python-venv

问题 Whenever I create a venv, I get a message asking me to upgrade pip. I run the command for upgrade, and it pops up again on another venv. How can I make this permanent. Message: You are using pip version 9.0.1, however version 18.0 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command. Update: Just received recommendation to read this possible duplicate answer: virtualenv use upgraded system default pip This does not solve my issue though. Why? My

问题 When trying to create a virtulenv using venv with python 3 on ubuntu it isn’t creating an activate script. It conitunally exits with an error 1. Following docs and other posts on SO such as https://stackoverflow.com/a/19848770 I have tried creating it 2 different ways. sayth@sayth-TravelMate-5740G:~/scripts$ python3 -m venv test4 Error: Command '['/home/sayth/scripts/test4/bin/python3', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1 sayth@sayth-TravelMate

问题 I have installed Python 3.4.0 and created virtual environment with python -m venv myenv . How can I change Python version in my virtual environment? Documentation says: Each virtual environment has its own Python binary (allowing creation of environments with various Python versions) and can have its own independent set of installed Python packages in its site directories. UPDATE Please, note that I ask about venv from standard library, not about virtualenv. Let me provide some links. This is

问题 Running a Django rest api with Tokbox in a Debian Server. I was running it through a python virtual enviroment which was working fine, but need to take it out of the enviroment for a few reasons. When I did so, after installin all dependencies and got it running got the following error: raise RequestError('Failed to create session: %s' % str(e)) opentok.exceptions.RequestError: Failed to create session: Failed to create session, invalid credentials Both keys are saved as enviroment variables

问题 Can we use library installed in one virtual environment from another virtual environment? For eg: Library installed in venv from another virtual environment. 回答1: Short answer: No Virtual environment's purpose is to isolate different python instalation, including their libraries. If you ever find a way to do this, it must be considered a hack and should be reported to virtual environment as a bug. 回答2: It should be possible, you just have to import the module by giving the full path to the

问题 After reading the following statement from PEP 405 A pyvenv installed script is also provided to make this more convenient: pyvenv /path/to/new/virtual/environment I tried to create a new virtual environment and failed miserably; C:\>python --version Python 3.3.1 C:\>pyvenv myvenv 'pyvenv' is not recognized as an internal or external command, operable program or batch file. Apparently pyvenv script is not installed into Scripts folder which is being usually added to the PATH environment

问题 I'm using Python 3.4 on Windows. I have created a virtual environment with python c:\Python34\Tools\Scripts\pyvenv.py foo Then activated it foo\Scripts\activate.bat And installed several libraries in it. Question: Is it safe to rename the venv folder "foo" to "bar"? I.e. once i have renamed foo to bar, then activate it with bar\Scripts\activate.bat will it still work? What could make problems are any environment variable settings and absolute paths. 回答1: To be able to do that you should use

问题 I'm running multiple installs of Python on Windows Server 2012. I can probably find a way to work around this, but I'm curious as to what is going on. I'm wary about radically changing the installs in case I break other people's Python scheduled tasks that I may not be aware of. (All the code boxes below are PowerShell). PS C:\> C:\Python34\Scripts\pip.exe list jdcal (1.0) pip (7.1.2) setuptools (12.0.5) virtualenv (13.1.2) Although this Python 3.4 install doesn't have Django installed, it

问题 I want to create a virtual environment using Enthought's Canopy distribution, but with no site packages. following: https://support.enthought.com/entries/21802240-Use-venv-not-virtualenv-with-Canopy-Python I set up the environment, leaving off the -s to not install the site packages: $ venv path/to/virtual_environment_dir $ source path/to/virtual_environment_dir/bin/activate And this uses the correct python, but still uses the system easy_install and pip (env) $ which python path/to/virtual

问题 I'm creating a new Python virtual environment with Python's 3.5 built-in virrtualenv package: D:\Projects>python -m venv --system-site-packages proj_3 D:\Projects>cd proj_3 D:\Projects\proj_3>Scripts\activate.bat (proj_3) D:\Projects\proj_3>pip install comtypes Collecting comtypes Downloading comtypes-1.1.2.zip (179kB) 100% |################################| 184kB 569kB/s Installing collected packages: comtypes Running setup.py install for comtypes ... done Successfully installed comtypes-1.1