之前是用anaconda安装的python3.7,项目需要python2.7,原环境都不想删。
打开anaconda prompt,输入命令:
(base) C:\Users\DELL>conda create --name python27 python=2.7
C:\Anaconda3\lib\site-packages\requests\__init__.py:91: RequestsDependencyWarning: urllib3 (1.26.7) or chardet (3.0.4) doesn't match a supported version!
RequestsDependencyWarning)
Collecting package metadata (current_repodata.json): failed
UnavailableInvalidChannel: The channel is not accessible or is invalid.
channel name: simple
channel url: https://pypi.tuna.tsinghua.edu.cn/simple
error code: 404
You will need to adjust your conda configuration to proceed.
Use `conda config --show channels` to view your configuration's current state,
and use `conda config --show-sources` to view config file locations.
报错了。
解决方法如下:
1、执行如下命令
(base) C:\Users\DELL>conda config --add channels r
2、在用户目录(C:\Users\DELL)下找到文件.condarc,打开,文件内容改为下面:
channels:
- r
- http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
show_channel_urls: true
ssl_verify: true
3、再次执行安装py2.7命令,执行中输入两次Y,成功了。
查看版本:python --version
切换py27:activate python27
(base) C:\Users\DELL>conda create --name python27 python=2.7
C:\Anaconda3\lib\site-packages\requests\__init__.py:91: RequestsDependencyWarning: urllib3 (1.26.7) or chardet (3.0.4) doesn't match a supported version!
RequestsDependencyWarning)
Collecting package metadata (current_repodata.json): done
Solving environment: done
## Package Plan ##
environment location: C:\Anaconda3\envs\python27
added / updated specs:
- python=2.7
The following packages will be downloaded:
package | build
---------------------------|-----------------
certifi-2016.2.28 | py27_0 213 KB http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
pip-9.0.1 | py27_1 1.6 MB http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
python-2.7.13 | 1 23.8 MB http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
setuptools-36.4.0 | py27_1 525 KB http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
vc-9 | 0 705 B http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
vs2008_runtime-9.00.30729.5054| 0 1016 KB http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
wheel-0.29.0 | py27_0 121 KB http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
wincertstore-0.2 | py27_0 14 KB http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
------------------------------------------------------------
Total: 27.3 MB
The following NEW packages will be INSTALLED:
certifi anaconda/pkgs/free/win-64::certifi-2016.2.28-py27_0
pip anaconda/pkgs/free/win-64::pip-9.0.1-py27_1
python anaconda/pkgs/free/win-64::python-2.7.13-1
setuptools anaconda/pkgs/free/win-64::setuptools-36.4.0-py27_1
vc anaconda/pkgs/free/win-64::vc-9-0
vs2008_runtime anaconda/pkgs/free/win-64::vs2008_runtime-9.00.30729.5054-0
wheel anaconda/pkgs/free/win-64::wheel-0.29.0-py27_0
wincertstore anaconda/pkgs/free/win-64::wincertstore-0.2-py27_0
Proceed ([y]/n)? y
Downloading and Extracting Packages
vc-9 | 705 B | ############################################################################ | 100%
pip-9.0.1 | 1.6 MB | ############################################################################ | 100%
python-2.7.13 | 23.8 MB | ############################################################################ | 100%
wincertstore-0.2 | 14 KB | ############################################################################ | 100%
certifi-2016.2.28 | 213 KB | ############################################################################ | 100%
wheel-0.29.0 | 121 KB | ############################################################################ | 100%
setuptools-36.4.0 | 525 KB | ############################################################################ | 100%
vs2008_runtime-9.00. | 1016 KB | ############################################################################ | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
#
# To activate this environment, use
#
# $ conda activate python27
#
# To deactivate an active environment, use
#
# $ conda deactivate
(base) C:\Users\DELL>conda info --envs
C:\Anaconda3\lib\site-packages\requests\__init__.py:91: RequestsDependencyWarning: urllib3 (1.26.7) or chardet (3.0.4) doesn't match a supported version!
RequestsDependencyWarning)
# conda environments:
#
base * C:\Anaconda3
python27 C:\Anaconda3\envs\python27
(base) C:\Users\DELL>python --version
Python 3.7.6
(base) C:\Users\DELL>activate python27
(python27) C:\Users\DELL>python --version
Python 2.7.13 :: Continuum Analytics, Inc.
(python27) C:\Users\DELL>