Develop Reference

Cannot click on tkinter button more than twice

I am a newbie to tkinter and have know idea what I am doing sometimes:D . I created a python script to get Corona Virus Stats from a GitHub post link The script has over 20 files in it so I thought I should just create one file to run all the other files. So what other better way to do it than creating a UI. And that's what I did I used tkinter to run all the files. If they clicked on x button then I would run abc. And I ended up running these files by importing them in a certain order(Don't know If that was the best way). So here is where I ran into an error. I don't exactly know if this error is because of how I imported my files or my tkinter code is just wrong. I just couldn't seem to click on a button twice. I would run my program and click on a button, it would run properly and then the next time I clicked on that same button It would just not work. There was no error and no output. Nothing would happen. Here is my code:
#Import tkinter
import tkinter as tk
from tkinter import *
from tkinter import simpledialog
tk = tk.Tk()
Max = 190
def RunDeaths():
#If they click on RunDeaths I will run this function
#Check if they have already entered a path
try:
open('/Users/test/Documents/python/Py_Programs/Hackathon/DeathStats/Info.txt','r')
from DeathStats import RunAll
except:
YourPath = simpledialog.askstring('Countries','''Please Enter Your Path To HACKATHON Folder:
Example:
\"/Users/Name/Documents/python/\"
Note: Leave out the HACKATHON folder and you must put a slash at the end''',parent=tk)
#Write this path to a file call Info.txt
file = open('/Users/test/Documents/python/Py_Programs/Hackathon/DeathStats/Info.txt','w')
file.write(str(YourPath)+'\n')
file.write(str(Max))
file.close()
#Run all the files that gather the data for Corona Virus Deaths
from DeathStats import RunAll
def RunRecoveredCases():
#If they click on RecoveredCases Run this
#Check If they had already entered a path
try:
open('/Users/test/Documents/python/Py_Programs/Hackathon/RecoveredCases/Info.txt','r')
from RecoveredCases import RunAll
except:
YourPath = simpledialog.askstring('Countries','''Please Enter Your Path To HACKATHON Folder:
Example:
\"/Users/Name/Documents/python/\"
Note: Leave out the HACKATHON folder and you must put a slash at the end''',parent=tk)
file = open('/Users/test/Documents/python/Py_Programs/Hackathon/RecoveredCases/Info.txt','w')
#Write there path to a file
file.write(str(YourPath)+'\n')
file.write(str(Max))
file.close()
#Run all the files that gather all the Recovered Cases
from RecoveredCases import RunAll
#* * Here is where I think I went wrong But Im not sure
Deaths = Button(tk,height = 20, width = 30, text='Run Deaths',command = RunDeaths,highlightbackground='#000000')
Recovered = Button(tk,height = 20, width = 30, text='Run Recovered Cases',command = RunRecoveredCases,highlightbackground='#000000')
Deaths.pack()
Recovered.pack()
tk.mainloop()
So my question and problem is: Why can I not click on a button more than twice?
This has happened to me before and I could not fix it. Any help would be appreciated.(If you would like to run my program because my explanation was just not good enough here is a git hub repo GitHub)
Thank You

It appears that you are assuming that from RecoveredCases import RunAll will run the code in RecoveredCases.py each time it is imported. That is a false assumption. Python caches code that is imported.
The proper way to use code in a separate file is to put the code in a function or class, import the function or class exactly once, and then call the function or instantiate the class whenever you want to run the code.

QGIS3.14 Resource Sharing symbols are not appearing in atlas export via standalone python script

