Crash when writing to a txt file from within a --onefile .app ?

[Ed May]

Hi everyone,

I am new to PyInstaller and having some trouble with one area? I was hoping that someone might know the right place to look for the method to use?

Using a very simple PyQt6 GUI - I have code that outputs a small text file when the user pressed a button. This uses the normal `with open("filename.txt", "w") as f:` python pattern. When I run the app using my normal python interpreter, it all works as expected: I get a small window and when you click the button, a txt file is created in the same folder as the script.

so that is all fine.

I am able to run PyInstaller just fine, and the build all seems to go normal. I get a good .app file when it is done.

I can then run the .app file just fine, and it opens with the same GUI as before the build.

BUT: as soon as I click the button in the GUI, the app crashes and I get an error report.

I am not sure where I'm going wrong there, or if I should be:

a) Using a different method than the with open(...)... syntax when using PyInstaller?

b) Is there something I should be setting in the .spec file perhaps?

# Environment / Versions:

• Macbook 2021, Apple M1 Max
• OS 12.2 (Monterey)
• Python 3.10
• PyInstaller 4.10
• PyQt6
  

Any suggestions are much appreciated!

thanks very much,

-Ed

[Steve Barnes]

Hi Ed,

 

I suspect that the problem is that you are not explicitly setting the path to write your text file into - if you are using onefile mode then the current working directory is either inside a zip file or a temporary location that you may not have write permissions for.

 

This is given away by: which is not a valid file path.

 

I would try one or more of:

 

1. A fixed known path - easy but not portable,
2. A path based on the user profile more portable,
3. Prompting for an output path - probably what you eventually want.

 

Hope that helps.

 

Steve Barnes

 

From: pyins...@googlegroups.com <pyins...@googlegroups.com> On Behalf Of Ed May
Sent: 13 March 2022 00:23
To: PyInstaller <pyins...@googlegroups.com>
Subject: [PyInstaller] Crash when writing to a txt file from within a --onefile .app ?

 

Hi everyone,

 

I am new to PyInstaller and having some trouble with one area? I was hoping that someone might know the right place to look for the method to use?

 

Using a very simple PyQt6 GUI - I have code that outputs a small text file when the user pressed a button. This uses the normal `with open("filename.txt", "w") as f:` python pattern. When I run the app using my normal python interpreter, it all works as expected: I get a small window and when you click the button, a txt file is created in the same folder as the script.

 

 

 

so that is all fine.

 

I am able to run PyInstaller just fine, and the build all seems to go normal. I get a good .app file when it is done.

 

I can then run the .app file just fine, and it opens with the same GUI as before the build.

 

BUT: as soon as I click the button in the GUI, the app crashes and I get an error report.

 

 

I am not sure where I'm going wrong there, or if I should be:

a) Using a different method than the with open(...)... syntax when using PyInstaller?

b) Is there something I should be setting in the .spec file perhaps?

 

# Environment / Versions:

• Macbook 2021, Apple M1 Max
• OS 12.2 (Monterey)
• Python 3.10
• PyInstaller 4.10
• PyQt6

Any suggestions are much appreciated!

thanks very much,

-Ed

 

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