Installing Python 2.7 on Windows 8

问题:

So I'm trying python 2.7 on my Windows. It is running Windows 8. I cannot add it to my path. I've done the usual: using the advanced system settings, environment variables, adding C:\Python27 in system variables.

However, when I type Python in command prompt it says 'python is not recognized ..'

回答1:

I think that the essence of this question is how to install Python and be able to use it from the command line. The steps below show how to get all that working. Check that you didn't miss anything:

1. From https://www.python.org/download/releases/2.7.6 download appropriate Python 2.7.6 Windows Installer. (If that link doesn't work, check https://www.python.org/downloads/)
2. Run the file
3. Select install for all users or install just for me, click Next
4. You'll see it installs under the C:\Python27 folder, click Next
5. Click Next again for the 'Customize Python' step
6. Click Finish
7. Open Control Panel, then System
8. Click 'Advanced system settings' on the left
9. Click the 'Environment Variables' button
10. Under 'System variables' click the variable called 'Path' then the 'Edit...' button. (This will set it for all users, you could instead choose to edit the User variables to just set python as a command prompt command for the current user)
11. Without deleting any other text, add C:\Python27; (include the semi-colon) to the beginning of the 'Variable value' and click OK.
12. Click OK on the 'Environment Variables' window.

Open a new command prompt window type python, you will have python running in the command prompt. Note: command prompt windows open prior to setting the Environment Variable will not have the python command available.

回答2:

Easiest way is to open CMD or powershell as administrator and type

set PATH=%PATH%;C:\Python27

回答3:

System variables usually require a restart to become effective. Does it still not work after a restart?

回答4:

Make sure you don't put a space between the semi-colon and the new folder location that you are adding to the path.

For example it should look like...

{last path entry};C:\Python27;C:\Python27\Scripts;

...not...

{last path entry}; C:\Python27; C:\Python27\Scripts;

回答5:

How to install Python / Pip on Windows Steps

1. Visit the official Python download page and grab the Windows installer for the latest version of Python 3. python.org/downloads/

2. Run the installer. Be sure to check the option to add Python to your PATH while installing.

3. Open PowerShell as admin by right clicking on the PowerShell icon and selecting ‘Run as Admin’

4. To solve permission issues, run the following command:

Set-ExecutionPolicy Unrestricted

5. Next, set the system’s PATH variable to include directories that include Python components and packages we’ll add later. To do this: C:\Python35-32;C:\Python35-32\Lib\site-packages\;C:\Python35-32\Scripts\

6. download the bootstrap scripts for easy_install and pip from https://bootstrap.pypa.io/ ez_setup.py get-pip.py

7. Save both the files in Python Installed folder Go to Python folder and run following: Python ez_setup.py Python get-pip.py

8. To create a Virtual Environment, use the following commands:

cd c:\python pip install virtualenv virtualenv test .\test\Scripts\activate.ps1 pip install IPython ipython3 Now You can install any Python package with pip

That’s it !! happy coding Visit This link for Easy steps of Installation python and pip in windows http://rajendralora.com/?p=183

回答6:

Type this in Windows PowerShell or CMD:

"[Environment]::SetEnvironmentVariable("Path", "$env:Path;C:\Python27", "User")"

After running the command, please restart PowerShell or CMD. If it still doesn't work, restart your PC.

回答7:

i'm using python 2.7 in win 8 too but no problem with that. maybe you need to reastart your computer like wclear said, or you can run python command line program that included in python installation folder, i think below IDLE program. hope it help.

回答8:

there is a simple procedure to do it go to controlpanel->system and security ->system->advanced system settings->advanced->environment variables then add new path enter this in your variable path and values

回答9:

GUI Option:

1. Open System Properties

   a. Type it in the Start Menu

   b. Use the keyboard shortcut Win+Pause)

   c. From Windows Explorer address bar go to

   %windir%\System32\SystemPropertiesProtection.exe

   d. Write SystemPropertiesProtection in run window and press Enter

2. Switch to the Advanced tab

3. Click Environment Variables
4. Select PATH in the System variables section
5. Click Edit
6. Add python's path to the end of the list (the paths are separated by semicolons).

For example:

C:\Windows;C:\Windows\System32;C:\Python27

Command Line Option:

1. Run Command Prompt as administrator

2. Check existing paths under PATH variable (the paths are separated by semicolons). If your python folder already listed then no need to add again. Default python folder is C:\Python27

   C:\Windows\system32>path or C:\Windows\system32>echo %PATH%

3. Append python path using setx command. The /M option sets the variable at SYSTEM scope.

The default behavior is to set it for the USER.

C:\Windows\system32>setx /M PATH "%PATH%;C:\Python27"