Running Windows 10 python 3.8.1

[quark80]

I downloaded Python (3.8 64-bit)for Windows 10 & Windows Launcher, together with Manuals & Module Docs.
The 'sys.path' is set to C:\Users\quark\AppData\Local\Programs\Python\Python38.

Using: IDLE Python 3.8 64-bit:

While the usual math operators e.g +.-, *, ** , min() , etc. work, 'def' is not recognised and
math.pi generates:

"Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
math.pi
NameError: name 'math' is not defined."

Can someone tell me how to rectify these errors?

[snippsat]

math is a part of Python Standard Library.
This mean that's there is no installation,but you need to import what needed.

>>> import math 
>>> 
>>> math.pi
3.141592653589793

[quark80]

Unfortunately Idle(Python) does not recognise 'import'.

[snippsat]

What you mean bye does not recognize import?
IDLE has two parts when you start up you in interactive shell.

Python 3.7.2 (tags/v3.7.2:9a3ffc0492, Dec 23 2018, 22:20:52) [MSC v.1916 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
>>> import math
>>> 
>>> math.pi
3.141592653589793

Running as script look a this image.
Then code will be like this a file eg test_math.py,no >>> and have to use print().

import math

print(math.pi)

Output:
3.141592653589793

[quark80]

import
SyntaxError: invalid syntax

[quark80]

I have noticed under the Python38 folder that the libs folder contains the items:
_tkinter.lib; python3.lib; python38.lib; which are all quoted as Type VisualStudio.lib , an item I do not have on my computer. Can you tell me what Type they should be, please?

[jefsummers]

Can you copy and paste, using the bbs python tags, the line where you get the error and then the complete error message? It may be something simple.

[snippsat]

import
SyntaxError: invalid syntax

Yes that would be SyntaxError,can not have import alone.

>>> import
  File "<interactive input>", line 1
    import
         ^
SyntaxError: invalid syntax

# Must tell what to import
>>> import math 
>>> 
>>> math.pi
3.141592653589793

have noticed under the Python38 folder that the libs folder contains the items:
_tkinter.lib; python3.lib; python38.lib; which are all quoted as Type VisualStudio.lib , an item I do not have on my computer. Can you tell me what Type they should be, please?

It's just that Windows file associations point it to VisualStudio,this have nothing to say as you shall never open these files.
lib files are static libraries that Python use internally eg _tkinter.lib is a libary file for the build GUI in Python tkinter.

[quark80]

It looks as if the other Items on my computer are interfering with the running of Python.
Thanks to all for your suggestions. I have now stopped trying to run Python.