Code to calculate tetration using my method

[nuninho1980]

I use Python 3.11 x64 for Windows 10 and I tried to run your code... but I got errors:

Code:

Python 3.11.4 (tags/v3.11.4:d2340ef, Jun  7 2023, 05:45:37) [MSC v.1934 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from math import*
>>>
>>> def mod(a,b):
...     A=(a**2+b**2)**0.5
...     return A
... def Arg(a,b):
  File "<stdin>", line 4
    def Arg(a,b):
    ^^^
SyntaxError: invalid syntax
>>>     Z=atan2(b,a)
  File "<stdin>", line 1
    Z=atan2(b,a)
IndentationError: unexpected indent
>>>     return Z
  File "<stdin>", line 1
    return Z
IndentationError: unexpected indent
>>> def p(x):
...   a=x
...   while a<0:
...     a=a+1
...   return a
... def fn(a,n):
  File "<stdin>", line 6
    def fn(a,n):
    ^^^
SyntaxError: invalid syntax
...

What's your version of Python for no any errors?