Hi I am trying to run multiple python functions using the same linker JS file. I am using electron, python, node.JS, and HTML.
function execute_python() {
var path = require("path")
const city = 'XYZ';
var options = {
scriptPath : path.join(__dirname, '../python/'),
args : [city]
}
const {PythonShell} = require("python-shell");
//will run python script
var shell = new PythonShell('main.py', options);
//output of script
shell.on('message', function(message) {
swal(message);
})
}
/*
shell.end(function(err,code,signal))
if(err) throw err;
console.log('The exit code was:'+ code)
console.log('The exit signal was:'+ signal)
console.log('finished')
})
}
*/
function execute_python2() {
var path = require("path")
const city2 = 'XYZ';
var options2 = {
scriptPath : path.join(__dirname, '../python/'),
args : [city2]
}
const {PythonShell} = require("python-shell");
//will run python script
var please = new PythonShell('main.py', options2);
//output of script
please.on('message', function(message) {
swal(message);
})
}
For some reason, both buttons I press will give the same output.
Here is my python file.
import sys
city = sys.argv[1]
print("Hi there")
city2= sys.argv[0]
sys.stdout.flush()
Here is my html file.
<button onclick="execute_python()">Execute Python file</button>
<button onclick="execute_python2()">Execute Python file</button>
</body>
<script>
require('./index.js')
</script>
<script src="./js/linker.js"></script>
Let me know what I am missing here. I tried making two different arguments on the javascript side of things with having different arguments names in the options.
Related
I need to produce a screencast of an IPython session, and to avoid confusing viewers, I want to disable all warnings emitted by warnings.warn calls from different packages. Is there a way to configure the ipythonrc file to automatically disable all such warnings?
Place:
import warnings
warnings.filterwarnings('ignore')
inside ~/.ipython/profile_default/startup/disable-warnings.py.
Quite often it is useful to see a warning once. This can be set by:
warnings.filterwarnings(action='once')
I hide the warnings in the pink boxes by running the following code in a cell:
from IPython.display import HTML
HTML('''<script>
code_show_err=false;
function code_toggle_err() {
if (code_show_err){
$('div.output_stderr').hide();
} else {
$('div.output_stderr').show();
}
code_show_err = !code_show_err
}
$( document ).ready(code_toggle_err);
</script>
To toggle on/off output_stderr, click here.''')
The accepted answer does not work in Jupyter (at least when using some libraries).
The JavaScript solutions here only hide warnings that are already showing but not warnings that would be shown in the future.
To hide/unhide warnings in Jupyter and JupyterLab I wrote the following script that essentially toggles CSS to hide/unhide warnings.
%%javascript
(function(on) {
const e = $("<a>Setup failed</a>");
const ns = "js_jupyter_suppress_warnings";
var cssrules = $("#" + ns);
if(!cssrules.length)
cssrules = $("<style id='" + ns + "' type='text/css'>div.output_stderr { } </style>").appendTo("head");
e.click(function() {
var s = 'Showing';
cssrules.empty()
if(on) {
s = 'Hiding';
cssrules.append("div.output_stderr, div[data-mime-type*='.stderr'] { display:none; }");
}
e.text(s + ' warnings (click to toggle)');
on = !on;
}).click();
$(element).append(e);
})(true);
For JupyterLab, this should work (#Alasja):
from IPython.display import HTML
HTML('''<script>
var code_show_err = false;
var code_toggle_err = function() {
var stderrNodes = document.querySelectorAll('[data-mime-type="application/vnd.jupyter.stderr"]')
var stderr = Array.from(stderrNodes)
if (code_show_err){
stderr.forEach(ele => ele.style.display = 'block');
} else {
stderr.forEach(ele => ele.style.display = 'none');
}
code_show_err = !code_show_err
}
document.addEventListener('DOMContentLoaded', code_toggle_err);
</script>
To toggle on/off output_stderr, click <a onclick="javascript:code_toggle_err()">here</a>.''')
I am Trying to run html page with electron + eel.
I have successfully loaded the webpage + eel.js.
My Problem is whenever I try to use require module in the javascript of the HTML page. it gives me the below:
Uncaught ReferenceError: require is not defined
The sequence is, launching the webapp using runner.py ( eel.start ), then electron start
Also, if I set mainWindow.loadFile('templates/index.html') in main.js file, instead of mainWindow.loadURL('http://localhost:8000/index.html'). the render just work fine and can handle electron window from main html javascript file. but eel is not loaded in this case.
If I tried the steps which in the guide. the electron html page opens normally with eel.js loaded up. but can not handle the electron window from html javascript file
runner.py
import eel
import eel.browsers
eel.init('templates')
eel.browsers.set_path('electron', 'node_modules/electron/dist/electron')
eel.start('index.html', mode='electron' , port=8000 ,host='localhost',disable_cache=True)
main.js:
// Modules to control application life and create native browser window
const {app, BrowserWindow} = require('electron')
const path = require('path')
function createWindow () {
// Create the browser window.
const mainWindow = new BrowserWindow({
width: 800,
height: 600,
webPreferences: {
preload: path.join(__dirname, 'preload.js'),
nodeIntegration: true,
enableRemoteModule: true
}
})
// and load the index.html of the app.
