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Step 1: Create a new virtual environment + activate the virtual environment
When using conda to install or update software packages, an error message is reported:failed with initial frozen solve. Retrying with flexible solve
Solution
- Step 1: Exit after failure and clean up the environment
(1)conda update conda: Update Conda
(2)conda clean --all: Clean up the environment and remove potentially conflicting packages- Step 2: Create and activate a virtual environment
(1) Open the cmd command line terminal or Anaconda Prompt.
(2) Create a new virtual environment (optional):conda create -name py39 python=3.9. Among them:-name py39means to create a new virtual environment named py39,Python=3.9means to specify the Python version as 3.9.
(3) Activate the created new virtual environment:conda activate py39
(4) Check the python version:python --version
(1.1) BUG: The Python version displayed after activation is different from the one specified when creating a new one.
- Reason : It may be due to some problems with Python version management in Anaconda. (Most likely due to poor network)
- Workaround (Install python separately after activating the virtual environment), the operation is as follows:
conda activate py39+conda install python=3.9+python --version.
(1.2) Successful activation: In the environment configuration of Anaconda software, a py39 virtual environment will appear.
Step 2: Configure the virtual environment in Pycharm + activate the environment in Terminal and use it.
Note: PyCharm's Terminal (terminal) and cmd (command prompt) are two different command line tools, the former is used to execute commands and operations in PyCharm.
(1) The environment has not been configured:
(2) The environment has been configured: enter Run / Debug Configurations, select Python interpreter
Step 3: Exit the virtual environment + delete the virtual environment
- Exit the virtual environment:
conda deactivate- Delete the virtual environment:
conda env remove --name py39. Among them: py39 is the name of the virtual environment to be deleted. Note: Before deleting a virtual environment, make sure that you no longer need it and that there is no important data in it. Use caution to avoid accidentally deleting important environments or data.
