Why do .py files only run if you write python in front of them?

Question

Python

I write in the console: program_name.py. Gives out:

Python path configuration:
  PYTHONHOME = (not set)
  PYTHONPATH = (not set)
  program name = 'C:\Users\\u0410\u0440\u0442\u0451\u043c\AppData\Local\Programs\Python\Python38\python.exe'
  isolated = 0
  environment = 1
  user site = 1
  import site = 1
  sys._base_executable = 'C:\\Users\\\u0410\u0440\u0442\u0451\u043c\\AppData\\Local\\Programs\\Python\\Python38\\python.exe'
  sys.base_prefix = ''
  sys.base_exec_prefix = ''
  sys.executable = 'C:\\Users\\\u0410\u0440\u0442\u0451\u043c\\AppData\\Local\\Programs\\Python\\Python38\\python.exe'
  sys.prefix = ''
  sys.exec_prefix = ''
  sys.path = [
    'C:\\Users\\\u0410\u0440\u0442\u0451\u043c\\AppData\\Local\\Programs\\Python\\Python38\\python38.zip',
    'C:\\Users\\\u0410\u0440\u0442\u0451\u043c\\AppData\\Local\\Programs\\Python\\Python38\\Lib\\',
    'C:\\Users\\\u0410\u0440\u0442\u0451\u043c\\AppData\\Local\\Programs\\Python\\Python38\\DLLs\\',
    'C:\\Users\\\u0410\u0440\u0442\u0451\u043c\\AppData\\Local\\Programs\\Python\\Python38',
  ]
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

Current thread 0x0000061c (most recent call first):
<no Python frame>

I write: python program_name.py. It gives out what is written in the program, everything works fine.
How to get rid of this need to constantly write python in the beginning?
PS Methods from stackoverflow didn't help.

Answer 1

Solution: download the Uninstall tool crooked, delete everything and everywhere that is connected with the python. Install again without adding to PATH and without changing any settings.