// mainWindow.loadFile('templates/index.html')
mainWindow.loadURL('http://localhost:8000/index.html')
// Open the DevTools.
// mainWindow.webContents.openDevTools()
}
// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.whenReady().then(() => {
createWindow()
app.on('activate', function () {
// On macOS it's common to re-create a window in the app when the
// dock icon is clicked and there are no other windows open.
if (BrowserWindow.getAllWindows().length === 0) createWindow()
})
})
// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', function () {
if (process.platform !== 'darwin') app.quit()
})
// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.
html javascript:
function login_check(){
var serverIP = document.getElementById('serverIP').value
var Username = document.getElementById('usernameEntry').value
var Password = document.getElementById('passwordEntry').value
var RememberMe = document.getElementById('remember-me-checkbox').checked
if(serverIP != "" && Username != "" && Password != ""){
document.querySelector('.progress-bar-container-div').classList.add('active')
}
else{
const window = require("electron").getCurrentWindow()
alert("Required Fields are empty.")
document.querySelector('.progress-bar-container-div').classList.remove('active')
window.minimize();
}
}
package.json:
{
"name": "electron-quick-start",
"version": "1.0.0",
"description": "A minimal Electron application",
"main": "main.js",
"scripts": {
"start": "electron ."
},
"repository": "https://github.com/electron/electron-quick-start",
"keywords": [
"Electron",
"quick",
"start",
"tutorial",
"demo"
],
"author": "GitHub",
"license": "CC0-1.0",
"devDependencies": {
"electron": "^5.0.0"
}
}
error:
Need a Python Script that will restart the kernel and rerun all the cells automatically without any human intervention.
I tried the following code below but needs a human intervention since it uses a toggle button.
from IPython.display import HTML, Javascript, display
def initialize():
display(HTML(
'''
<script>
code_show = false;
function restart_run_all(){
IPython.notebook.kernel.restart();
setTimeout(function(){
IPython.notebook.execute_all_cells();
}, 10000)
}
function code_toggle() {
if (code_show) {
$('div.input').hide(200);
} else {
$('div.input').show(200);
}
code_show = !code_show
}
</script>
<button onclick="code_toggle()">Click to toggle</button>
<button onclick="restart_run_all()">Click to Restart and Run all Cells</button>
'''
))
initialize()
modifying the code a bit seems to be working for me:
from IPython.display import HTML, Javascript, display
def initialize():
display(HTML(
'''
<script>
code_show = false;
function restart_run_all(){
IPython.notebook.kernel.restart();
setTimeout(function(){
IPython.notebook.execute_all_cells();
}, 10000)
}
function code_toggle() {
if (code_show) {
$('div.input').hide(200);
} else {
$('div.input').show(200);
}
code_show = !code_show
}
restart_run_all();
</script>
'''
))
Note: I just removed the buttons and called the restart_run_all() function before </ script>
I'm trying to spawn a child process to run a python script from Node. I have the following request that comes in:
/webcrawler?source=http://www.pygamers.com&method=BFS&nodeCount=3&depth=0&keyword=game
I have verified that my params are coming in correctly. Here is my code set up to handle the request in app.js:
app.get('/webcrawler', function(req, res){
var python = require('child_process').spawn(
'python',
["WebCrawler/Webcrawler.py"
, req.query.source
, req.query.method
, req.query.nodeCount
, req.query.depth
, req.query.keyword]
);
var output = "";
python.stdout.on('data', function(data){ output += data });
python.on('close', function(code){
if (code !== 0) {
return res.send(500, code);
}
return res.send(200, output);
});
});
I am calling my Python script, Webcrawler.py which is in the WebCrawler directory. The WebCrawler directory is in the same directory as app.js.
However, this request is giving me a 500, and I haven't been able to figure out why. It seems like I must be generating the child process incorrectly. I used this answer as a model for doing so.
It needs to be an absolute path, like /home/username/Webcrawler/webcrawler.py
Sounds like a path problem.
Also checkout python-shell package. Makes your life so much easier.
you can check this package on npm- native-python
it provides a very simple and powerful way to run python functions from node
might solve your problem.
import { runFunction } from '#guydev/native-python'
const example = async () => {
const input = [1,[1,2,3],{'foo':'bar'}]
const { error, data } = await runFunction('/path/to/file.py','hello_world', '/path/to/python', input)
// error will be null if no error occured.
if (error) {
console.log('Error: ', error)
}
else {
console.log('Success: ', data)
// prints data or null if function has no return value
}
}
python module
# module: file.py
def hello_world(a,b,c):
print( type(a), a)
# <class 'int'>, 1
print(type(b),b)
# <class 'list'>, [1,2,3]
print(type(c),c)
# <class 'dict'>, {'foo':'bar'}
I want to build an automation testing, so I have to know the errors that appear in the console of chrome.
there is an option to get the error lines that appear in the console?
In order to see the console: right click somewhere in the page, click "inspect element" and then go to "console".
