Python Variable in tkinter window - python-3.x

I am building a device that counts how many parts are made off a machine and then turns the machine off at a specific number. I am using an Arduino for all the I/O work and then importing the serial data into Python as variable partCount. I would like to create a simple GUI in tkinter to show the number of parts that have been made and the total number needed. The problem is that I keep getting an error on the label lines that include a variable instead of just a text. I've done a lot of research on it, but I just can't get it for some reason. Any advice would be appreciated.
import serial
import csv
import datetime
import tkinter
#Part Variables
partNumber = "A-33693" #Part Number
stockupTotal = 10
arduinoSerialData = serial.Serial('com3',9600) #Serial Variable
now = datetime.datetime.now()
#GUI
window = tkinter.Tk()
window.title("Troy Screw Products")
titleLabel = tkinter.Label(window, text="Davenport Machine Control")
partNumberLabel = tkinter.Label(window, text="Part #:")
stockUpTotalLabel = tkinter.Label(window, text="Stockup Total:")
partCountLabel = tkinter.Label(window, text="Current Part Count:")
partNumberInfo = tkinter.Label(window, partNumber)
stockUpTotalInfo = tkinter.Label(window, stockupTotal)
partCountInfo = tkinter.Label(window, partCount)
titleLabel.pack()
partNumberLabel.pack()
partNumberInfo.pack()
stockUpTotalLabel.pack()
stockUpTotalInfo.pack()
partCountLabel.pack()
partCountInfo.pack()
window.mainloop()
#Write to CSV File
def writeCsv():
with open("machineRunData.csv", "a") as machineData:
machineDataWriter = csv.writer(machineData)
machineDataWriter.writerow([partNumber, "Stockup Complete",now.strftime("%Y-%m-%d %H:%M")])
machineData.close()
#Serial Import
while (1==1):
if (arduinoSerialData.inWaiting()>0):
partCount = arduinoSerialData.readline()
partCount = int(partCount)
if partCount == 999999:
writeCsv()
print(partCount)

There are several options you can give to a Label widget, as you can see here. You should specify all parameters after the first by name:
partNumberInfo = tkinter.Label(window, text=PartNumber)
To use Python variables in Tkinter you need to special Tk objects, of which there are four: BooleanVar, DoubleVar, IntVar, and StringVar. See this answer for a good example.

So after a ton of research over the last week, I found a solution. The problem was that the program would run the GUI, but not run the code for the serial import until the GUI window was closed. I needed a way to get both the GUI running and updated and get the serial data importing at the same time. I resolved this by creating a thread for both operations. There's probably an easier way to do this, but this what I came up with. The code is below for anyone having a similar problem.
import serial
import time
import threading
from tkinter import *
#Part Variables
partNumber = "A-33693" #Part Number
stockupTotal = 10
partCount = 0
def countingModule():
global partCount
while (1==1):
time.sleep(2)
partCount += 1
print(partCount)
def gui():
global partCount
root = Tk()
pc = IntVar()
pc.set(partCount)
titleLabel = Label(root, text="Machine Control")
partNumberLabel = Label(root, text="Part #:")
stockUpTotalLabel = Label(root, text="Stockup Total:")
partCountLabel = Label(root, text="Current Part Count:")
partNumberInfo = Label(root, text=partNumber)
stockUpTotalInfo = Label(root, text=stockupTotal)
partCountInfo = Label(root, textvariable=pc)
titleLabel.pack()
partNumberLabel.pack()
partNumberInfo.pack()
stockUpTotalLabel.pack()
stockUpTotalInfo.pack()
partCountLabel.pack()
partCountInfo.pack()
def updateCount():
pc.set(partCount)
root.after(1, updateCount)
root.after(1, updateCount)
root.mainloop()
op1 = threading.Thread(target = countingModule)
op2 = threading.Thread(target = gui)
op1.start()
op2.start()

