fun with python f-string

fstring_test.py

n = 0xffee
m = 1999888777
f = 1599.499899
n32 = 0xffeeddcc
n64 = 0xffeeddcc80402010

fstring =f'''
n = {n} (0x{n:X}),  m = {m},  f = {f}
n64 = 0x{n64:X},  n32 = 0x{n32:X}

f"{{var:[FILL][ALIGN][LENGTH][,_][BASE]}}"

{{n:32X}}      =>  "{n:32X}"
{{n:032x}}     =>  "{n:032x}"
{{n:<32x}}     =>  "{n:<32x}"
{{n:.<32x}}    =>  "{n:.<32x}"
{{n:l<32x}}    =>  "{n:l<32x}"
{{n:_^32x}}    =>  "{n:_^32x}"

{{n64:019_x}}  =>  "0x{n64:019_x}"
{{255:019_x}}  =>  "0x{255:019_x}"
{{n64:079_b}}  =>  "0b{n64:029_b}"
{{255:079_b}}  =>  "0b{255:079_b}"

{{n32:09_x}}   =>  "0x{n32:09_x}"
{{255:09_x}}   =>  "0x{255:09_x}"
{{n32:029_b}}  =>  "0x{n32:029_b}"
{{255:029_b}}  =>  "0x{255:029_b}"

{{m:_}}        =>  "{m:_}"
{{f:,}}        =>  "{f:,}"
{{f:_}}        =>  "{f:_}"
{{f:e}}        =>  "{f:_e}"
{{f:+,}}       =>  "{f:+,}"
{{-f:+,}}      =>  "{-f:+,}"
'''
print(fstring)

# output:
#
# n = 65518 (0xFFEE),  m = 1999888777,  f = 1599.499899
# n64 = 0xFFEEDDCC80402010,  n32 = 0xFFEEDDCC

# f"{var:[FILL][ALIGN][LENGTH][,_][BASE]}"

# {n:32X}      =>  "                            FFEE"
# {n:032x}     =>  "0000000000000000000000000000ffee"
# {n:<32x}     =>  "ffee                            "
# {n:.<32x}    =>  "ffee............................"
# {n:l<32x}    =>  "ffeellllllllllllllllllllllllllll"
# {n:_^32x}    =>  "______________ffee______________"

# {n64:019_x}  =>  "0xffee_ddcc_8040_2010"
# {255:019_x}  =>  "0x0000_0000_0000_00ff"
# {n64:079_b}  =>  "0b1111_1111_1110_1110_1101_1101_1100_1100_1000_0000_0100_0000_0010_0000_0001_0000"
# {255:079_b}  =>  "0b0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_1111_1111"

# {n32:09_x}   =>  "0xffee_ddcc"
# {255:09_x}   =>  "0x0000_00ff"
# {n32:029_b}  =>  "0x1111_1111_1110_1110_1101_1101_1100_1100"
# {255:029_b}  =>  "0x0000_0000_0000_0000_1111_1111"

# {m:_}        =>  "1_999_888_777"
# {f:,}        =>  "1,599.499899"
# {f:_}        =>  "1_599.499899"
# {f:e}        =>  "1.599500e+03"
# {f:+,}       =>  "+1,599.499899"
# {-f:+,}      =>  "-1,599.499899"