PyInstaller : script not found

I want to create a simple .exe file of a simple python script with pyinstaller. I follow the guide (https://www.pyinstaller.org/) :

1. pip install pyinstaller
2. pyinstaller yourprogram.py

But I do not obtain my .exe file in the DIST folder as explained in https://pyinstaller.readthedocs.io/en/stable/usage.html :

In the dist folder you find the bundled app you distribute to your users.

I use Python 3.7.6 with anaconda. I download first the PyInstaller from www.pypi.org/project/pyinstaller/, it is the version 4.2 but it gives me the same following error, so I tried with the latest version 5.0 which is in developpement.

In my case, I executed in the Anaconda Prompt :

C:\Users\David Gomez\Desktop\test>pyinstaller simple.py

I obtain :

1418 INFO: PyInstaller: 5.0.dev0
1418 INFO: Python: 3.7.6 (conda)
1418 INFO: Platform: Windows-10-10.0.19041-SP0
1432 INFO: wrote C:\Users\David Gomez\Desktop\test\simple.spec
1434 INFO: UPX is not available.
script 'C:\Users\David Gomez\Desktop\test\simple.py' not found

The script is then not found. After some research, I thought the probleme was the space in my path between my name "David Gomez", so I wrote the path with quotes:

C:\Users\David Gomez\Desktop\test>pyinstaller "C:\Users\David Gomez\Desktop\test\simple.py" 

But the same error remains.

Then I found another personne having the same problem (Script not found when using pyinstaller), but the answer is not convincing and I clearly do not want to install another python. I create a new topic because that one is not updated anymore, the proposed solution :

I found the solution. I had to first install Python from their own website instead of the Windows store. Then I had to add it to a PATH. After this it still did not work because I used Python 3.8.0, so I had to install pyinstaller development version.

Any ideas what the problem could be? Any help or guesses are appreciated. If there is a need for further clarification, let me know.

Edited part

When I check my folder with the command dir, I obtain :

 C:\Users\David Gomez\Desktop\test>dir
 Le volume dans le lecteur C s’appelle Windows
 Le numéro de série du volume est 3AFA-C44C

 Répertoire de C:\Users\David Gomez\Desktop\test

15.03.2021  11:20    <DIR>          .
15.03.2021  11:20    <DIR>          ..
11.03.2021  15:52               160 simple.py.py
               1 fichier(s)              160 octets
               2 Rép(s)  166,905,487,360 octets libres

Then, I do the command C:\Users\David Gomez\Desktop\test>pyinstaller "C:\Users\David Gomez\Desktop\test\simple.py" and two new empty folders are created (build, dist) and a file simple.spec. Normally, if everything works corectly the folders are not empty. Now if I check again my folder with dir command :

C:\Users\David Gomez\Desktop\test>dir
 Le volume dans le lecteur C s’appelle Windows
 Le numéro de série du volume est 3AFA-C44C

 Répertoire de C:\Users\David Gomez\Desktop\test

11.03.2021  16:57    <DIR>          .
11.03.2021  16:57    <DIR>          ..
11.03.2021  16:57    <DIR>          build
11.03.2021  16:57    <DIR>          dist
11.03.2021  15:52               160 simple.py.py
11.03.2021  17:41             1,059 simple.spec
               2 fichier(s)            1,219 octets
               4 Rép(s)  166,908,215,296 octets libres

Simply.py is in the folder but not found by pyinstaller, I still have no idea what to do.

I do not know if it is usefull but here you have the content of the simple.spec :

# -*- mode: python ; coding: utf-8 -*-

block_cipher = None


a = Analysis(['simple.py'],
             pathex=['C:\\Users\\David Gomez\\Desktop\\test'],
             binaries=[],
             datas=[],
             hiddenimports=[],
             hookspath=[],
             runtime_hooks=[],
             excludes=[],
             win_no_prefer_redirects=False,
             win_private_assemblies=False,
             cipher=block_cipher,
             noarchive=False) pyz = PYZ(a.pure, a.zipped_data,
             cipher=block_cipher) exe = EXE(pyz,
          a.scripts,
          [],
          exclude_binaries=True,
          name='simple',
          debug=False,
          bootloader_ignore_signals=False,
          strip=False,
          upx=True,
          console=True ) coll = COLLECT(exe,
               a.binaries,
               a.zipfiles,
               a.datas,
               strip=False,
               upx=True,
               upx_exclude=[],
               name='simple')