Related

NameError: name 'Acte_D ' is not defined

I am currently developing a program to try an xml file. However I encounter a problem that has been blocking me for a few days now and I can rack my brains my beginner level in python and my many research does not help me to get over it.
I first try to retrieve 1 element from my xml file. I can do it well only the graphics window that should normally display it does not generate and I have the following error message:
The error :
window.fenetre_text(Acte_D) NameError: name 'Acte_D' is not defined`
well my code is :
import tkinter as tk
from tkinter import *
from tkinter import messagebox
from tkinter.filedialog import askopenfilename
from xml.dom import minidom`
global file
global Acte_D
global element_A
global lines
class fenetreM(Tk):
#GUI
def __init__(self, master=None,*args, **kwargs):
Tk.__init__(self,master, *args, **kwargs)
self.menu_bar()
self.title("EssaiV1.0.1")
self.geometry("800x400")
self.minsize(380,140)
self.config(background='#F0F0F2')
#New_frame=Frame(fenetreM, bg='#abd7f4')`
def menu_bar(self):
menu_bar = Menu(self)
menu_file = Menu(menu_bar, tearoff=0)
menu_file.add_command(label="Open", underline=0, command=self.open_file)
menu_file.add_command(label="Affichage",underline=0,command=self.do_something)
menu_file.add_separator()
menu_file.add_command(label="Exit",underline=1,command=self.quit)
menu_bar.add_cascade(label="File",underline=0, menu=menu_file)
menu_help = Menu(menu_bar, tearoff=0)
menu_help.add_command(label="About", command=self.do_about)
menu_bar.add_cascade(label="Help",underline=0, menu=menu_help)
self.config(menu=menu_bar)
valid = False
return(valid)
def open_file(self):
types = [("All Files",".*")]
file = askopenfilename(title="File to open : ", filetypes=types)
print("Copy")
doc = minidom.parse(file)
print(doc.nodeName)
print(doc.firstChild.tagName)
Acte_D = doc.getElementsByTagName("ActeDescription")
print("\n")
element_A = (f" we have {Acte_D.length} element \n Version : ")
for i in Acte_D:
screen_1=(i.getAttribute("version"))
print(screen_1)
print("\n")
return (Acte_D)
def fenetre_text(self,Acte_D):
tk=Text(fenetreM, height = 10, width =100)
Fenetre_A=tk.inset(END,textvariable=self.element_A+Acte_D)
Fenetre_A.pack(side="top", fill="x", expand=True)
return(Acte_D)
window = fenetreM()
window.fenetre_text(Acte_D)
window.mainloop()
Can someone explain my mistake to me?
Thanks
I tried to graphically display the result of Acte_D in my window defined in my method fenetre_text.
But I can't.

