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Python: Making a class to use complex numbers

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I am currently trying to write a program that deals with complex numbers. I have to use classes and methods. I am trying to be able to add, subtract, multiply etc., complex numbers, as well as compare them to one another. I think I have gotten a good start but have some issues. I have started each method, and I think I just need to fill in the gaps. In the method, I used self.x as a placeholder. I'm not really sure what goes there. First off, the program needs to create it's own complex numbers. I'm new to making methods and functions and I'm not sure if I used (self) in the correct places. I

Eclipse CDT syntax error on attribute keyword

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I would like to know if there is a way to get rid of CDT syntax error warnings when using gcc's " __attribute__ " keyword. It goes without saying that I would not like to switch off CDT syntax check. The "ECLIPSE_THINKS_THIS_IS_SET_BUT_GCC_DOESNT" definition (from ams 's answer) really extsts and it called __CDT_PARSER__ . For example: #ifdef __CDT_PARSER__ #define __FILE__ "<file>" #define __LINE__ (-1) #define __DATE__ "<date>" #define __TIME__ "<time>" #endif // #ifdef __CDT_PARSER__ Hope this will be helpful. I've not tried it, and I've not used Eclipse for some time, but here's an idea:

Python invalid syntax with “with” statement

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问题 I am working on writing a simple python application for linux (maemo). However I am getting SyntaxError: invalid syntax on line 23: with open(file,'w') as fileh: The code can be seen here: http://pastebin.com/MPxfrsAp I can not figure out what is wrong with my code, I am new to python and the "with" statement. So, what is causing this code to error, and how can I fix it? Is it something wrong with the "with" statement? Thanks! 回答1: Most likely, you are using an earlier version of Python that

For loop after import doesn't work in Python one-liner

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If I use import and a for follows afterwards I get an invalid syntax error. I have no idea why this happens. > python3 -c 'import os; for a in range(1,5): print(a)' File "<string>", line 1 import os; for a in range(1,5): print(a) ^ Removing the import works fine: > python3 -c 'for a in range(1,5): print(a)' 1 2 3 4 or totally removing the for loop: > python3 -c 'import os; print(10)' 10 So what's going on?? It's an error because it's not in the Python grammar. If you check out the syntax specification for compound statements , you'll see that a statement list (i.e. what you're making with the

Eclipse CDT: Disable red underlining

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I use eclipse cdt and I included some files. Unfortunalty I cannot add the include path to my eclipse project since then eclipse will always crash when it starts indexing the newly added includes. Therefore I would like to turn off the feature that highlights errors. Where can I do this? This is probably not the answer to your problem, but it's actually the answer to your question (which I was looking for and now found out myself): How to disable the red underlining, which can be pretty annoying because it hides underscore characters. Go to Preferences -> General -> Editors -> Text Editors ->

what's wrong with this include statement that i did in php? [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . <?php include("articles/article_6.html"); ?> i wanted the article to be posted on my website but it gives the error: Parse error: syntax error, unexpected 'version' (T_STRING) in /opt/lampp/htdocs/white_coats/articles/article_6.html on line 1 回答1: article_6.html has no php tags. its just a word file that was

Parse error: syntax error, unexpected T_STRING 59 [closed]

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问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . Please fix this piece of coding. This is what it says "Parse error: syntax error, unexpected T_STRING in /home/timmycpc/public_html/ItemDatabase/index

Getting: SyntaxError: missing ) after argument list but can't find out whats wrong with hulpfile.js

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问题 Hi I'm getting an error starting 'gulp default' with the following gulp file. I cannot figure out whats wrong with the file. var gulp = require('gulp'); var sass = require('gulp-sass'); var sourcemaps = require('gulp-sourcemaps'); var autoprefixer = require('gulp-autoprefixer'); var browserSync = require('browser-sync').create(); var input = './scss/**/*.scss'; var output = './css'; gulp.task('sass', function() { return gulp.src(input) .pipe(sourcemaps.init()) .pipe(sass(errLogToConsole: true

Wrong number of arguments when a calling function from class in Python

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问题 I'm trying to write an implementation of a genetic algorithm in python. It says there I am calling it with two arguments when only one is allowed, but I'm sure I'm not. Here is the relevant code: class GA: def __init__(self, best, pops=100, mchance=.07, ps=-1): import random as r self.pop = [[] for _ in range(pops)] if ps == -1: ps = len(best) for x in range(len(self.pop)): #Creates array of random characters for a in range(ps): self.pop[x].append(str(unichr(r.randint(65,122)))) def mutate

Getting a Parse error: syntax error, unexpected '}', expecting ',' or '; [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . Here is my code. I'm new to php and just trying to edit a page using Kompozer. When I published the site back to the ftp server this error suddenly appeared on the page. Odd since I didn't even touch this code. (I have since touched the below code trying to fix it). Any help fixing this code would be much