I seem to be having a problem with executing a Python script from a Win+R terminal.
I completed the following steps:
Used the shebang line before typing my script for all .py files. An example of what I did below for a script called Primefactorization.py.
#! python3
I created a batch file in the same folder with the same name and input the following code:
#python.exe C:\Python Scripts\Primefactorization.py %*
I added the path (C:\Python Scripts) to the PATH variable in the environment variables window.
When I try to invoke the script using the Run command in Windows 7, the shell opens and immediately disappears.
Based on a past answer to a similar problem on Stack Overflow, I also added the following code prompting the user for input before exiting. But that doesn't seem to work.
x = input('press enter to close')
Could you please let me know where the problem might be?
Your path has a space in it. Enclose it in double quotes. For example:
python.exe "C:\Python Scripts\Primefactorization.py"
Related
I'm running windows
I've got a python script that works as expected when I run it from my interpreter (Anaconda, i think that's an interpreter...), but when I run it from my file manager by double clicking the script ("script.py") I see a quick black screen flash, but nothing else. I'm using the input() function, so that's not the issue.
When I try the same thing with a simple test script, which is just the print() function and the input function, the command line or terminal screen, whatever the black screen is called, displays my printed string and closes only after I press enter.
I believe my issue has to do with file paths and working directories, but I'm a noob and I don't know how to solve this. My script declares this variable:
inv_folder=r"C:\Users\domin\OneDrive\Desktop\Test Folder" #folder to look for completed recipe files
which I believe is an absolute filepath. I then loop through the files in that folder and open and read them
for filename in os.listdir(inv_folder):
Main goal is to send my script to someone else's computer, and allow them to run it simply by double clicking on the file. Trying to do that on my computer and failing
Doubleclicking the .py file in Windows will generally run the file. In your case, if all your script is doing is looking for a directory and looping through files in it, it is quite possible that the script is working correctly, but that it is closing immediately upon completing the script.
E.g. if you have the following python file hello.py with the single line of code.
print("hello world")
If you doubleclick hello.py, you will only see a black window flash for a second, as the program runs and exits.
To check whether your code is working correctly or not, you are best to navigate to that folder in your command prompt and run the program within the command prompt. E.g. typing "hello.py" in the right folder will then show the correct output in the console.
Try running it in the console first, seeing if the code is giving any errors, and then working from there. But the behaviour you are describing is basically standard Windows behaviour and not necessarily an error.
If you need to pause the window after running, please see the following StackOverflow question and answers about "Python Equivalent to System('PAUSE')"
Have you considered to compile it?
You can compile it easily with pyinstaller and this command:
C:\<path_to_python>\Scripts\pyinstaller.exe --onefile -n <your script name> <your script path>
Of course replace the <> with the relevant paths for you.
I have made a Python program that uses output.to_csv('results.csv'). When I run it in Spyder it creates that CSV file. But when I double click on it nothing happens. Cmd appears and closes but nothing on the folder, no results.csv.
What am I missing? What more do I have to do?
Run the program from the command line itself instead of double-clicking the .py file.
I assume you are on Windows since you mention CMD. First, cd into the directory containing your program. Then, run python <program>.py or python3 <program>.py depending on your installation.
This time, you will see any output or error messages that appear in CMD without it immediately closing.
If the .csv file really exists, you should be able to go to your File Explorer and find the file at the top of the "Quick Access" section. Right-click the file and hover over "Open With >". Then select Notepad and a notepad will open up showing your results.
If you do not see the file, then try running your program on the command prompt (for Windows):
Press the windows key and type "cmd" in the search bar.
Choose "Command Prompt"
Go to the dir of your program using the cd command
Type python <program name>.py
If there are no errors, follow the steps in the first paragraph.
Ok i guess windows is not recommended at all for this type of tasks. I mean running something simple as create such file is like trying to kill the Lernaean Hydra.
What i did is i just runned it with anaconda prompt and it worked sweet! Thanks for help. Thanks to all!
PS: I'm seriously considering changing to Linux after this
For anyone having the same problem, but have anaconda installed. 1) Open Anaconda Prompt, 2) use cd (1 space) then adress of the folder which contains your py program (eg. cd C:\Users\Bernie\Desktop\tasos) and hit enter, 3) on the next line that appears type: python program_name.py, 4)Hit enter, 5)success!
I am using python 3 on Win10 and running my code by opening a Command Prompt window and typing the file location. However, the window closes as soon as the program terminates, and before I can read any errors.
Edit: This happens whether or not the program has errors.
Thank you.
Solution 1:
I just saw your comment:
When I do that, I recieve the error 'python' is not recognized as an
internal or external command, operable program or batch file
It looks like you haven't specified the path to the python executable: you need to add the python executable path to your Window's PATH variable. You can see how to do that here: Add Python to the PATH Environmental Variable (‘python’ is not recognized as an internal or external command)
Solution 2:
You can use input("enter to exit") at the end of your python code to keep the program alive. It would exit once you press enter.
You could also surround your code in a try except statement and place thr input() in the except to prevent the program from exiting when there are errors, but like #Kevin mentioned in the comments, this would catch run time errors but not syntax errors.
