I am attempting to learn the very basics of Python using the guide "Learn Python the hard way" by Zed A. Shaw. The problem that I am having is that I can run Python scripts, but only when using .\ in front of the name. This opens up CMD for a split second and then closes.
If I attempt to run the file it returns that the file is not an operable program file, script, etc..
I've found multiple questions on Stack Overflow that relate to this question, but none of the solutions have worked for me.
When I check the environment variable PATH it has the correct path within it, so what other things could be causing this?
回答1:
Since, you are able to run Python in PowerShell. You can just do python <scriptName>.py to run the script. So, for a script named test.py containing
name = raw_input("Enter your name: ")print"Hello, "+ name
The PowerShell session would be
PS C:\Python27> python test.py Enter your name:MontyPythonHello,MontyPython PS C:\Python27>
回答2:
As far as I have understood your question, you have listed two issues.
PROBLEM 1:
You are not able to execute the Python scripts by double clicking the Python file in Windows.
REASON:
The script runs too fast to be seen by the human eye.
SOLUTION:
Add input() in the bottom of your script and then try executing it with double click. Now the cmd will be open until you close it.
EXAMPLE:
print("Hello World") input()
PROBLEM 2:
./ issue
SOLUTION:
Use Tab to autocomplete the filenames rather than manually typing the filename with ./ autocomplete automatically fills all this for you.
USAGE:
CD into the directory in which .py files are present and then assume the filename is test.py then type python te and then press Tab, it will be automatically converted to python ./test.py.
回答3:
Go to Control Panel → System and Security → System, and then click Advanced system settings on the left hand side menu.
On the Advanced tab, click Environment Variables.
Under 'User variables' append the PATH variable with path to your Python install directory:
C:\Python27;
回答4:
The command [Environment]::SetEnvironmentVariable("Path", "$env:Path;C:\Python27", "User") is not a Python command. Instead, this is an operating system command to the set the PATH variable.
You are getting this error as you are inside the Python interpreter which was triggered by the command python you have entered in the terminal (Windows PowerShell).
Please note the >>> at the left side of the line. It states that you are on inside Python interpreter.
Please enter quit() to exit the Python interpreter and then type the command. It should work!
回答5:
The default execution policy, "Restricted", prevents all scripts from running, including scripts that you write on the local computer.
The execution policy is saved in the registry, so you need to change it only once on each computer.
To change the execution policy, use the following procedure:
Start Windows PowerShell with the "Run as administrator" option.
At the command prompt, type:
Set-ExecutionPolicy AllSigned
-or-
Set-ExecutionPolicy RemoteSigned
The change is effective immediately.
To run a script, type the full name and the full path to the script file.
For example, to run the Get-ServiceLog.ps1 script in the C:\Scripts directory, type:
C:\Scripts\Get-ServiceLog.ps1
And to the Python file, you have two points. Try to add your Python folder to your PATH and the extension .py.
To PATHEXT from go properties of computer. Then click on advanced system protection. Then environment variable. Here you will find the two points.
回答6:
Using CMD you can run your python scripts as long as the installed python is added to the path with the following line:
C: \ Python27;
The (27) is example referring to version 2.7, add as per your version.
Path to system path:
Control Panel => System and Security => System => Advanced Settings => Advanced => Environment Variables.
Under "User Variables," append the PATH variable to the path of the Python installation directory (As above).
Once this is done, you can open a CMD where your scripts are saved, or manually navigate through the CMD.
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