Develop Reference

Checking len of azure blob storage folder causes function to not run

Weird problem I've run into. I'm currently using the following code:
generic.py
def function_in_different_pyfile(input_folder):
# do stuff here
folder_1 = f"/folder_1"
folder_1_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_1)
folder_2 = f"/folder_2"
folder_2_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_2)
if len([file for file in folder_1_virtualdir]) !=(len([file for file in folder_2_virtualdir]):
generic.function_in_different_pyfile(folder_1_virtualdir)
else:
print('Already done')
So what I'm trying to do is:
Check the number of files in folder_1_virtualdir and folder_2_virtualdir
If they aren't equal, run the function.
If they are, then print statement/pass.
The problem:
The generic.function() runs although doesn't do anything when you pass in the list comprehension.
The generic.function() works totally fine if you don't have a list comprehension in the code e.g:
folder_1 = f"/folder_1"
folder_1_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_1)
folder_2 = f"/folder_2"
folder_2_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_2)
generic.function_in_different_pyfile(folder_1_virtualdir)
Will work completely fine.
There are no error messages. It passes through the function as if the function doesn't do anything.
What I've tried:
I've tested this by modifying the function:
generic.py
def function_in_different_pyfile(input_folder):
print('Start of the function')
# do stuff here
print('End of the function')
You will see these print statements although the function doesn't process any of the files in the input_folder argument if you include the list comprehension.
This is extended to when the list comprehension is ANYWHERE in the code:
folder_1 = f"/folder_1"
folder_1_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_1)
folder_1_contents = [file for file in folder_1_virtualdir]
folder_2 = f"/folder_2"
folder_2_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_2)
generic.function_in_different_pyfile(folder_1_virtualdir)
# Function doesn't run.
I'm fairly new to Python although can't seem to understand why the list comprehension here completely prevents the function from running correctly.

You could try the code if the number of files in the folder is less than 5000:
folder_1 = f"/folder_1"
folder_1_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_1)
folder_2 = f"/folder_2"
folder_2_virtualdir = CONTAINER_CLIENT.list_blobs(name_starts_with=folder_2)
folder_1_count = len(folder_1_virtualdir)
folder_2_count = len(folder_2_virtualdir)
if folder_1_count != folder_2_count :
generic.function_in_different_pyfile(folder_1_virtualdir)
else:
print('Already done')
If greater than 5000, you need to get the number iterating through your blob.
count = 0
for count, item in enumerate(blobs):
print("number", count + 1, "in the list is", item)

Mp3 player - the "file not found" messagebox.showerror shows up every time I play a song [duplicate]

The code below is a media player (mp3). It worked perfectly until I added the show_details() function which is supposed to show the length and timing of the song, the error message "file not found" appears when playing a file (The file does play! but the error message pops everytime). Once I take off the 3 lines consisting of 'a', 'total_length' and 'print' statements, the error stops to show up and the song of course plays normally. What is the problem with my code?
filelabel = Label(root, text="Let's make some noise!")
filelabel.pack(pady=10)
lengthlabel = Label(root, text="Total Length - 00:00")
lengthlabel.pack(pady=10)
def show_details():
filelabel['text'] = 'Playing - ' + os.path.basename(filename)
a = mixer.Sound(filename)
total_length = a.get_length()
print (total_length)
def play_music():
global paused
if paused:
mixer.music.unpause()
statusbar['text'] = 'Music Resumed: Playing ' + os.path.basename(filename)
paused = False
else:
try:
mixer.music.load(filename)
mixer.music.play()
statusbar['text'] = 'Playing - ' + os.path.basename(filename)
show_details()
except:
tkinter.messagebox.showerror('FIle not found', 'Melody could not find the song, please check again')

I see you create a music and sound object at the same time. This might be a clue to your answer:
How can I play multiple sounds at the same time in pygame?
It seems that adding channels might fix your problem. But take out these three lines first to see if they are the cause:
a = mixer.Sound(filename)
total_length = a.get_length()
print (total_length)