Solution 3:
You can write errors or anything information you want to a file such as log.txt for example, and then read that log file once the code finishes running e.g. how to write to a file in Python
FWIW, I have several Python versions on my Windows system, so I don't want to add any Python directories to my path permanently.
Code for each version is in a separate folder (e.g. 'py37'), with a subfolder for each project e.g. 'myProject'.
In py37, there's a batch file called pyEnv.bat with this content:
#echo off
path=%path%;C:\Python37\;C:\Python37\Scripts\
cd.
cmd
In Windows explorer, I head over to the project folder I want to work in, click in the address bar and type ..\pyEnv. That launches a DOS-box, in which I now can do python myproject.py. You can see print() output, errors, and so on.
You can up-arrow to try different modules, having typed them first.
Once you quit the DOS-box, your path is back to normal again.
I am new to Python and currently doing a basic python course to learn. I have been running code all day via the Command Prompt and it has been working fine. For some reason though it has stopped working and python files I try to run are returning the following error:
Traceback (most recent call last):
File "", line 1, in
NameError: name 'hello' is not defined
As per the screen shot and the numbers on it, I performed the following steps in an attempt to run the file:
change to the folder where file is saved
run 'dir' to list all files. I am trying to run 'hello.py'. This contains the code: print('hello simon!')
I can run the file by just typing hello.py into the command prompt, this works ok
I can also run with: python hello.py - this works ok
when I activate Python by typing Python --> Enter, this starts the interpreter ok. However if I then try to run by typing hello.py I get the error message.
This has worked ok all day, I have not changed anything on my PC (to the best of my knowledge!) but just started to get this error a few hours ago. I have looked all over the internet for solution but found nothing. I have uninstalled and re-installed Python, restarted etc... all to no avail.
I am running Python 3.6.5 on a Windows 7 64 bit PC.
It won't let me attach a picture so here is link to screenshot of Command Prompt and error: https://i.stack.imgur.com/BBUe5.jpg
I hope someone can help me with this please
Thankyou
You are not supposed to execute hello.py in the Python Interpreter. It won't work. When you type in python and hit Enter in your Command Prompt, Just type this,
>>> print('hello simon!')
And hit Enter, it would definitely work. Because the interpreter is supposed to execute a code line by line. So if you want to run a Python Script then do not execute it in the Interpreter.
The problem is that when you write python (alone), the command line calls python shell and the following commands are run inside the python shell and not in the command line anymore. Calling a script from the shell has a different format (look it up). You can enter exit() to exit the shell back to command line again
What you are trying to achieve is you are running Hello.py inside Python.
Not with Python.
You need to run Hello.py with Python. As python is interpreter over here.
>>>python
means you are going inside python shell
>>>print('hello simon!')
Is equivalent to your program.
You are running your Python Script as you should and it's working. If you added Python to your path you can run Script you only need to call the Script "hello.py". If you have more than one intepreter, or you didn't added it to your path then you can call it like this "C:\path\to\python\interpretet\pythonxxx.exe" "c:\path\to\python\script.py" you can enven pass arguments to it "C:\path\to\python\interpretet\pythonxxx.exe" "c:\path\to\python\script.py" --argument
When you type python in a shell, then interactive mode is activated. This is like a shell where you type commands and got interpreted right away, in the same way as cmd and powershell works, but for python. This way you can test snippets, or just do simple stuff overly complicated like this
import os
ls = os.listdir(os.path.abspath('c:/'))
def print_dir():
for file in ls:
print(file)
Wich in cmd would be dir c:\ or in powershell ls c:\. The point is that you can test libraries, explore objects, replace the shell or just have fun.
I have installed Python and written a program in Notepad++.
Now when I try to type the Python file name in the Run window, all that I see is a black window opening for a second and then closing.
I cant run the file at all, how can run this file?
Also I want to tell that I also tried to be in the same directory as a particular Python file but no success.
I assume you are running the script with command python file_name.py.
You can prevent closing of the cmd by getting a character from user.
use raw_input() function to get a character (which probably could be an enter).
It sounds like you are entering your script name directly into the Windows Run prompt (possibly Windows XP?). This will launch Python in a black command prompt window and run your script. As soon as the script finishes, the command prompt window will automatically close.
You have a number of alternatives:
First manually start a command prompt by just typing cmd in the Run window. From here you can change to the directory you want and run your Python script.
Create a Windows shortcut on the desktop. Right click on the desktop and select New > Shortcut. Here you can enter your script name as python -i script.py, and a name for the shortcut. After finishing, right click on your new shortcut on the desktop and select Properties, you can now specify the folder you want to run the script from. When the script completes, the Python shell will remain open until you exit it.
As you are using Notepad++, you could consider installing the Notepad++ NppExec plugin which would let you run your script inside Notepad++. The output would then be displayed in a console output window inside Notepad++.
As mentioned, you can add something to your script to stop it completing (and automatically closing the window), adding the line raw_input() to the last line in your script will cause the Window to stay open until Enter is pressed.
Try to open in Command Prompt instead of run window. The syntax is:
py filename.py
If it doesn't work, try to reconfigure Python. Did you set environment variables? If not, this could help you