I'm experimenting with the threading function in python 3 to get my own pingtesting app/log working, so im following a youtube tutorial
When I've launched a python 3 interpreter, and run:
>>> import threading
>>> print_lock = threading.Lock()
It correctly returns
>>> print_lock
<_thread.lock object at 0x042093C8>
But when I use that piece of code in a script and try to run it as
python scriptName.py
I get an error saying the attribute Lock() doesn't exist
AttributeError: 'module' object has no attribute 'Lock'
How is this possible? I've verified what threading.Lock() returns when running the python interpreter, why isn't it recognized when I try to run it in a script and how can I get this running?
Did you happen to name your module (or another module in the working directory) threading.py? It would get imported ahead of the built-in threading, causing this exact problem.
Trying running:
print(threading.__file__)
in your module, I suspect you'll find it's not the Python built-in.
Related
More Generally: How can I run a process that runs from the terminal with required keyword arguments using python?
It seems subprocess.Popen is what I want to use.
Here is what I try to run from inside a script:
from subprocess import Popen
Popen(['goodreads-user-scraper', '--user_id 149832357'])
“goodreads-user-scraper” is recognized, but I don’t understand how to pass a keyword argument. I know how to pass an argument, but if I remove “—user_id” I still get same problem.
I have installed goodreads-user-scraper. It works well from the terminal. It is a python package that you can run from the terminal. Repository found here.
Below is how I would ideally like to run the process but from inside python:
pip install goodreads-user-scraper
goodreads-user-scraper --user_id <your id> --output_dir goodreads-data
Result of running from terminal:
Research
In my research I have found these two that seem helpful, but I haven’t been able to adapt the answers to my needs:
Why does passing variables to subprocess.Popen not work despite passing a list of arguments?
How to use subprocess popen Python
Separate all of your arguments like this:
from subprocess import Popen
Popen(['goodreads-user-scraper', '--user_id', '149832357'])
I'm trying to run a program which connects to all databases(mysql,sqlite) and fetch data from it .
Python version - 3.6.8
Since the code is too long ,i'm showing only particular snippets.
def show_columns_mysql(cursor,tbname):
cursor.execute("""show columns from %s"""%(tbname))
rs=cursor.fetchall()
colname=[]
for i in rs:
colname.append(i[0])
return colname
There is no problem or issue if i exexute the program in normal python environment . When i try to execute this in virtual environment ,it shows me No module named 'cPickle' .
I have tried all the solutions but none solved my problem .
What was the problem ?
There is no cPickle in Python 3. Just import pickle. pickle will automatically use the C accelerator.
Install pickle. Then do:
import pickle as cPickle
Running Python 3.6.5, PyWin32 223.
After install I have included the the C:\Python32\lib\win32 folder in path.
I am just running the normal testService shell that seems to be all over the internet. Can be found below.
import win32serviceutil
import win32service
import win32event
import servicemanager
import socket
class AppServerSvc (win32serviceutil.ServiceFramework):
_svc_name_ = "TestService"
_svc_display_name_ = "Test Service"
def __init__(self,args):
win32serviceutil.ServiceFramework.__init__(self,args)
self.hWaitStop = win32event.CreateEvent(None,0,0,None)
socket.setdefaulttimeout(60)
def SvcStop(self):
self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
win32event.SetEvent(self.hWaitStop)
def SvcDoRun(self):
servicemanager.LogMsg(servicemanager.EVENTLOG_INFORMATION_TYPE,
servicemanager.PYS_SERVICE_STARTED,
(self._svc_name_,''))
self.main()
def main(self):
pass
if __name__ == '__main__':
win32serviceutil.HandleCommandLine(AppServerSvc)
I can "compile" and install the service fine, as soon as I run it I get an error to check the system logs. When I do I get the following error.
The Test Service Process service terminated with the service-specific error Incorrect function..
I have not been able to find any help through google from this decade. I am new to the library and the only help I found was to add its lib to the path. If its a path error, its no longer that. Anyone have any ideas?
Thanks in advance!
It turns out that it was a permission issue. I request root for 30 seconds and worked like a charm. Just FYI if anyone is having this problem.
In my case the problem was in the way I run the python module. Instead of executing the Python script, I use
$ python -m module
This works correctly when running in the appropriate directory but when running as a service, the module could not be found. So the solution if executing modules directly with Python is to pip install the module so that it can be found by the service.
In my case was due to the fact that the python script I was trying to run as a service wasn't in the same drive of the python installation. Also check this useful answer.
Is it possible to access the object macros internally in RiveScript? I'm bit confused with that.
I have defined the following script:
> object small python
return "4"
< object
+ small
- <call>small</call>
Which gives me an error when I enter small:
error: [ERR: Object Not Found]
make a space after the object name just like that
- <call>small </call>
The definition of the object seems to be ok, but you are probably running it from https://play.rivescript.com/ or https://www.rivescript.com/try, which only allow JavaScript or CoffeeScript (see the about page).
You can use rivescript-python to run the code, which you can install by:
pip install rivescript
Then put your rivescript in a file (.rive), for example, in helloworld.rive.
Then in python:
from rivescript import RiveScript
bot = RiveScript()
bot.load_directory('.') # set your directory where the .rive file(s) is/are
bot.sort_replies()
Now you can use bot.reply to get the answer for a certain input:
>>> bot.reply('localuser','small')
'4'
Edit: I have tested this code on Ubuntu 14.04 with Python 3.4.3 and Python 2.7.12 and rivescript 1.14.4.
I have written a chess program in Python 3.4.3 and I am running the Python 3 interpreter in the interactive mode as follows:
python3 -i chess.py
However, the code after the class definitions get invoked twice and I do not know why. My code is on pastebin
You should remove the line from chess import * that is at the end of the file, it should not be needed.
Also, it is common to make sure that some of the code is not executed unless the code in the module is executed as a script.
if __name__ == '__main__':
# Not executed if the module is imported
g = Game()