Describe the bug
Command line arguments passed into a python script are processed by pyenv shims causing unexpected results if they contain text that look like a batch file variable, i.e. contain a % character, including

• Argument position parameters (e.g. %0, %*), parameter extensions (e.g. %~p0), and environment variables (e.g. %PATH%, %DATE%) will be expanded before they are passed into the python script.
• Single % characters are removed from arguments passed into the python script, e.g. %foo will pass in foo.
• Multiple % surrounding text cause the entire text to be removed, e.g. a%foo%b will pass in ab, while %foo% will be removed entirely and not seen as an argument at all.
• Bad expansions may cause pyenv to error, e.g. %~foo.

Issue can be worked around by escaping the % character but requires multiple escapes, e.g. %%%%0 will provide the python string %0.

To Reproduce
Given a python script that takes command line arguments, e.g.

import sys 
for index, arg in enumerate(sys.argv):
    print(f"Arg {index} [{arg}]")

run the script with arguments that match Windows batch file variables

python args.py a0-%0 a1-%1 a2-%2

Expected behavior
Preferably arguments should be passed to python as if running python directly, without batch expansions. If that is not possible, perhaps a more intuitive way to escape % for a literal character.

Screenshots
Running python through pyenv shims expands parameters

PS C:\Users\me> python args.py %0 %1 %2   
Arg 0 [args.py]
Arg 1 [pyenv]
Arg 2 [exec]
Arg 3 [python]

Running python directly passes argument strings correctly.

PS C:\Users\me> C:\Users\me\.pyenv\pyenv-win\versions\3.8.5\python.exe args.py %0 %1 %2 
Arg 0 [args.py]
Arg 1 [%0]
Arg 2 [%1]
Arg 3 [%2]

Passing bad parameters throws errors.

PS C:\Users\me> python args.py %~foo   
The following usage of the path operator in batch-parameter
substitution is invalid: %~foo

For valid formats type CALL /? or FOR /?

Desktop (please complete the following information):

• OS: Windows 10
• Tools used: Powershell 7
• Version: 2.64.3

Additional context
Discovered while working on a script to process URLs containing a space in the path, which would be translated to %20, e.g. https://example.com/a%20file.txt.