I created a standalone python script to export my atlas layouts. Everything is working great except that the SVG symbols that I am using from the Resource Sharing plugin are just question marks, assuming that it is having trouble locating them. However, if I run the script via the startup.py in the QGIS3 folder everything works like expected. I would really like to avoid using this method though as it prevents you from using QGIS until the script finishes, which takes about 2 hours. I am hoping that I just need to add a simple environmental variable to my .bat file so that it can locate the Resource Sharing plugin. Thanks in advance for any help!
.bat file
#ECHO off
set OSGEO4W_ROOT=C:\OSGeo4W64
call "%OSGEO4W_ROOT%\bin\o4w_env.bat"
call "%OSGEO4W_ROOT%\bin\qt5_env.bat"
call "%OSGEO4W_ROOT%\bin\py3_env.bat"
path %OSGEO4W_ROOT%\apps\qgis\bin;%PATH%
set QGIS_PREFIX_PATH=%OSGEO4W_ROOT%\apps\qgis
set GDAL_FILENAME_IS_UTF8=YES
set VSI_CACHE=TRUE
set VSI_CACHE_SIZE=1000000
set QT_PLUGIN_PATH=%OSGEO4W_ROOT%\apps\qgis\qtplugins;%OSGEO4W_ROOT%\apps\qt5\plugins
SET PYCHARM="C:\Program Files\JetBrains\PyCharm 2019.2.3\bin\pycharm64.exe"
set PYTHONPATH=%OSGEO4W_ROOT%\apps\qgis\python
set PYTHONHOME=%OSGEO4W_ROOT%\apps\Python37
set PYTHONPATH=%OSGEO4W_ROOT%\apps\Python37\lib\site-packages;%PYTHONPATH%
set QT_QPA_PLATFORM_PLUGIN_PATH=%OSGEO4W_ROOT%\apps\Qt5\plugins\platforms
set QGIS_PREFIX_PATH=%OSGEO4W_ROOT%\apps\qgis
start "PyCharm aware of QGIS" /B %PYCHARM% %*
Python Script
from qgis.core import QgsApplication, QgsProject, QgsLayoutExporter
import os
import sys
def export_atlas(qgs_project_path, layout_name, outputs_folder):
# Open existing project
project = QgsProject.instance()
project.read(qgs_project_path)
print(f'Project in "{project.fileName()} loaded successfully')
# Open prepared layout that as atlas enabled and set
layout = project.layoutManager().layoutByName(layout_name)
# Export atlas
exporter = QgsLayoutExporter(layout)
settings = QgsLayoutExporter.PdfExportSettings()
exporter.exportToPdfs(layout.atlas(), outputs_folder, settings)
def run():
# Start a QGIS application without GUI
QgsApplication.setPrefixPath(r"C:\\OSGeo4W64\\apps\\qgis", True)
qgs = QgsApplication([], False)
qgs.initQgis()
sys.path.append(r'C:\OSGeo4W64\apps\qgis\python\plugins')
project_path = [project_path]
output_folder = [export_location]
layout_name_portrait = [portrait layout name]
layout_name_landscape = [landscape laytout name]
export_atlas(project_path, layout_name_portrait, output_folder)
export_atlas(project_path, layout_name_landscape, output_folder)
# Close the QGIS application
qgs.exitQgis()
run()

I guess that it might have something to do with the setting svg/searchPathsForSVG.
QgsSettings().setValue('svg/searchPathsForSVG', <your path>)

Python Orange (Version 3.3.6) on Window 10 can't create demo widget

As per the documentation, I created the following files:
setup.py (in folder C:\Python34\Lib\site-packages\Orange\widgets\orange-demo)
from setuptools import setup
setup(name="Demo",
packages=["orangedemo"],
package_data={"orangedemo": ["icons/*.svg"]},
classifiers=["Example :: Invalid"],
# Declare orangedemo package to contain widgets for the "Demo" category
entry_points={"orange.widgets": "Demo = orangedemo"},
)
and OWDataSamplerA.py (in folder C:\Python34\Lib\site-packages\Orange\widgets\orange-demo\orangedemo)
import sys
import numpy
import Orange.data
from Orange.widgets import widget, gui
class OWDataSamplerA (widget.OWWidget):
name = "Data Sampler"
description = "Randomly selects a subset of instances from the data set"
icon = "icons/DataSamplerA.svg"
priority = 10
inputs = [("Data", Orange.data.Table, "set_data")]
outputs = [("Sampled Data", Orange.data.Table)]
want_main_area = False
def __init__(self):
super().__init__()
# GUI
box = gui.widgetBox(self.controlArea, "Info")
self.infoa = gui.widgetLabel(box, 'No data on input yet, waiting to get something.')
self.infob = gui.widgetLabel(box, '')
def set_data(self, dataset):
if dataset is not None:
self.infoa.setText('%d instances in input data set' % len(dataset))
indices = numpy.random.permutation(len(dataset))
indices = indices[:int(numpy.ceil(len(dataset) * 0.1))]
sample = dataset[indices]
self.infob.setText('%d sampled instances' % len(sample))
self.send("Sampled Data", sample)
else:
self.infoa.setText('No data on input yet, waiting to get something.')
self.infob.setText('')
self.send("Sampled Data", None)
I created a .svg icon and left the __init__.py file blank. After running pip install -e ., a Demo.egg-info directory is created and it includes several files, but no demo widget is created. After restarting Python Orange no visible changes occur at all.
Any advice would be most welcome.

A separate version of Python 3.6 is bundled with Orange.
To install a new widget, you need to have the proper Python instance in the path.
On Windows, you can find a special shortcut "Orange Command Prompt". You will need to run it as Administrator to install new packages in newer version.
Once in the appropriate directory, you can run your pip install.. command.

