How to use Python 2.7 after installing anaconda3?

First, in the anaconda Download the corresponding version of anaconda3

install anaconda3

open anaconda3, Click on the left side of the interface Environments, Click on the Create The button will appear in the following window ,
To create Python Environment name and select version , Select and click Create To generate new Python Version environment , Here's the picture

stay anaconda3 Use different versions of Python：

1、 stay anaconda3 Use... In the graphical interface ： Just click on the corresponding environment name , If necessary Python2.7 Next use , Click on py27 Then switch to Python2.7

2、 stay Mac Terminal use ： The input terminal

source activate { Name of the environment }

Such as

source activate py27

You can switch the version to Python2.7, At this time, under the terminal pip and conda The orders are all right Python2.7 Version to operate ; If you want to go back to the default version （ The default version is 3.6）, Input

source deactivate

that will do （ notes ： stay Windows Under the system , The switching and closing of the environment is similar to the above , Just one less source command ）

anaconda3 Next different version Python install TensorFlow：

because Mac Only support CPU Version of TensorFlow, Therefore, the installation is relatively simple , Switch to what you want to use Python edition , Input

pip install tensorflow

perhaps

conda install tensorflow

You can install TensorFlow

Copy 、 Move and delete

linux Copy the file below 、 The move and delete commands are ：cp,mv,rm
One 、 File copy command cp
Command format ：cp [-adfilprsu] Source file (source) Target file (destination)
cp [option] source1 source2 source3 … directory
Parameter description ：
-a: Refer to archive It means , It also means copying all directories
-d: If the source file is a connection file (link file), Copy the connection file properties instead of the file itself
-f: mandatory (force), If there is any repetition or other question , Don't ask users , And forced copying
-i: If target file (destination) Already exists , When overriding, it will first ask if the operation is true
-l: Establish a hard connection (hard link) The connection file for , Instead of copying the file itself
-p: Copy with file properties , Instead of using default properties
-r: Recursive replication , For directory copy operations
-s: Copy as symbolic connection file (symbolic link), namely “ Shortcut ” file
-u: If the target file is older than the source file , Update target file
Such as the /test1 In the catalog file1 Copied to the /test3 Catalog , And change the file name to file2, You can enter the following command ：
cp /test1/file1 /test3/file2
Two 、 File move command mv
Command format ：mv [-fiv] source destination
Parameter description ：
-f:force, Force to move directly without asking
-i: If target file (destination) Already exist , You will be asked if you want to overwrite
-u: If the target file already exists , And the source file is relatively new , Will update
Such as the /test1 In the catalog file1 Copied to the /test3 Catalog , And change the file name to file2, You can enter the following command ：
mv /test1/file1 /test3/file2

Linux All files in the current directory are moved to the upper directory

mv * …/

3、 ... and 、 File delete command rm
Command format ：rm [fir] File or directory
Parameter description ：
-f: Mandatory deletion
-i: Interactive mode , Ask the user whether to operate before deleting
-r: Recursive delete , It is often used in the deletion of a directory
If you delete /test In the catalog file1 file , You can enter the following command ：
rm -i /test/file1

There was a problem updating environment variables .bash_profile Cannot edit

If you're editing .bash_profile when , Prompt " You are not a document “.bash_profile” Owner , So you don't have permission to write to this file .", It can be solved by the following operations .

In the personal folder Directory , open Go2Shell, Input .bash_profile To open , When opened, a prompt will pop up , And there's a copy button , Click to make a copy , Finish editing .
Input... At the terminal cd ~, And then you type in ls -al, Then enter the command sudo mv bash_profile copy .txt .bash_profile Cover the contents of the document .
Input vim .bash_profile The contents of the file will be displayed , Make sure the configuration is correct , Enter... At the end :q Proceed to exit .
Input source .bash_profile updated ,

Reference link ：https://www.jianshu.com/p/9bbb33072c3a