problem in using pyqrcode module to create QRcode

[akbarza]

It's for Windows(Python 3.11.3) i use cmder,commands are same for environment/install in for cmd.
So just open cmd and do this and it should work,don't have to make a virtual environment.

pip install PyQRCode pypng

hi
I downloaded and installed cmder.
When I wanted to act as you said step by step , the below problems were raised:
line 25 in your text:

Error:
(qr_env) λ ls
'ls' is not recognized as an internal or external command,
operable program or batch file.

and line 29:

Error:
C:\code\qr_env
(qr_env) λ cat qr_code.py
'cat' is not recognized as an internal or external command,
operable program or batch file.

can you explain what are 1s or ls and cat ?
thanks