#  NumbersToFile.py  Copyright (c) Kari Laitinen

#  http://www.naturalprogramming.com

#  2006-05-14  File created.
#  2022-12-27  Converted to Python 3.

#  This program writes binary values to a file.

#  https://docs.python.org/3/library/struct.html

#  Module pickle may be worth studying when you need to store
#  complex data to a file.


import struct

file_to_write  =  open( "NumbersToFile_output.data", "wb" )

integer_to_file  =  0x22

while  integer_to_file  <  0x77  :

   file_to_write.write( struct.pack( 'i', integer_to_file ) )

   integer_to_file  =  integer_to_file  +  0x11


file_to_write.write( struct.pack( 'h', 0x1234 ) )  # short value
file_to_write.write( struct.pack( 'd', 1.2345 ) )  # double value
file_to_write.write( struct.pack( 'b', True ) )    # byte, boolean
file_to_write.write( struct.pack( 'b', False ) )   # byte, boolean
file_to_write.write( struct.pack( '8s', str.encode( "aaAAbbBB"  ) ) ) # string (8 characters)

bytes_to_file  = [ 0x4B, 0x61, 0x72, 0x69 ]

file_to_write.write( struct.pack( '4b',
                                  bytes_to_file[ 0 ], bytes_to_file[ 1 ],
                                  bytes_to_file[ 2 ], bytes_to_file[ 3 ] ) )

#  Let's write a large byte 0xC9 to the end of file. 

file_to_write.write( struct.pack( 'B',  0xC9 ) )

file_to_write.close()