我无法在终端上运行Python，但收到此错误消息。
Nicks-MBP:~ mfi$ source activate PythonData
Could not find conda environment: PythonData
You can list all discoverable environments with `conda info --envs`.
Nicks-MBP:~ mfi$ conda info --envs
# conda environments:
#
base * /Users/mfi/anaconda3