeLater() to avoid GUI threading issues which can crop up very rarely with the original. Updated 2014-02-27 : Better implementation Updated 2014-03-25 : Correct recording & deletion of lines in text area to be within the run() method to avoid race-condition between

How can I suppress column header output for a single SQL statement?

阅读更多关于 How can I suppress column header output for a single SQL statement?

问题 I\'m executing some SQL statements in batch (using the mysql command-line binary). I want one of my several SELECT statements to not print the column headers, just the selected records. Is this possible? 回答1: Invoke mysql with the -N (the alias for -N is --skip-column-names ) option: mysql -N ... use testdb; select * from names; +------+-------+ | 1 | pete | | 2 | john | | 3 | mike | +------+-------+ 3 rows in set (0.00 sec) Credit to ErichBSchulz for pointing out the -N alias. To remove the

How to use python numpy.savetxt to write strings and float number to an ASCII file?

阅读更多关于 How to use python numpy.savetxt to write strings and float number to an ASCII file?

问题 I have a set of lists that contain both strings and float numbers, such as: import numpy as num NAMES = num.array([\'NAME_1\', \'NAME_2\', \'NAME_3\']) FLOATS = num.array([ 0.5 , 0.2 , 0.3 ]) DAT = num.column_stack((NAMES, FLOATS)) I want to stack these two lists together and write them to a text file in the form of columns; therefore, I want to use numpy.savetxt (if possible) to do this. num.savetxt(\'test.txt\', DAT, delimiter=\" \") When I do this, I get the following error: >>> num

PHP - while loop (!feof()) isn't outputting/showing everything

阅读更多关于 PHP - while loop (!feof()) isn't outputting/showing everything

问题 I am trying to read (and echo) everything of a .txt-File. This is my code: $handle = @fopen(\"item_sets.txt\", \"r\"); while (!feof($handle)) { $buffer = fgets($handle, 4096); $trimmed = trim($buffer); echo $trimmed; } This is my \"item_sets.txt\": http://pastebin.com/sxapZGuW But it doesn\'t echo everything (and changing how much it shows depending on if and how many characters i echo after it). var_dump() shows me that the last string is never finished printing out. That looks like this: \"