PyInstaller + UI Files – FileNotFoundError: [Errno 2] No such file or directory:

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After scratching my head all weekend and looking further on SO, I managed to compile the standalone .exe as expected using the UI files.

Firstly, I defined the following function using this answer

Bundling data files with PyInstaller (–onefile)

# Define function to import external files when using PyInstaller.
def resource_path(relative_path):
    """ Get absolute path to resource, works for dev and for PyInstaller """
    try:
        # PyInstaller creates a temp folder and stores path in _MEIPASS
        base_path = sys._MEIPASS
    except Exception:
        base_path = os.path.abspath(".")

    return os.path.join(base_path, relative_path)

Next I imported the .UI files using this function and variables for the required classes.

# Import .ui forms for the GUI using function resource_path()
securitySearchForm = resource_path("securitySearchForm.ui")
popboxForm = resource_path("popbox.ui")

Ui_MainWindow, QtBaseClass = uic.loadUiType(securitySearchForm)
Ui_PopBox, QtSubClass = uic.loadUiType(popboxForm)

I then had to create a resource file (.qrc) using Qt Designer and embed images/icons using this resource file. Once done, I used pyrcc4 to convert the .qrc file to .py file, which would be imported in the main script.

Terminal

C:\Users\giranm\PycharmProjects\PyQt Tutorial>pyrcc4 -py3 resources.qrc -o resources_rc.py

Python

import resources_rc

Once I have confirmed the main .py script works, I then created a .spec file using PyInstaller.

Terminal

C:\Users\giranm\PycharmProjects\PyQt Tutorial>pyi-makespec --noconsole --onefile secSearch_demo.py

As per PyInstaller’s guide, I’ve added data files by modifying the above .spec file.

https://pythonhosted.org/PyInstaller/spec-files.html#adding-data-files

Finally, I then compiled the .exe using the .spec file from above.

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