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Questions tagged [python-3]

Use this tag when referring to the Python 3 language. This can include discussions about specific features unique to the language or perhaps when referring to software that requires Python 3 in order to function. Note that general programming questions are often better suited to Stack Overflow; use this tag only where directly relevant to the Pi.

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10 views

Pygame initalisation for TFT on /dev/fb1 only succeeds as root

I connected a 320x240 TFT to my Raspberry Pi A+ running Raspbian stretch via SPI and set it up as fbtft_device. It shows up in /dev/fb1 and I can write images to it via pygame. I initialize it like ...
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0answers
19 views

How can I install/use smptlib in Python 3.x with Thonny

I have got this response. I have no idea how to avoid it: Traceback (most recent call last): File "/home/pi/Franz/email3.py", line 2, in <module> import smtplib File "/usr/lib/python3/...
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votes
0answers
25 views

MQTT connection to broker

Hello I would like to configure paho mqtt but I am having trouble to get it to work properly. I am trying to connect my raspberry to external server where broker is up and running. Port and IP are ...
1
vote
1answer
32 views

JSON not working with LIRC

I have the following script which is meant to write/read a json file. The problem is it will only write/read the file from the command line and not when using a remote via LIRC. import RPi.GPIO as ...
0
votes
1answer
62 views

prevent script running twice consecutively - Python

I have the following two Python scripts one sends a motor forward while the other script sends it backwards. Each script is operated by it's own button on a remote. Script A import RPi.GPIO as GPIO ...
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votes
0answers
33 views

I need help coding a toggle button for led? [duplicate]

I have hooked up my circuit and it works as a hold button to turn light on. Then when I let go of button light turns off but I have found no way to make a toggle button for led. If somebody were so ...
0
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0answers
16 views

Gpiozero inside custom function

So I have a odd problem. I have raspberry pi model 3 using gpiozero in python 3. Just trying to turn on the motor at half speed when calling the function. Issue is that nothing happens when ...
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2answers
53 views

How to make a button toggle a led?

I have some code which turns an led on when I hold the button. But only when I am pressing it. Could somebody help me so when I press the button then the light stays on and if I press it again the led ...
0
votes
1answer
20 views

Need help blinking a led continuously?

I'm new to Python and just go this Raspberry Pi, and need help blinking this led. I have got it to where the LED will blink once( Turn on for a second, then turn off). I need some help so when I hit ...
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0answers
29 views

Not able to install the latest version of Scipy(1.2.0) on Raspbian

I have Scipy version 0.18.2 on my RaspberryPi 3. However, I need the find_peaks() function which is only available on higher versions. I followed this link to install scipy. But the python3 setup.py ...
2
votes
1answer
38 views

read variable and trigger event - python

I have the following script which increases the counter variable every time a button is pressed. When counter reaches a certain number i.e. 10 lets say I want an event to trigger. from time import ...
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0answers
52 views

Installing gstreamer on raspian

I am trying to compile gstreamer 1.14.4 to take advantage of the webrtc module. I was able to successfully compile it using cerbero on my raspberry pi but I have an issue where when testing my webrtc ...
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0answers
24 views

real time voice to qrcode using pyhton

How to convert audio signals to QRcode using raspberry using python.I want to record the voice using a microphone and convert it into QRcode.When I scan the QRcode the audio should be played.I have ...
1
vote
1answer
34 views

Running a Python Script with Tensorflow via systemd doesn't work, but running the same script via the terminal works

I have successfully coded a Python 3 Script that detects objects in a frame given my the camera. Based on those objects detected, I run commands and logic. I have tested this and I can run it via the ...
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0answers
53 views

problem connecting with port serial0 for serial comm

I am facing this issue that I can't solve, I've been on this like 3 days and it is really frustrating! I'm trying to test AT commands through port serial0, I've tried it in a python file and when i ...
0
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1answer
38 views

How can hide ffmpeg output?

os.system('ffmpeg -ss 00:08:00 -i '+dAdi+' -frames:v 1 /home/pi/Desktop/filmekrangoruntuleri/'+egAdi+'2.jpg') When I run my python(3) script through the terminal, I see the following outputs produced ...
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0answers
43 views

