We Keep Coding

Why does Win 7 make a beep when I run a Python script?

I have seen a few question asking how to make a Python script that makes a beep sound.
This question is not about that.
When I run certain Python scripts Windows 7 makes a beep sound but I want to stop the beep.. or at least understand why it's happening.
Here is a test script - test.py:
#!/usr/bin/python
# importing modules
import os
import time
import datetime
from datetime import datetime
def f_log(strtext):
# In this method try and write to the log file
logFilePath = '/home/osmc/python/pyscripter_file.txt'
ts_local = datetime.now()
ts = ts_local.strftime("%d/%b/%Y %H:%M:%S")
try:
# Check if the logfile exists
if(os.path.isfile(logFilePath)):
# Append the error message to the log file. 'a+' creates the file if it does not exist.
with open(logFilePath, 'a+') as f:
f.write(ts + '\t' + strtext + '\n')
else:
print("Log File does not exist - Creating File now")
with open(logFilePath, 'a+') as f:
f.write(ts + '\t' + 'Log File does not exist - Creating File now' + '\n')
f.write(ts + '\t' + strtext + '\n')
except IOError as e:
# Handle the exception
print("Error Msg")
f_log("Test Script")
print("Hello World")
This script is in a directory on a Raspberry Pi running OSMC... in a folder called /home/osmc/python
I have opened it as a remote file in the Pyscripter IDE and can see ssh://osmc//home/osmc/python/test.py
So this means, the Pyscripter IDE, running on Windows 7, is running the Python script on the remote machine. When I run the script this way I get a beep when it finishes executing.
If I create a crontab to run it in osmc...
PATH=/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/usr/bin/python
53 22 * * * /usr/bin/python /home/osmc/python/test.py >> out.txt 2>&1
Then the script also gives a beep at the end of execution.
If I run the script from a command line to osmc (from an ssh connection in Putty)
# cd /home/osmc/python
# python test.py
I DO NOT get a beep when it completes.
If I run this next script in Pyscripter (or any other way) it does NOT make a beep.
import sys
print('Python '+sys.version.replace('\n','')+' at '+sys.executable+' on '+sys.platform)
Why do I sometimes get the beep? Something in the Python code in the first script I guess?
Flex

My test Python script writes to a log file. I had that log file open in PyScripter IDE.
PyScripter IDE by design makes a beep to signal a File Change Notification affecting any files open in the IDE. This is what was causing the beep whether I was running the script from within PyScripter or not I was still getting the beep because the script was writing to the file open in PyScripter IDE.
I asked the developer and it is currently not possible to turn off this beep.
Flex

Python Script doesn´t work when started via other script

I´m currently working on a raspberry pi 4 and wrote a script in python that send a mail with a picture and then rename the file and puts it in another folder.
The script works fine when I start with command
sudo python script.py
but when start it with another script it won´t execute the part with the renaming
Now the question what is my mistake ?
import os
import time
from sendmail import mail
from sendmail import file_rename
from time import sleep
pic = '/home/pi/Monitor/Bewegung.jpg'
movie= '/home/pi/Monitor/Aufnahme.avi'
archiv = '/home/pi/Archiv/'
time = time.strftime('%d.%m.%Y %H:%M')
mail(filename = pic )
file_rename(oldname = pic ,name = 'Serverraum Bild' + time ,format = '.jpg' ,place = archiv )
file_rename(oldname = movie ,name = 'Serverraum Video' + time ,format = '.avi' ,place = archiv )

I see that you are starting the script as a user with sudo privileges.
but when start it with another script it won´t execute the part with the renaming
This makes me suspicious that the caller script does not have the correct permissions to rename/move a file. You can view the permissions of the script with the following command
ls -la callerscript.py

Cannot get #reboot Cron job to run Python script

I have a cron job that loads a Python script on reboot but it will just not work.
I have checked the Python script and that works fine from CLi.
The .py basically loads a browser to Google and then sends it to full screen.
(It actually loads another website and enters login details also, but removed for obvious reasons)
Been at this for weeks now and driving me crazy, any ideas?
Raspberry Pi running Raspbian.
$crontab -e
#reboot DISPLAY=:0 python /prtgboot.py
prtgboot.py
'#'!/usr/bin/env python
import commands
import time
webbrowser = "iceweasel"
pgrepcmd = "pgrep %s " % (webbrowser)
process = commands.getoutput(pgrepcmd)
if process == "":
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver import ActionChains
browser = webdriver.Firefox()
actions = ActionChains(browser)
browser.get('http://google.co.uk')
elemFullscreen = browser.find_element_by_tag_name('html')
time.sleep(30)
elemFullscreen.send_keys (Keys.F11)
exit()
else:
exit()

