Python环境搭建

python
conda --version
conda info

# 初始化shell，管理员权限打开cmd和powershell
# 初始化shell后，可直接在对应的shell中开启虚拟环境
conda init cmd.exe
conda init powershell

conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
conda config --set show_channel_urls yes

# 查看下载包的通道
conda config --show channels

# 查看已执行的配置命令
conda config --get

# 删除设置的通道
conda config --remove channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/

# 创建环境
conda create -n learning
# 激活环境
conda activate learning
# 在当前环境中安装Python3
conda install python=3
# 在当前环境中安装Jupyter
conda install jupyter

# 删除环境
conda remove -n test --all
# 查询所有环境
conda env list
# 退出当前环境
conda deactivate
# 查询环境中已安装的包
conda list
conda list -n learning
# 搜索可安装的包
conda search jupyter

pip install jupyter

jupyter notebook

python -m pip install pip==21.3.1
pip install ipython

%run a.py

stringList = ["aaa", "bbb", "ccc"] * 100000
%time subStringList = [x for x in stringList if x.startswith("a")]
%timeit subStringList = [x for x in stringList if x.startswith("a")]

%paste
%cpaste

a = 1
%xdel a
%reset

%hist

%pylab

!pwd
path = !pwd