Python print formatting of binary number

Question

I have a binary number I need to print including the leading zeros. So far I do this with:

print("CRC -> {:08b}".format(crc)

But this crc could have different sizes. What I'd like to achieve is a print statement that instead of :08b would take individual length like

crc_len = (len(hex(crc))-2)*4

But how would my print then need to look, how can I do conditional formatting depending on crc_len?

DYZ · Accepted Answer · 2018-11-28 07:06:47Z

2

You may first prepare the format string (because it is just a string, after all) and then use it for formatting the CRC:

crc = 23534
format = "CRC -> {{:0{:d}b}}".format((len(hex(crc)) - 2)*4)
#'CRC -> {:016b}'
format.format(crc)
#'CRC -> 0101101111101110'

answered Nov 28, 2018 at 7:06

DYZ

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1 Comment

po.pe Over a year ago

Thanks, I tried the "same" approach with string concatenation like format = "CRC -> {{:0"+str((len(hex(crc)) - 2)*4)+"b}}" but that didn't work. Yours does!

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