Using Python smbus to communicate with Smart Battery

Getting I/O errors when using Python 3 smbus module under Raspbian to retrieve (read) data back from a laptop Smart Battery. A similar program coded in C for Arduino works perfectly with this battery. ...
0
votes
1answer
25 views

Is in Python anything like in Java platform.exit() to leave the program [closed]

I got a Button and when the Button was tapped it runs a function. Till here I got everything ready. And now my question I will close the program correct like in the title. Is in Python anything like ...
1
vote
1answer
113 views

Upgrading to Latest Numpy Version on Raspberry Pi 3

I'm not sure if this is a Raspberry Pi issue, Raspbian Issue, Python Issue, or all of the above. So forgive me if this is the wrong place to ask this. I just got me a Raspberry Pi 3B+ and installed ...
-1
votes
0answers
16 views

Raspberry Pi define the USB port currently plugin to apply on Python

How to define the USB port that currently plugins on Raspberry Pi, because the currently plugins on Raspberry Pi is the 2 current RFID, keyboard and mouse. I would like to get the ports of RFIDs to ...
-1
votes
0answers
14 views

suddently raspbery pi shutdown or random long delay when running stepper motor using pigpiod

So I create an another program that can run stepper motor nema 34 using leadshine DM860 driver and this is the example of my code: import time import pigpio START_DELAY=580 FINAL_DELAY=480 STEP=1 ...
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2answers
76 views

AttributeError: 'NoneType' object has no attribute 'send' pigpiod

So I create an another program that can run stepper motor clockwise and counter clockwise with a ramp up and ramp down in there and adding limiter switch on GPIO 16 and 26 to stop the pi....
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0answers
136 views

ImportError: libQtTest.so.4:

I was installing opencv on Raspberry and it was finished and import cv2 worked in Terminal.But when i running following code it gave the error import cv2 ImportError: No module named cv2 import ...
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2answers
20 views

Program not able to open file at start up but when running from command line, runs as expected

using a library from https://github.com/BLavery/LIBtft144 this line of code doesn't seem to run when I run the program from a systemd. I also tried calling it from a crontab call of my .py program. ...
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1answer
34 views

GPIO LED Python

I am not sure what I am doing wrong here. I found this guide on but it's not working for me. The program does not output any errors but the LED doesn't light up. I have and LED with + on GPIO 12 ...
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2answers
555 views

Installing Python 2.7

I am new to the Raspberry Pi, I have a project. I would like to work on Python 2 not Python 3. By default Python 3 is installed on my Pi. I want to change or remove this version and I want to ...
-2
votes
1answer
38 views

Run a fan 5scs long GPIO

def fan_on(): GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) FAN_PIN = 23 GPIO.setup(FAN_PIN,GPIO.OUT) GPIO.output(FAN_PIN,True) This is my code to run a fan on my rpi via GPIO ...
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0answers
27 views

DC Motors Not Moving, Programming or Wiring Error?

I got a Raspberry Pi 3B, That ive hooked 4 DC motors up to (with a motor controller of course). I run the program and they do not move, i cant figure out if im missing something or wired something up ...
-1
votes
0answers
69 views

drawContours problem

This my code in python 3.5 but a have problem when running this code: import matplotlib.pyplot as plt import imutils import numpy as np import cv2 image=cv2.imread('/home/pi/Downloads/marquage-...
0
votes
1answer
62 views

pigpio python serial wave output not correct

I am trying to use joan's pigpio to write a serial command on my Rpi 3 gpio 14(UART0TX).My goal is to write a command from the pi to another device. When i send the command i do not see the ...
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1answer
42 views

cv2.line is not working in Rpi 3

model no: RPi 3 B Software: Python 3.5.3 Problem: I am using opencv 3.4 .I was trying to draw a line using function cv2.line().But it returns nothing.But the same code was working fine in my laptop ...
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0answers
36 views

Flask/Apache running @app.before_first_request twice

I have my raspberry pi running flask/Apache. I have a background task that I run using multiprocessing. (I know celery does this, but I just wanted something simple). My issue is that the background ...
-1
votes
0answers
12 views

video not saving at boot up

I am working on a project which a part of which is to capture a 5 second video in .h264 format and then convert it to .mp4 (I'm using subprocess for that). I have coded to see the preview of the video ...
0
votes
1answer
45 views