Missing Argument / issues opening GUI program on macOS Big Sur

This is my first GUI program and I am having some major issues. I really need some help. First, I cannot get the program to open on my computer (mac). When running in Idle IDE I get this error message: import Tkinter
ModuleNotFoundError: No module named 'Tkinter'.
I have 3.9 installed which I thought had a GUI interface.
When debugging in VS Code i get this error message # line 44:
Exception has occurred: TypeError
init() takes at least 4 arguments (3 given)
I think I have 4
I'm not sure where to begin with these issues. From my research it appears that there is an issue running GUI programs on macs updated higher then 11.1.
Code is below
# Create a Tkinter GUI program that converts Celsius Temp to Fahrenheit
# F == Fahrenheit
# C == Celsius
# Tkinter imported
import Tkinter
# Global variable used
temp_val = 'Celsius'
#Set value for drop down menu
def store_temp (set_temp):
global temp_val
temp_Val = set_temp
class TemperatureConverter:
def __init__(self):
# create main window
self.main_window = Tkinter.Tk()
# create a title for window
self.main_window.title('Temperature Converter')
# create three frames
self.top_frame = Tkinter.Frame()
self.option_frame = Tkinter.Frame()
self.mid_frame = Tkinter.Frame()
self.bottom_frame = Tkinter.Frame()
#create widget for top frame
self.prompt_label = Tkinter.Label(self.top_frame, text= 'Enter a temperature in Celsius: ')
#pack top frame
self.prompt_label.pack(side='left')
# create str variable obj to hold empty string variable
self.inputNumber = Tkinter.StringVar()
self.var = Tkinter.StringVar()
# create widget for option drop down menu
self.entry = Tkinter.Entry(self.option_frame, textvariable=self.inputNumber )
self.dropDownList = ['Celsius','Fahrenheit']
self.drop_down = Tkinter.OptionMenu(self.option_frame, value=self.var , values=self.dropDownList, command=store_temp)
self.var.set(dropDownList[0])
# option widgets packed
self.entry.pack(side='right')
self.dropDownList.pack(side='left')
#create widget for middle frame
self.result_label = Tkinter.Label(self.mid_frame)
# create widgets for bottom frame
self.call_convert = (call_convert , result_label, inputNumber)
self.convert_button = Tkinter.Button(self.bottom_frame, text='Convert', command=self.call_convert)
self.quit_button= Tkinter.Button(self.bottom_frame, text= 'Quit', command= self.main_window.destroy)
#pack the buttons
self.convert_button.pack(side='left')
self.quit_button.pack(side='left')
#pack the frames
self.top_frame.pack()
self.option_frame.pack()
self.mid_frame.pack()
self.bottom_frame.pack()
#Enter the tkinter main loop
Tkinter.mainloop()
# convert method is callback fucntion for convert button
def call_convert(self):
if temp_Val == 'Celsius':
f = float((float(temp)* 9/5)+32)
self.result_label.config(text='The temperature in Fahrenhiet is:')
if temp_Val == 'Fahrenheit':
c = float((float(temp)-32) * 5 / 9)
self.result_label.config(text='The temperature in Celsius is:')
if __name__ == '__main__':
temp_converter = TemperatureConverter()
There were a lot of bugs in your code. I fixed all of them (I think). I had to guess where you wanted to put the label with the results. I also had to fix all of the indentations. This is the working code:
# Create a tkinter GUI program that converts Celsius Temp to Fahrenheit
# F == Fahrenheit
# C == Celsius
# tkinter imported
import tkinter
class TemperatureConverter:
def __init__(self):
# create main window
self.main_window = tkinter.Tk()
# create a title for window
self.main_window.title("Temperature Converter")
# create three frames
self.top_frame = tkinter.Frame(self.main_window)
self.option_frame = tkinter.Frame(self.main_window)
self.mid_frame = tkinter.Frame(self.main_window)
self.bottom_frame = tkinter.Frame(self.main_window)
# create widget for top frame
self.prompt_label = tkinter.Label(self.top_frame, text="Enter a temperature in Celsius:")
# pack top frame
self.prompt_label.pack(side="left")
# create str variable obj to hold empty string variable
self.inputNumber = tkinter.StringVar(self.main_window)
self.var = tkinter.StringVar()
# create widget for option drop down menu
self.entry = tkinter.Entry(self.option_frame, textvariable=self.inputNumber)
self.dropDownList = ["Celsius", "Fahrenheit"]
self.drop_down = tkinter.OptionMenu(self.option_frame, self.var, *self.dropDownList)
self.var.set(self.dropDownList[0])
# option widgets packed
self.entry.pack(side="right")
self.drop_down.pack(side="left")
# create widget for middle frame
self.result_label = tkinter.Label(self.mid_frame)
# create widgets for bottom frame
self.convert_button = tkinter.Button(self.bottom_frame, text="Convert", command=self.call_convert)
self.quit_button= tkinter.Button(self.bottom_frame, text= "Quit", command=self.main_window.destroy)
# pack the buttons
self.convert_button.pack(side="left")
self.quit_button.pack(side="left")
# pack the frames
self.top_frame.pack()
self.option_frame.pack()
self.mid_frame.pack()
self.bottom_frame.pack()
# It is better to call `<tkinter.Tk>.mainloop()`
self.main_window.mainloop()
# convert method is callback fucntion for convert button
def call_convert(self):
if self.var.get() == "Celsius":
f = float((float(self.entry.get())* 9/5)+32)
self.result_label.config(text="The temperature in Fahrenhiet is: "+str(f))
if self.var.get() == "Fahrenheit":
c = float((float(self.entry.get())-32) * 5 / 9)
self.result_label.config(text="The temperature in Celsius is: "+str(c))
self.result_label.pack(side="bottom")
if __name__ == "__main__":
temp_converter = TemperatureConverter()
Look at what I did for the OptionMenu and look at how I fixed you call_convert function. If you have any specific questions, tell me and I will try to answer them.
By the way I don't think any of the errors you were getting were caoused by your OS. Also I suggest that next time you use import tkinter as tk as it will make it way easier to write code.

