I have a list of decimal numbers as integers, and I want to convert them into binary. The output must be without 0b prefix and also it must be 4 digits
like:
lista = [1,2,3,4,5,6,7,8,9,10]
listres = [0001,0010,0011,0100,...]
thanks in advance
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1You mean you want to convert them to strings, right?Matthieu Brucher– Matthieu Brucher2018-10-29 21:13:51 +00:00Commented Oct 29, 2018 at 21:13
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1@roganjosh decimal as in decimal base, I suppose.Matthieu Brucher– Matthieu Brucher2018-10-29 21:14:21 +00:00Commented Oct 29, 2018 at 21:14
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@roganjosh no worries ;)Matthieu Brucher– Matthieu Brucher2018-10-29 21:17:09 +00:00Commented Oct 29, 2018 at 21:17
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What if the input list contains the number 20?mkrieger1– mkrieger12018-10-29 21:19:22 +00:00Commented Oct 29, 2018 at 21:19
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4 Answers
You can use map with format here, with '04b':
>>> list(map(lambda x: format(x,'04b'),lista))
['0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010']
2 Comments
Abolfazl ghiasi
just like the above answer, the result of your code is string binary digits : ['0001', '0010', '0011', '0100', '0101'] but how can I obtain integer as result like : [0001, 0010, 0011, 0100, 0101]
sacuL
You can't, those aren't integers if they're zero padded.
Another hacky way to achieve this is:
listres = [str(bin(x))[2:].zfill(4) for x in lista]
1 Comment
Abolfazl ghiasi
the result of your code is string binary digits : ['0001', '0010', '0011', '0100', '0101'] but how can I obtain integer as result like : [0001, 0010, 0011, 0100, 0101]
This sounds like homework, so I'll just give a recommendation on how to proceed in creating the second list. If you know how to convert an integer into a binary representation, then you can use a list comprehension:
lista = [1,2,3,4,5,6,7,8,9,10]
listb = [integer_to_binary(n) for n in lista]
Here integer_to_binary() is just a function that converts an integer into its binary representation. It sounds like what you want is a string showing the binary representation, so I'll leave that to you to figure out (hint: try using format())
1 Comment
Abolfazl ghiasi
no its not a homework. but thanks for recommendation
Use bin method;
>>> a = bin(6)
>>>a
'0b110'
a[2:]
110