I don't know C# but here's Java code that does the job, I hope you can translate it to C#
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.logging.LogEntries;
import org.openqa.selenium.logging.LogEntry;
import org.openqa.selenium.logging.LogType;
import org.openqa.selenium.logging.LoggingPreferences;
import org.openqa.selenium.remote.CapabilityType;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
public class ChromeConsoleLogging {
private WebDriver driver;
#BeforeMethod
public void setUp() {
System.setProperty("webdriver.chrome.driver", "c:\\path\\to\\chromedriver.exe");
DesiredCapabilities caps = DesiredCapabilities.chrome();
LoggingPreferences logPrefs = new LoggingPreferences();
logPrefs.enable(LogType.BROWSER, Level.ALL);
caps.setCapability(CapabilityType.LOGGING_PREFS, logPrefs);
driver = new ChromeDriver(caps);
}
#AfterMethod
public void tearDown() {
driver.quit();
}
public void analyzeLog() {
LogEntries logEntries = driver.manage().logs().get(LogType.BROWSER);
for (LogEntry entry : logEntries) {
System.out.println(new Date(entry.getTimestamp()) + " " + entry.getLevel() + " " + entry.getMessage());
//do something useful with the data
}
}
#Test
public void testMethod() {
driver.get("http://mypage.com");
//do something on page
analyzeLog();
}
}
Pay attention to setUp method in above code. We use LoggingPreferences object to enable logging. There are a few types of logs, but if you want to track console errors then LogType.BROWSER is the one that you should use. Then we pass that object to DesiredCapabilities and further to ChromeDriver constructor and voila - we have an instance of ChromeDriver with logging enabled.
After performing some actions on page we call analyzeLog() method. Here we simply extract the log and iterate through its entries. Here you can put assertions or do any other reporting you want.
My inspiration was this code by Michael Klepikov that explains how to extract performance logs from ChromeDriver.
You can get logs this way:
Driver().Manage().Logs.GetLog();
By specifying what log you are interested in you can get the browser log, that is:
Driver().Manage().Logs.GetLog(LogType.Browser);
Also remember to setup your driver accordingly:
ChromeOptions options = new ChromeOptions();
options.SetLoggingPreference(LogType.Browser, LogLevel.All);
driver = new ChromeDriver("path to driver", options);
This is the c# code for logging the brower log from chrome.
private void CheckLogs()
{
List<LogEntry> logs = Driver.Manage().Logs.GetLog(LogType.Browser).ToList();
foreach (LogEntry log in logs)
{
Log(log.Message);
}
}
here is my code for the actual log:
public void Log(string value, params object[] values)
{
// allow indenting
if (!String.IsNullOrEmpty(value) && value.Length > 0 && value.Substring(0, 1) != "*")
{
value = " " + value;
}
// write the log
Console.WriteLine(String.Format(value, values));
}
As per issue 6832 logging is not implemented yet for C# bindings. So there might not be an easy way to get this working as of now.
Here is a solution to get Chrome logs using the C#, Specflow and Selenium 4.0.0-alpha05.
Pay attention that the same code doesn't work with Selenium 3.141.0.
[AfterScenario]
public void AfterScenario(ScenarioContext context)
{
if (context.TestError != null)
{
GetChromeLogs(context); //Chrome logs are taken only if test fails
}
Driver.Quit();
}
private void GetChromeLogs()
{
var chromeLogs = Driver.Manage().Logs.GetLog(LogType.Browser).ToList();
}
public void Test_DetectMissingFilesToLoadWebpage()
{
try
{
List<LogEntry> logs = driver.Manage().Logs.GetLog(LogType.Browser).ToList();
foreach (LogEntry log in logs)
{
while(logs.Count > 0)
{
String logInfo = log.ToString();
if (log.Message.Contains("Failed to load resource: the server responded with a status of 404 (Not Found)"))
{
Assert.Fail();
}
else
{
Assert.Pass();
}
}
}
}
catch (NoSuchElementException e)
{
test.Fail(e.StackTrace);
}
}
You could do something like this in C#. It is a complete test case. Then print the console output as String i.e logInfo in your report. For some reason, Log(log.Message) from the solution above this one gave me build errors.So, I replaced it.
C# bindings to the Chrome console logs are finally available in Selenium 4.0.0-alpha05. Selenium 3.141.0 and prior do not have support.
Before instantiating a new ChromeDriver object, set the logging preference in a ChromeOptions object and pass that into ChromeDriver:
ChromeOptions options = new ChromeOptions();
options.SetLoggingPreference(LogType.Browser, LogLevel.All);
ChromeDriver driver = new ChromeDriver(options);
Then, to write the Chrome console logs to a flat file:
public void WriteConsoleErrors()
{
string strPath = "C:\\ConsoleErrors.txt";
if (!File.Exists(strPath))
{
File.Create(strPath).Dispose();
}
using (StreamWriter sw = File.AppendText(strPath))
{
var entries = driver.Manage().Logs.GetLog(LogType.Browser);
foreach (var entry in entries)
{
sw.WriteLine(entry.ToString());
}
}
}
driver.manage().logs().get("browser")
Gets all logs printed on the console. I was able to get all logs except Violations. Please have a look here Chrome Console logs not printing Violations