Making a flashing text in tinker

I want a text that flashes with a clock's seconds. This Link was helpful, but couldn't solve my problem. Below is my little working code:
from tkinter import *
from datetime import datetime
import datetime as dt
import time
def change_color():
curtime=''
newtime = time.strftime('%H:%M:%S')
if newtime != curtime:
curtime = dt.date.today().strftime("%B")[:3]+", "+dt.datetime.now().strftime("%d")+"\n"+newtime
clock.config(text=curtime)
clock.after(200, change_color)
flash_colours=('black', 'red')
for i in range(0, len(flash_colours)):
print("{0}".format(flash_colours[i]))
flashing_text.config(foreground="{0}".format(flash_colours[i]))
root = Tk()
clock = Label(root, text="clock")
clock.pack()
flashing_text = Label(root, text="Flashing text")
flashing_text.pack()
change_color()
root.mainloop()
This line of code: print("{0}".format(flash_colours[i])) prints the alternating colors on the console as the function calls itself every 200s. But the flashing_text Label's text foreground doesn't change colors.
Does anybody have a solution to this problem? Thanks!
Please forgive my bad coding.
Although you have changed the color of the flashing_text in the for loop twice, but the tkinter event handler (mainloop()) can only process the changes when it takes back the control after change_color() completed. So you can only see the flashing_text in red (the last color change).
To achieve the goal, you need to change the color once in the change_color(). Below is a modified change_color():
def change_color(color_idx=0, pasttime=None):
newtime = time.strftime('%H:%M:%S')
if newtime != pasttime:
curtime = dt.date.today().strftime("%B")[:3]+", "+dt.datetime.now().strftime("%d")+"\n"+newtime
clock.config(text=curtime)
flash_colors = ('black', 'red')
flashing_text.config(foreground=flash_colors[color_idx])
clock.after(200, change_color, 1-color_idx, newtime)
I would add it to a class so you can share your variables from each callback.
So something like this.
from tkinter import *
from datetime import datetime
import datetime as dt
import time
class Clock:
def __init__(self, colors):
self.root = Tk()
self.clock = Label(self.root, text="clock")
self.clock.pack()
self.flashing_text = Label(self.root, text="Flashing text")
self.flashing_text.pack()
self.curtime = time.strftime('%H:%M:%S')
self.flash_colours = colors
self.current_colour = 0
self.change_color()
self.root.mainloop()
def change_color(self):
self.newtime = time.strftime('%H:%M:%S')
if self.newtime != self.curtime:
if not self.current_colour:
self.current_colour = 1
else:
self.current_colour = 0
self.curtime = time.strftime('%H:%M:%S')
self.flashing_text.config(foreground="{0}".format(self.flash_colours[self.current_colour]))
self.clock.config(text=self.curtime)
self.clock.after(200, self.change_color)
if __name__ == '__main__':
clock = Clock(('black', 'red'))