Ok, so Petesh was correct. It was #reboot not working correctly.
Changed the cron to * * * * * so my script runs every minute. Normally bad practice, but already setup script to end if browser already running. Working a treat now.
On a positive note, if the browser crashes it will start again for me :)

Python script failing from crontab

I've gone through multiple threads, but I still can't seem to find my problem.
I'm building a really simple Twitter bot that I'd like to fire every hour, on the hour with a cron job from a Raspberry Pi. Here's my crontab:
PYTHONPATH=/usr/bin/python
MAILTO=*myemail*
00 * * * * /home/username/directory/my_script.py >> /var/log/cron.log
Then the script:
#! /usr/bin/env python
import sys
from twython import Twython, TwythonError
from pymarkovchain import MarkovChain
#TWITTER ACCESS
apiKey = KEY
apiSecret = SECRET
accessToken = TOKEN
accessKey = KEY
#text to pull
text = open('/home/username/directory/text.txt').read()
#Generate database and frequency table
mc = MarkovChain('/home/username/directory/markov')
mc.generateDatabase(text)
tweet = mc.generateString()
api = Twython(apiKey,apiSecret,accessToken,accessKey)
try:
api.update_status(status=tweet)
except TwythonError as e:
print e
The first thing I checked was all of my referenced files to make sure they were absolute references. Then, I checked to make sure my file paths were correct. I'm really stumped here. Running the script from command line with the full path works as expected. Any thoughts are appreciated.

After trying the suggestions above and reading countless articles, I learned that cron has to run as root, not as the user. I checked the logs and saw that the user calling the script was the owner of the file, not root. So, running chmod a+x my_script.py took care of it.
Thanks for all the suggestions - especially those getting the errors to the correct log file.

To debug better, you might want to redirect stderr:
00 * * * * /home/username/directory/my_script.py >> /tmp/cron.log 2>&1
# or
00 * * * * /home/username/directory/my_script.py >> /tmp/cron.log 2>/tmp/cron-error.log
(I also changed the path there to make sure your cron user has permission to write output.)
Another thing you could try is run the script with Python in cron:
00 * * * * python /home/username/directory/my_script.py >> /tmp/cron.log 2>&1

Python script not work in crontab

Here is my script(randombg.py):
#!/usr/bin/env python
# -*- coding: utf8 -*-
import random
import subprocess
import os
BACKGROUND = '/home/david/wallpaper/dell2312'
IGNORE_FILES = ['/home/david/wallpaper/dell2312/.directory']
def enumerate():
global BACKGROUND
file_collections = []
for root, dirs, files in os.walk(BACKGROUND):
for file in files:
file_collections.append(os.path.join(root, file))
return file_collections
def randombg():
select_files = list(set(enumerate())-set(IGNORE_FILES))
subprocess.call(['feh', '--bg-scale', random.choice(select_files)])
def main():
while 1:
randombg()
if __name__ == '__main__':
main()
I have run chmod a+x randombg.py and it worked with python randombg.py .Let's say its path is /path/to/randombg.py. Also, run /path/to/randombg.py worked.
However, when I added it to crontab as below:
1 * * * * /path/to/randombg.py
or
01 * * * * python /path/to/randombg.py
or
01 * * * * /usr/bin/python /path/to/randombg.py
All failed.
I can't figure out. Could anyone explain?
PS: ArchLinux
More infomation
When I run ps aux|grep python, I can't find the randombg.py while sometimes it appears.
Addtional logs from crontab redirect stderr:
import: unable to open X server `' # error/import.c/ImportImageCommand/361.
import: unable to open X server `' # error/import.c/ImportImageCommand/361.
import: unable to open X server `' # error/import.c/ImportImageCommand/361.
/home/david/dotfiles/randombg.py: line 9: BACKGROUND: command not found
/home/david/dotfiles/randombg.py: line 10: IGNORE_FILES: command not found
/home/david/dotfiles/randombg.py: line 13: syntax error near unexpected token `('
/home/david/dotfiles/randombg.py: line 13: ` def enumerate():'

Try to change your subprocess.call to
subprocess.call("export DISPLAY=:0; feh --bg-scale " + random.choice(select_files), shell=True)
This should export the DISPLAY variable, as scripts run from crontab do not have access to environmental variables by default.