How to write data to a file every 10 seconds

I'm a JS dev trying to learn a bit of Python while working on a Raspberry-Pi3 project that reads data from a Bluetooth temperature sensor.
I need to write the data to my file.txt every 10 seconds, how could I do that please? I found similar topic here (Run certain code every n seconds ), but I don't know how to make it work in my current scenario.
#!/usr/bin/env python3
import argparse
import re
import logging
import sys
import time
from btlewrap import available_backends, BluepyBackend, GatttoolBackend, PygattBackend
from mitemp_bt.mitemp_bt_poller import MiTempBtPoller, \
MI_TEMPERATURE, MI_HUMIDITY, MI_BATTERY
def valid_mitemp_mac(mac, pat=re.compile(r"4C:65:A8:[0-9A-F]{2}:[0-9A-F]{2}:[0-9A-F]{2}")):
"""Check for valid mac adresses."""
if not pat.match(mac.upper()):
raise argparse.ArgumentTypeError('The MAC address "{}" seems to be in the wrong format'.format(mac))
return mac
def poll(args):
"""Poll data from the sensor."""
backend = _get_backend(args)
poller = MiTempBtPoller(args.mac, backend)
line1 = "Temperature: {}".format(poller.parameter_value(MI_TEMPERATURE))
line2 = "Humidity: {}".format(poller.parameter_value(MI_HUMIDITY))
print("Getting data from Mi Temperature and Humidity Sensor")
print("FW: {}".format(poller.firmware_version()))
print("Name: {}".format(poller.name()))
print("Battery: {}".format(poller.parameter_value(MI_BATTERY)))
print(line1)
print(line2)
f = open('file.txt', 'w')
f.write("%s \n %s \n" % (line1, line2))
f.close()
def _get_backend(args):
"""Extract the backend class from the command line arguments."""
if args.backend == 'gatttool':
backend = GatttoolBackend
elif args.backend == 'bluepy':
backend = BluepyBackend
elif args.backend == 'pygatt':
backend = PygattBackend
else:
raise Exception('unknown backend: {}'.format(args.backend))
return backend
def list_backends(_):
"""List all available backends."""
backends = [b.__name__ for b in available_backends()]
print('\n'.join(backends))
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--backend', choices=['gatttool', 'bluepy', 'pygatt'], default='gatttool')
parser.add_argument('-v', '--verbose', action='store_const', const=True)
subparsers = parser.add_subparsers(help='sub-command help', )
parser_poll = subparsers.add_parser('poll', help='poll data from a sensor')
parser_poll.add_argument('mac', type=valid_mitemp_mac)
parser_poll.set_defaults(func=poll)
parser_scan = subparsers.add_parser('backends', help='list the available backends')
parser_scan.set_defaults(func=list_backends)
args = parser.parse_args()
if args.verbose:
logging.basicConfig(level=logging.DEBUG)
if not hasattr(args, "func"):
parser.print_help()
sys.exit(0)
args.func(args)
if __name__ == '__main__':
main()

You can use the time module to pause the program for 10 seconds on each iteration;
from time import sleep
def func(n):
print(n+1)
for i in range(5):
func(i)
sleep(10)
>1
>2
>3
>4
>5
# (every 10 seconds)
However this will block the rest of the program running, although a simple multi-threading script to call the writing function would suffice.
And in relation to the code you are using, insert the sleep call within the poll function and wrap what you have there. If you want to loop the program 10 times then;
def poll(args):
"""Poll data from the sensor."""
for _ in range(10):
# code things
f = open('file.txt', 'a') # << Use append here or you will keep overwriting file contents
f.write('hello')
f.close()
sleep(10)
Or if you want it to run forever until you KeyboardInterrupt or exit somehow:
def poll(args):
"""Poll data from the sensor."""
while True:
# code things
f = open('file.txt', 'a') # << Use append here or you will keep overwriting file contents
f.write('hello')
f.close()
sleep(10)

you need some kind of loop that polls your sensor - I do not see one glancing over your code. You got while and for loops in JS as well - look them up in http://docs.python.org/3/tutorial if you are unsure about the syntax.
store the time you wrote to a variable , sleep a bit poll the next value, check if 10s passed, write if, else not. (or simply sleep 10s between polls if you do not want intermediate values printed
Readup about loops:
for statement
looping techniques
import time
def poll():
return time.time(), 42
last_write = None # when did we record to file last?
# loop for as long as you want - while True would loop endlessly
for _ in range(7):
t,c = poll() # call poll() to get time and temperature from mocked data reader
# check if enough time has passed
if last_write is None or (t-last_write) > 2: # check if new reading needed
with open("t.txt","a") as f:
f.write(f"{t} {c}\n")
last_write=t
print("in file ", t,c)
else:
print("just output ", t,c)
time.sleep(0.7) # sleep some
Output:
in file 1552978725.5224085 42 # ...25.5
just output 1552978726.2232893 42 # ...26.2 - not 2s passed
just output 1552978726.9241226 42 # ...26.9 - not 2s passed
in file 1552978727.6249442 42 # ...27.6 - 2.1s passed
just output 1552978728.3259027 42 # ...28.3 - not 2s passed
just output 1552978729.0267787 42 # ...29.0 - not 2s passed
in file 1552978729.7275977 42 # ...29.7 - 2.1s passed
More remarks:
use with open(filename,mode) as f: and scope the file opeations below it - it will autoclose your file after scope and handle exceptions by closing the filehandle as well.
Using mode "w" will truncate the file before writing to it - you might want to use append instead: reading and writing files

