I'd like to use Windows Task Scheduler to run a python script within a virtual environment. I'd like the Scheduler to run a .bat file that will
activate the virtualenv
run the script
These steps work together from the command line, and they work individually in a .bat, but I can't seem to get them to work together from the .bat. It seems the virtualenv is not fully activated when I try to execute the python script and confused as to why.
My .bat looks like this:
call workon venv
cd path/to/Python/proj
python -m script.py
I've tried adding timeouts immediately after the call to workon and tried moving the workon to seperate .bat called from my first file, but the other lines still execute before the virtualenv is activated. Any help is greatly appreciated!
You do not need to activate the virtual environment while running in .bat. All you need to do is to run the python.exe file in your virtual environment.
{path to virtual environment directory}/Scripts/python.exe path/to/your/file.py
In Windows Task Scheduler you can specify the path in which the command prompt will open. So all you need to do is when adding the action, use path to your python in the field Program/script, the name of the file to be run in Add arguments field, and the path to your file.py in Start in field.
P.S if you are reading or writing files in your python file, note that your path will be relative to the one you specify in your start in field in the Action window
You can use an ampersand & operator in a oneliner batch file.
call workon venv & cd path/to/Python/proj & python -m script.py
It will run each command after the other.
You can also double up the ampersand to make it a conditional operator. &&:
call workon venv && cd path/to/Python/proj && python -m script.py
Here the command will only run, if the previous command completed successfully, in other words ERRORLEVEL = 0
Just type
call .\venv\Scripts\activate.bat
in the .bat file and any command afterwards will see the venv activated
for the record call in a cmd pauses the execution of the current script, executes the called one and then resumes.
Create .bat file
write virtual environment activate script location and python file location as below use '&' operator to run two commands.
as below:
"E:\Call Allocation Engine\Development\development_env\Scripts\"activate & python run.py
https://i.stack.imgur.com/31Gkh.png
finally place this file in desired folder and run using cmd.
E:\Call Allocation Engine\Development\Optimisation\Scheduling>file_name.bat
this script will activate virtual environment and run your python code in that environment.
Another way to do this is to make a shortcut of the batch file and then change the "Start in" field.
After that remember to use the full paths in your batch file since it will be running from a difference location.
Edit activate.bat and place this line at the bottom:
python yourscript.py
Schedule the activate.bat itself and it will automatically run your script after the virtual environment activated.
Related
This question already has answers here:
How to source virtualenv activate in a Bash script
(12 answers)
Activate a virtualenv with a Python script
(10 answers)
Closed 2 years ago.
I have a file called setup.sh which basically has this
python3 -m venv env
source ./env/bin/activate
# other setup stuff
When I run sh setup.sh, the environment folder env is created, and it will run my #other setup stuff, but it will skip over source ./env/bin/activate, which puts me in my environment.
The command runs just fine if I do so in the terminal(I have a macbook), but not in my bash file.
Three ideas I've tried:
ensuring execute priviges: chmod +x setup.sh
change the line source ./env/bin/activate to . ./env/bin/activate
run the file using bash setup.sh instead of sh setup.sh
Is there a smarter way to go about being put in my environment, or some way I can get the source to run?
Unfortunately, you can't really do this with a bash script. When you execute a bash script, it runs inside it's own shell, and when it exits it drops that shell and returns you to the shell you started from.
Thus, if you were to do something inside your script such as set an environment variable, you would see that it was not set once you left the script. Note that this is different than if you source a file, which is effectively what you see with your bashrc/profile files when a shell is started for you.
In your given script, the python environment will be activated for the lifetime of the script, and no longer. You probably should look at programs like pyenv that can look at directory files and seamlessly join you to the correct python environment.
You need a shebang(#!) at the top of your sh file, like so:
#!/bin/sh
source ABSOLUTE_PATH/env/bin/activate
# virtualenv is now active.
#
python3 ABSOLUTE_PATH/script.py
#
# other setup stuff
Insert the paths to the files from the root. Then, make the file executable with chmod 755. Then it can be run by double clicking the file.
If you're just looking to debug code, consider downloading an IDE (i.e. PyCharm CE) that will activate the virtual environment upon opening each project.
I've done a fair bit of bash scripting, but very little batch scripting on Windows. I'm trying to activate a Python virtualenv, run a Python script, then deactivate the virtualenv when the script exits.
I've got a folder called env, which is my virtualenv, and a folder called work, which contains my scripts.
This is what I've got so far:
%~dp0env\Scripts\activate.bat
python %~dp0work\script.py
deactivate
However, when I run the script, it activates the virtualenv then stops. It does not get to the second line and run the Python script. Is there a way to "source" the activate script folder, so that the rest of the batch script can be run as if I'd called activate.bat from the command line?
I'd say you just need to prepend 'call' to your activate.bat invocation, to ensure that the current batch file is resumed after activate is executed:
call %~dp0env\Scripts\activate.bat
Consider doing the same for deactivate.bat. Furthermore, if you want to ensure that the current cmd.exe environment is not polluted by a call to your batch file, consider wrapping your commands in a setlocal/endlocal command pair.
I made a .lnk file that points to cmd /k "path/to the/script/activate.bat", and it works.
CMD parameters & options
I suppose you just want to perform the same commands in Windows as if expected in Linux Bash/shell. When I want to start a virtualenv I am actually in its top directory, and the Linux command would be "source bin/activate".