Installing library to raspberry pi problems

I'm trying to install a library to my RPi 3 B, but for some reason when I try to import it in my script, it won't recognize the library. This is the library: https://github.com/widgetlords/...
0
votes
1answer
85 views

Reading Real-Time Temperature of Raspberry Pi in Guizero

Is there an option to display Raspberry Pi's internal temperature value to be able to display it into Guizero UI? I saw this source code on GitHub, but this only displays random float numbers in the ...
0
votes
1answer
178 views

Stream Deck Using PI 2

I have a RPi2 1gb. I've recently got a touch screen for it and have decided that I actually should use it for what it was intended for. Programming! So my adventure starts here. I want to make a ...
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0answers
49 views

GSM/GPRS SIM800L working in England,UK

I am from England and I am using SIM800L Module for sending the SMS. My module is not connecting with the network. I don't know what's the issue, I wanna know whether this module (SIM800L) works in ...
0
votes
0answers
47 views

AttributeError: ge_add_event_data

I get this error when i try to import pynput to control my motor using keyboard: Traceback (most recent call last): File "/home/pi/.local/lib/python3.5/site-packages/Xlib/display.py", line 224, in ...
1
vote
0answers
42 views

Pi-3, Model B, SenseHat - How can I restart my code while it's active.?

I am new with python and PI. I have been looking all over for information about this but with no luck. currently it works like this: I start the program, I press the button and then it starts counting ...
0
votes
1answer
35 views

Tkinterhtml fails to run on raspbian. Python 3.7

Tkinterhtml fails to run on Raspbian. Python 3.7 _tkinter.TclError: couldn't load file "/usr/local/lib/python3.7/site-packages/tkinterhtml/tkhtml/Linux/32-bit/Tkhtml/libTkhtml3.0.so": /usr/local/lib/...
0
votes
2answers
35 views

Is it possible to find the current sampling rate of MCP3008? [closed]

I am using MCP3008 with Raspberrypi Model B. MCP3008 is sampling the analog signal. But is there any way through which I can verify if it is correct or not. For example, I need a sampling rate of 1.5 ...
0
votes
0answers
18 views

Is it possible to use half the screen as touch screen and the other half as a waveform display pane?

I am using waveshare 3.5 inch RPi LCD (A). Is it possible to use it as just a display for waveforms and half the screen of it responsive to the touch?
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votes
0answers
79 views

Running python in PHP shows error. -sudo: no tty present and no askpass program specified

I want to run a python script to turn an led on from PHP. The script did not run. I used echo to print the error. It said "sudo: no tty present and no askpass program specified". What should I do? ...
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2answers
78 views

crontab schedule .py file

I am attempting to run a scheduled .py file every 5 minutes with crontab but I don't think it's working. I'm following this post with the instructions: Can't run python script from cron I opened ...
1
vote
2answers
258 views

open a terminal on boot and auto-run a looping python script

When my RPI3 is booted, I would like it to automatically have the terminal open with my python script already running. Note that it loops endlessly. I want to open the terminal so I check the output ...
1
vote
1answer
119 views

Python script not running when added to crontab

I have an on_reboot.sh file that contains the following: #!/bin/bash source /home/pi/.profile workon cv cd /home/pi/reboot python pi_test.py After that I made the file executable using $ chmod +x ...
1
vote
1answer
843 views

How to fix Remote I/O Error Whilst Using i2c OLED

I was using my i2c OLED perfectly well when seemingly for no reason I started getting the Remote I/O Error when I ran my Python program. For some reason this was fixed by installing i2c tools again. ...
0
votes
1answer
41 views

Picamera (in Terminal and Python 3) just does nothing

I have a Picamera V2, a brand new Flex Cable (so that's not the problem) and a Pi 3B. I am using VNC from Ubuntu. The Pi connects OK. But in the terminal (raspistill - o hi.jpg) and in Python 3 ( ...
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votes
1answer
35 views

python basic problem in developing raspberry pi 3 GPIO skill

this is a part of a code for picroft skill: def handle_command_intent(self, message): if message.data["command"].upper() == "BLINK": self.speak_dialog("ledblink") the "data" and "...
0
votes
1answer
33 views

Run python function once usb is mounted [closed]

I'm currently having a problem on how can I run a python function once the user mounts a flash drive. I have a GUI that's in idle mode and the user can start using when he/she plugs a flash drive. ...