Getting Python code to call a PowerShell script and run it

I could really use some help on this python script that is to call and run existing PowerShell scripts that are in a specific folder. From want I can see on from many of the articles on this site I've read my code seems correct. First a little background I'm trying to write a python script that will take Powershell scripts in a targeted folder and create a menu that can be selected 1, 2, 3 etc. The use makes the selection and that corresponding Powershell script is run. Now the issue is when I place the code on a server and run it with some test PowerShell scripts I get the following error: The term "Filename.ps1" is not recognized as the name of a cmdlet, function, script file, or operable program. And of course the Powershell scripts won't run. A copy of my code is below. Can anyone see any issue.
## ENOC Text Menu Dynamic test
##version 1
## Created By MTDL Marcus Dixon
## Code produce in Notpad++ For python v3.4.4
import os, subprocess, time, pathlib, logging, fnmatch,
re, sys, io
## Directory Enumerator
fileFolderLocationFilter = fnmatch.filter(os.listdir
('C:\\Users\\MTDl\\Documents\\Automation_Scripts\
\ENScripts\\'), "*.ps1")
selectedFile=""
## Menu defined setting veriables
def ENOC_menu():
files = fileFolderLocationFilter
counter = 1
print (20 * "=" , "Enoc Quick Menu" , 20 * "=")
enumFiles = list(enumerate(files))
for counter, value in enumFiles:
str = repr(counter) + ") " + repr(value);
print(str)
str = repr(counter+1) + ") Exit";
print(str)
print (57 * "_")
str = "Enter your choice [1 - " + repr((counter+1))
+ "]:"
choice = int(input("Please Enter a Selection: "))
selectedFiles = enumFiles[choice]
return(selectedFiles[1])
if choice > counter :
choice = -1
elif choice != counter :
print("Please selecte a valid choice")
else:
selectedFiles = enumFiles[choice]
print(selectedFiles[1])
##selectedFiles = selectedFiles[1]
return choice
##initiating loop
loop = True
while loop:
try:
choice = ENOC_menu()
scriptToRun = choice
powershell = 'C:\\WINDOWS\\system32\
\WindowsPowerShell\\v1.0\\powershell.exe'
print ('\n' +'You selected '+ choice
+'\n')
subprocess.call(powershell + ' ' +
choice, shell=True)
except OSError as err:
logger.error(err) ##continue to work on
logging this renders but may be incorrect.
print ('OS error: {0}' .format(err))
except ValueError:
print ('Oops we had an issue try again')
else:
print ('---' + choice + '---' + '\n')

opening shelf file / dbm file returns error dbmError created file using dbm.open and shelve.Shelf.open