It is no problem to simulate this behaviour on Windows. Me personally, I've put a batch file named activate.bat somewhere on the PATH environment variable like this:
:: activate.bat
#echo off
REM source bin/activate
if "%1" == "bin/activate" (
if not EXIST "%CD%\Scripts\activate.bat" goto notfound
set WRAPEX=Scripts\activate.bat
) ELSE (
set WRAPEX=%*
)
call %WRAPEX%
goto :eof
:notfound
echo Cannot find the activate script -- aborting.
goto :eof
a colleague of mine has written a python script that I need to use, which is called within a shell script. It produces plots with matplotlib. However, when I try to run his script, it fails in matplotlib commands with "ImportError: No module named PyQt4". The python script is called within the shell script with a syntax like
./script.py
script.py begins with a line to specify the python exec to use from within his miniconda environment, like
#!/user/miniconda/envs/py27/bin/python
I think the problem is that the code uses the default PyQt on my system when I run this command. I tried running script.py with the python exec in his environment, but this gives the same error. This also occurs if I try to run the script on his computer when logged into my account. Is there a way that I can run this script as if I were my colleague within my account?
Have your colleague generate a yaml file with his environment dependencies, then create a copy of his environment on your computer to run the script.
# your coworker runs:
conda env export -n [name of his environment] > environ.yml
Once you get yaml file, you can run
conda env create -f environ.yml
to copy the environment. From there, activate it and run the script
# on Windows
activate [environment name]
python ./script.py
# on *nix
source activate [environment name]
python ./script.py
I have a command that only runs correctly inside a Python virtual environment I've configured (as intended). I know that I can run the command as
$ cmd args
once I've activated the venv. But (due to the constraints of the tool I'm using) I need to activate run (and deactivate?) in one line: something equivalent to running
$ activate_somehow cmd args
outside the command line.
Is there a way to do this?
You can generally run something in a virtual environment simply by using a fully qualified path to the script. For example, if I have:
virtualenv .venv
Then I can install something into that virtual environment without activating it by running:
.venv/bin/pip install foo
This should be true for anything installed using standard Python mechanisms.
After looking into the generated bin/activate script, it seems like the only thing relevant to python is the VIRTUAL_ENV variable, so this should be enough to get going:
$ env VIRTUAL_ENV=path/to/venv python ...
Note that the python executable in the bin directory of target environment is just a symlink to globally installed interpreter, which does nothing other that setting process executable path. Assuming the program does not make use of it, utilizing the main binary itself seems harmless. In case you have installed a package which in turn installs some executables, just specify the absolute path:
$ env VIRTUAL_ENV=path/to/venv path/to/venv/bin/executable
You can create a simple wrapper script which runs activate, executes your command, and then deactivates simply by exiting the script in which your environment was activated.
#!/bin/sh
. ${venv-./env}/bin/activate
"$#"
This lets you set the environment variable venv to the path of the environment you want to use, or else uses ./env if it is unset. Perhaps a better design would be to pass the env as the first parameter:
#!/bin/sh
. "$1"/bin/activate
shift
"$#"
Either way, save this somewhere in your PATH ($HOME/bin is a common choice for your private scripts) and give it executable permission.
I found venv-run which should do what you ask:
pip install venv-run
venv-run cmd args
Larsk's answer is probably cleaner, but this is another possible way.
Assuming you use UNIX and your user is user and you have a virtual environment in home (any) directory, ie /home/user/venv, you can make a script like:
#!/bin/sh
export VIRTUAL_ENV=/home/user/venv
export PATH=/home/user/venv/bin:$PATH
python3 "$#"
We can make this script executable (eg call it venv-python3 and do chmod +x venv-python3) and call it as such, or put it some place discoverable in PATH - let's say alongside python. Assuming you have sudo rights:
sudo cp venv-python3 /usr/bin/venv-python3
Then we can call that instead of the python callable. Since the variables are set within the script, explicit call on deactivate is not necessary at exit.
Example:
user#machine ~ % venv-python3 --help
This works for at least for virtualenv version 20.0.17 but if adopted, you should be keeping an eye on what variables bin/activate sets, if this ever changes.
Yes, you can execute the python file using a virtual environment in a single line of command on windows.
venv\Scripts\activate&&python fall_detector.py
I installed pgadmin4 in my home directory in a virtual environment called "pgadmin4".
I use fish shell and it runs perfectly fine with:
~/pgadmin4/bin/python3 ~/pgadmin4/lib/python3.10/site-packages/pgadmin4/pgAdmin4.py
Just in case this helps somebody.
I am setting up calls to python (Anaconda distribution) via BAT files and the windows task scheduler.
I've now used environments for the first time and was trying to set a .bat file up as below:
activate [my_env]
python my_script.py
deactivate
Unfortunately it appears that the second command does not get executed.
Use the 'call' command when activating/deactivating the environment.
call activate [my_env]
python my_script.py
call conda deactivate
See https://github.com/conda/conda/issues/794
Are you sure you need a batch file? I think this should work.
cmd "/c activate [my_env] && python my_script.py && deactivate"
When I made a simple file containing
print("Hello")
Which I called myprint.py and ran
cmd "/c activate anaconda33 && python myprint.py && deactivate"
This worked for me. You could also put this in a one line batch file.
All activate does is put the environment in the front of the PATH. You can just call the absolute path to the python in the environment you want, like C:\Anaconda\python my-script.py.