Bug appears when writing file from tkinter module

import tkinter as tk
class Application(tk.Frame):
def __init__(self, master=None):
super().__init__(master)
self.pack()
self.create_widgets()
def create_widgets(self):
self.hi_there = tk.Button(self)
self.hi_there["text"] = "Done!\n(click me)"
self.hi_there["command"] = self.say_hi
self.hi_there.pack(side="top")
self.entrythingy = tk.Entry()
self.entrythingy2 = tk.Entry()
self.entrythingy.pack()
self.entrythingy2.pack()
# here is the application variable
self.contents = tk.StringVar()
self.contents2 = tk.StringVar()
# set it to some value
self.contents.set("stdio")
self.contents2.set("script name")
# tell the entry widget to watch this variable
self.entrythingy["textvariable"] = self.contents
self.entrythingy2["textvariable"] = self.contents2
self.text = tk.Text()
self.text.pack()
# and here we get a callback when the user hits return.
# we will have the program print out the value of the
# application variable when the user hits return
self.entrythingy.bind('<Key-Return>',
self.print_contents)
self.quit = tk.Button(self, text="QUIT", fg="red",
command=root.destroy)
self.quit.pack(side="bottom")
def say_hi(self):
#print("hi there, everyone!")
self.fn = self.contents2.get()
self.body = self.text.get(1.0, tk.END).split('\n')
#print('Self.body:\n',self.body)
self.libs = self.contents.get().split(' ')
self.make_c()
def make_c(self):
lib_text = ''
for i in self.libs:
lib_text += "#include <lib.h>\n".replace('lib', i)
body_text = "int main() {\n\t"+"\n\t".join(self.body)+"return 0\n}"
print(lib_text+body_text)
with open(self.fn+'.c', 'w+') as f:
f.write(lib_text+body_text)
print('File written!')
from subprocess import call
call(['gcc',self.fn+'.c', '-o', self.fn])
def print_contents(self, event):
print("hi. contents of entry is now ---->",
self.contents.get())
#self.contents.set("")
#def
root = tk.Tk()
app = Application(master=root)
app.mainloop()
Those are the my code, which tries to make a c file and convert it. The problem is, when I convert it once, it is working fine, but when I change the content of the text box, the file doesn't change, and I don't understand why. I am sure that I put in the new file content, because it prints before it writes. Also, it appears that when I try to write files independent from tkinter, it works just the way I want it to.
I think there is some mechanism that I am not aware of in TK, or there is a bug. Please help me out, thanks.
I solved it. It doesn't compile again due to the error in it when I added return 0, without semicolon. So, when I click the executable file, it shows the old program. I added the semicolon, and now it is fine. Thx everyone!

Stop a working function with a button (Python, Tkinter)

I have a little situation with Tkinter. I have a piece of code that constantly receives raw EMG data from Thalmic`s Myo Armband and writes that data (plus the name of a gesture) to a csv file. I designed a little tkinter interface to make it look more user-friendly. What I need is to write a function that will stop the previously started recording function.
Also I have a problem with the label, that shows the number of rows in a csv file, but it is another question.
Here is the code:
from gesture_classificator import MyoRaw
import csv
import tkinter
import tkinter.messagebox
import sys
root = tkinter.Tk()
root.title("Recording data")
m = MyoRaw(sys.argv[1] if len(sys.argv) >= 2 else None)
v = tkinter.StringVar()
entry = tkinter.Entry(root, textvariable=v)
entry.grid(row=0, column=0)
v.set("")
def process_emg(emg, times):
name = v.get()
with open('own_test.csv', 'a+') as file:
writing = csv.writer(file)
writing.writerow(emg+(name,))
def show_row_count():
with open('own_test.csv', 'r') as return_me_the_row_count:
reading = csv.reader(return_me_the_row_count)
data = list(reading)
row_count = len(data)
return row_count
def start_recording():
m.add_emg_handler(process_emg)
m.connect()
def stop_recording():
???
B1 = tkinter.Button(root, text="Start the recording", command=start_recording)
B2 = tkinter.Button(root, text="Stop the recording", command=stop_recording)
rows_number = tkinter.Label(root, text=show_row_count)
rows_number.config(text=show_row_count)
B1.grid(row=1, column=0)
B2.grid(row=1, column=1)
rows_number.grid(row=0, column=1)
root.mainloop()
try:
while True:
m.run(1)
except SystemExit:
pass
finally:
m.disconnect()
According to the MyoRaw code, you would probably like the function MyoRaw.disconnect(), which you would use like this:
def stop_recording():
m.disconnect()
In such cases it would be easier and faster for you to check the documentation and/or the code of the framework you are using.

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