Python application, py2exe, Inno Setup, os.system() start function does not work

I have made some application with PyQt4, which contains os.system() start function in it as a button, which basically opens a csv file.
import sqlite3
import sys
import os
.......
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
####
.............
####
# "CSV" button
self.pushButton_4 = QtGui.QPushButton(self.centralwidget)
self.pushButton_4.setObjectName(_fromUtf8("pushButton_4"))
self.horizontalLayout_2.addWidget(self.pushButton_4)
self.pushButton_4.clicked.connect(self.csv_button)
####
def csv_button(self):
import csv
conn = sqlite3.connect('FamilyFinance_test.db')
c=conn.cursor()
myrow_in = c.execute("select * from Income_test order by date desc")
with open('Income_test.csv', 'wb') as csvfile_in:
s_in = csv.writer(csvfile_in, delimiter=' ')
s_in.writerow(['Date']+['Income'])
for i in myrow_in:
s_in.writerow([str(i[0])]+[str(i[1])])
myrow_out = c.execute("select * from Outcome_test order by date desc")
with open('Outcome_test.csv', 'wb') as csvfile_out:
s_out = csv.writer(csvfile_out, delimiter=' ')
s_out.writerow(['Date']+['ATM']+['Spent']+['Reason']+['Category'])
for j in myrow_out:
s_out.writerow([str(j[0])]+[str(j[1])]+[str(j[2])]+[str(j[3])]+[str(j[4])])
os.system("start "+'Income_test.csv')
os.system("start "+'Outcome_test.csv')
Within python itself this function works fine, as well as with .exe created with py2exe.
However, after successful creation of installer by InnoSetup and installing the application, i find that the very same button does not work.
Can someone give direction for resolving this problem?
Is there something to be done additionally with InnoSetup compiler?

perhaps your InnoSetup install your program into C:\Program Files (x86) which requires UAC elevation to write into the folder.
So, maybe either change your installation folder to some User folders or package your application with UAC option in py2exe which is explained here https://stackoverflow.com/a/1445547/566035.

icons in PyQt not showing properly

I have developed an app with system Tray having menu in Python 2.6.4 and PyQt4.
Every client system has python installed locally, and accessing PyQt4 from network location.
I set SystemTray and required icons for menu items as below.
App folder has icons folder from where i am using. so i used os.getcwd()
i kept this app folder in a network so that everyone can access.
self.mnuItem_1 = QtGui.QAction(QtGui.QIcon(r'%s\icons\icon1.ico' % (os.getcwd())), "Menu Item 1", self)
self.mnuItem_2 = QtGui.QAction(QtGui.QIcon(r'%s\icons\icon1.ico' % (os.getcwd())), "Menu Item 1", self)
self.trayIconMenu = QtGui.QMenu(self)
self.trayIconMenu.addAction(self.mnuItem_1)
self.trayIconMenu.addAction(self.mnuItem_2)
self.trayIcon = QtGui.QSystemTrayIcon(self)
self.trayIcon.setContextMenu(self.trayIconMenu)
TrayIcon = (r'%s\ShowTime_Addons\Media\showtimeIcon.ico' % (os.getcwd()))
self.trayIcon.setIcon(QtGui.QIcon(TrayIcon))
self.trayIcon.setToolTip('Showtime')
self.trayIcon.show()
In some systems i could able to see the icons, but in some systems icons are not shown.
For testing i placed .png and used and it worked.
self.mnuItem_1 = QtGui.QAction(QtGui.QIcon(r'%s\icons\icon1.png' % (os.getcwd())), "Menu Item 1", self)
self.mnuItem_2 = QtGui.QAction(QtGui.QIcon(r'%s\icons\icon1.png' % (os.getcwd())), "Menu Item 1", self)
So came to an understanding that the issue is not with the path but something else.

No sure this is the solution, but try to not use os.getcwd() which gives you the current working directory and it might differ from your application directory. To determine application directory, use:
base_dir = os.path.dirname(os.path.abspath(__file__))
Then use base_dir instead of os.getcwd() or do:
os.chdir(base_dir)

I found out a solution for this scenario
One approach is to set the paths in qt.config file and place this in the location of your executable.(In my case its C:\Python26)
As i discribed in my Question that i am accessing PyQt4 from Network Location say \\somesystem\Share\PyQt4
We will find a qt.config file in \\somesystem\Share\PyQt4
Take it and put this below lines in qt.conf
[Paths]
Prefix = //somesystem/Share/PyQt4
Binaries = //somesystem/Share/PyQt4
Everything works fine, even sqldrivers will be loaded. No Need of using app.addLibraryPath