python 3.4.2, on Linux
I'm pretty new to this language but I'm coding this project. It started as a simple program that displayed a dictionary . Well I'm trying to expand on it based on tutorials that i am reading. I came to one about shelving and being able to preserve info in a save file in a format much like a dictionary. So far i have a program that takes input and updates the dictionary based on the input. It's very basic but it works on a simple level but naturally I would want to save what I entered. Following is the code so far.
the updateSaveP1() function is what is giving me trouble. Although not coded like this currently, i would ultimately like the function to take 2 arguments, one to name the key in the shelf file, and one to reference the target dictionary/ list etc. Currently its not even saving to the file.
the loadINV() function is a place holder and doent work as coded currently. i need to figure out the dbm problem first as i get the same dbmError with the load function too.
I originally just .opened the file. found documentation here at Stack that i should open it with either so that it creates the right file. I have tried both to no avail.
NOTICE**** this code will create an empty file on your system at the working directory of python named savedata.db
Much Thanks and appreciation for any help.
`import pygame, math, sys, os, pprint, shelve, dbm,
SAVE_LOCATION = os.path.join(os.getcwd() + '/savedata')
SAVE_FILE_LIST = os.listdir(os.getcwd())
SOURCE = os.path.dirname('inventory.py')
YES = ["y","Y"]
NO = ["n","N"]
playerStash = {"rope": 77,
"giant's toe" : 1,
"gold" : 420}
'''def loadINV():
fileTOload = dbm.open('savedata.db', 'w')
print('opened savedata file')
#for eachLine in fileTOload:
playerStash.update(str(fileTOload.read())
)
print('updated dict')
fileTOload.close()'''
def checkSavesFile():
while True:
if os.path.exists(SAVE_LOCATION):
print('Save file found')
break
elif os.path.exists(SAVE_LOCATION + '.db'):
print('.db Save file found')
loadINV()
break
else:
updateSaveP1()
print('New Save Created')
break
def updateSaveP1():
with dbm.open('savedata', 'c') as save:
save['player1'] = str(playerStash)
save.close()
#print(SAVE_LOCATION) #debugging - file name format verification
#pprint.pprint(SAVE_FILE_LIST) debugging will pretty print list of files
checkSavesFile() # runs the save file check
def askAboutInv(player):
while True:
print("What item would you like to add? \n\
(leave blank and press enter to quit)")
name = input() # Reads input and checks for duplicates or non entries
if name == '':
break # Stop loop
elif name in playerStash.keys():
# the check to see if input was in dictionary
dict_quant = int(playerStash.get(name, 0))
# "dict_quant" represents the value in dictionary as an integer
dict_item = str(playerStash.get(name, 0))
# "dict_item represents the value in dictionary as a string
addedItem = dict_quant + 1
#handles adding the value of the input
print("You have " + dict_item + " already, \n\
would you like to add more Y/N?")
# prints " You have "dictionary number" already"
answer = input()
# checks for input if you want to add more to inventory
if answer in YES: #checks to see if y or Y is entered
playerStash[name] = addedItem
# adds +1 to the quantity of "name" per the dict_quant variable
print("you have " + str(addedItem) + " now")
# prints " you have "new dictionary number" now"
if answer in NO: #checks to see if n or N was entered
print("Nothing added") #prints
break #ends loop
else: #if none others statements are true
if name not in playerStash.keys():
#if "name" / input is not in the dictionary
playerStash[name] = playerStash.setdefault(name, 1)
# add the item to the dictionary with a value of 1
print('Inventory updated.')
# prints
updateSaveP1()
def inventoryDisp(player):# displays dictionary pointing towards argument
print("Inventory")
item_total = 0
for eachOne in playerStash.items():
print(eachOne) # looks at and prints each item/ key in dictionary
for i, q in playerStash.items():
item_total = item_total + q #adds all the quantities / values up
print("Total number of items: " + str(item_total))
# prints total number of items in inventory
def updatedInv(player): #same as above just reads "updated inventory"
print("Updated Inventory")
item_total = 0
for eachOne in playerStash.items():
print(eachOne)
for i, q in playerStash.items():
item_total = item_total + q
print("Total number of items: " + str(item_total))
inventoryDisp(playerStash)
askAboutInv(playerStash)
updateSaveP1()
updatedInv(playerStash)`
Update*****
after changing this:
`def updateSaveP1():
with dbm.open('savedata', 'c') as save:
save['player1'] = str(playerStash)
save.close()`
to this:
`def updateSaveP1():
save = openShelf()
#save = shelve.Shelf(dbm.open('savedata', 'c')) #old code
save['player1'] = str(playerStash)
print(save['player1'])
save.close()`
it would seem that the dictionary does get saved. now the loadINV function is giving me trouble. This:
def loadINV():
fileTOload = dbm.open('savedata.db', 'w')
print('opened savedata file')
#for eachLine in fileTOload:
playerStash.update(str(fileTOload.read())
)
print('updated dict')
fileTOload.close()
is now this:
def loadINV():
file = openShelf()
print('opened savedata file')
playerStash.update(file['player1'])
print('updated dict')
fileTOload.close()
but the .update() method returns this error: which i can't seem to find any info.
Traceback (most recent call last):
File "/home/pi/inventoryShelve.py", line 58, in <module>
checkSavesFile() # runs the save file check
File "/home/pi/inventoryShelve.py", line 40, in checkSavesFile
loadINV()
File "/home/pi/inventoryShelve.py", line 25, in loadINV
playerStash.update(file['player1'])
ValueError: dictionary update sequence element #0 has length 1; 2 is required

Turned out I was saving (into the shelf) the data for the inventory dictionary as something other than a dict:
def updateSaveP1():
save = openShelf()
save['player1'] = str(playerStash)
#print(save['player1'])
save.close()
became
def updateSaveP1():
save = openShelf()
save['player1'] = dict(playerStash)
#print(save['player1'])
save.close()