success with lilypond-book

[Archer Endrich]

To David, Knute and Carl,

I am happy to report success with running lilypond-book on Windows 10.  
For users' info, these are the steps I took, as guided by David, Knute 
and Carl.  It is hard to tell at this point whether it would have worked 
if one or the other of these steps had been omitted.

a) downloaded and installed Python version 3.9 (although 3.6 seemed to 
be on the system already)
b) downloaded and installed MiKTeX  (i.e., pdflatex now on my Windows 10 
computer)
c) rearranged the LilyPond files to be inside a folder named LilyPond;  
thus the file arrangement became: C:\Lilypond2221\LilyPond\user\bin;  
then edited the system path accordingly.  My full system path now looks 
like this:

C:\P3L\lpbk>path
PATH=C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Lilypond2221\LilyPond\usr\bin;C:\cdpr71ae\_cdp\_cdprogs;C:\Users\Archer\AppData\Local\Microsoft\WindowsApps;C:\MiKTeX\miktex\bin\x64\

d) associated Python with lilypond-book.py - The link Knute sent about 
this was very helpful: 
https://www.digitaltrends.com/computing/how-to-change-file-associations/


I first ran lilypond-book manually direct from the command line like this:
>python C:\Lilypond2221\LilyPond\user\bin\lilypond-book.py --output=out 
-- pdf ALMdurasnumber.lytex
[msg:  compiling ALMdurasnumber.lytex ... writing ALMdurasnumber.tex]
>cd out
>pdflatex ALMdurasnumber.tex
[msg:  output written on ALMdurasnumber.pdf]

I then tried running from a batch file in various ways:
Trial 1:
C:\Lilypond2221\LilyPond\user\bin\lilypond-book.py --output=out -- pdf 
ALMdurasnumber.lytex
cd out
pdflatex ALMdurasnumber.tex
cd ..\
This was successful.

Trial 2: the same, but without the .py extension on lilypond-book
This was successful.

Trial 3: the same, but without the explicit path to lilypond-book
This was also successful.

So I'm up and running with lilypond-book (with my batchfile as I had 
been writing it on Windows 7) thanks to all the various help/clues that 
were contributed.  The final batch file is:

C:\lilypond-book --output=out --pdf ALMdurasnumber.lytex
cd out
pdflatex ALMdurasnumber.tex
cd ..\


I hope this information helps others who might find themselves in a 
situation similar to mine.

Huge thanks!
Archer