[cosmetic] format strings in Python scripts

[ponyatov]

I see a lot of str() function calls in Python scripts, maybe it will better to use f"" format strings to make code a bit cleaner?

as a sample, from build_linker.py:

f"""
MEMORY
{{
  FLASH (r x) : ORIGIN = 0x{FLASH_BASE:>08X}, LENGTH = {FLASH_SIZE//1024:>4}K
  RAM   (rwx) : ORIGIN = 0x{RAM_BASE:>08X}, LENGTH = {RAM_SIZE//1024:>4}K
{f'  CCM   (rwx) : ORIGIN = 0x{CCM_BASE:>08X}, LENGTH = {CCM_SIZE//1024:>4}K' if CCM_SIZE else ''}
{f'  XRAM  (rwx) : ORIGIN = 0x{XRAM_BASE:>08X}, LENGTH = {XRAM_SIZE//1024:>4}K' if XRAM_SIZE else ''}
{f'  QSPI  (rw ) : ORIGIN = 0x{QSPI_BASE:>08X}, LENGTH = {QSPI_SIZE//1024:>4}K' if QSPI_SIZE else ''}
}}
"""

[gfwilliams]

Thanks, but personally I'm not overly bothered by this. It's not like we have a great deal of them (I count 124 in every script in the scripts folder) , and I feel like the original:

MEMORY
{
  FLASH (rx)      : ORIGIN = """+hex(FLASH_BASE)+""", LENGTH = """+str(int(FLASH_SIZE/1024))+"""K
  RAM (xrw)       : ORIGIN = """+hex(RAM_BASE)+""", LENGTH = """+str(int(RAM_SIZE/1024))+"""K
}

Isn't really that hard to understand. By contrast you've got stuff like >08X and // instead of normal division, and {{ when the actual character we're generating is just {. For me as a non-python native I find that more confusing than what we have