> I am not so clued up on the 'base 2' and 'base 8' stuff.
> Care to explain that a little?
Easy. Imagine the numerals 2,3,4,5,6,7,8,9 were never invented.
You'd start counting at 0.
Next would come 1.
Now you've maxed out your first column so you have to carry to the
next column, so next would c
Johan Geldenhuys said unto the world upon 2005-02-10 00:43:
I am not so clued up on the 'base 2' and 'base 8' stuff.
Care to explain that a little?
Johan
On Tue, 2005-02-08 at 12:12, Pierre Barbier de Reuille wrote:
Hi Johan,
here's a go:
We have 10 fingers. Not coincidentally, we have a base 10 n
On Feb 10, 2005, at 05:43, Johan Geldenhuys wrote:
I am not so clued up on the 'base 2' and 'base 8' stuff.
Care to explain that a little?
Usually, we use base 10 numbers, that is, numbers that can be
represented with 10 symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, 9).
Binary, or base 2, represents all
> I am not so clued up on the 'base 2' and 'base 8' stuff.
> Care to explain that a little?
base 2 is binary, base 8 is octal.
We normally use base 10 decimal.
The base refers to the biggest number that can be represented
by a single digit. (Actually one less than the base because we
start with
I am not so clued up on the 'base 2' and 'base 8' stuff.
Care to explain that a little?
Johan
On Tue, 2005-02-08 at 12:12, Pierre Barbier de Reuille wrote:
MMmmhh ... no !
The number you wrote is equivalent to '010' and any number beginning by
'0' and not followed by "x" will be considered
MMmmhh ... no !
The number you wrote is equivalent to '010' and any number beginning by
'0' and not followed by "x" will be considered octal. So "10" in base 8
is ... 8 :)
If you want to convert a number from base 2 to base 10 write :
>>> int("10", 2)
2
Pierre
Johan Geldenhuys a écrit :
Hi everybody,
I used binary.py and is a bit puzzled by the results I get when comparing the binary of decimal 2 and the value I get when I convert the binary to an int.
>>> binary(2)
'0010'
>>> int(0010)
8
>>>
Isn't the int value of this
Ah, thanks all. I wasn't thinking of base 2 numbers like base 10 -
when you describe it like that, I get i. (100 = 10^2 + 0*10^1 +
0*10^0) I was thinking strictly in terms of a base 10 number described
by flags for each power of 2, which (to me) would logically start from
2^0 and go right.
And yea
> While I jest somewhat, that highlights a serious deficiency in my
> education that becomes more and more apparent, which is in maths.
Yes, its a sad fact. Good programming beyond basics does require a
modicum of maths. You can learnn enough to do useful things without
math, but there reaches a p
On 6 Feb 2005, [EMAIL PROTECTED] wrote:
> Actually, generating the digits from the right complicates the algorithm quite
> a bit. It's hidden in
> the Python version, but s = str(i % 2) + s is a relatively expensive
> operation here - it has to copy
> all of s to make room for the new dig
Liam Clarke wrote:
4 is 001 (on a continuum of 2^0 to 2^n), but using the above approach
we get 100.
?? 4 (decimal) is 100 (binary). Not because of how the conversion algorithm works, but because that
is how we write numbers. The least-significant digit is always the rightmost digit. 001 is 1 in
On Feb 6, 2005, at 08:59, Liam Clarke wrote:
Ah, yeah, gotta get me one of those textbooks.
(Wait a minute, that would mean, my approach wasn't the textbook
approach... /me salvages a little pride.)
While I jest somewhat, that highlights a serious deficiency in my
education that becomes more and mo
Ah, yeah, gotta get me one of those textbooks.
(Wait a minute, that would mean, my approach wasn't the textbook
approach... /me salvages a little pride.)
While I jest somewhat, that highlights a serious deficiency in my
education that becomes more and more apparent, which is in maths.
Sheesh, if I
Liam,
> Just looking at this -
> i = 456
> s = ''
> while i:
> s = str(i % 2) + s
> i/=2
>
> This works, far simpler than mine, which is always infuriating, but
my
> question is, how exactly?
This is the classic math treatment of how to calculate a binary
number.
Just keep dividing by two
Liam Clarke wrote:
Just looking at this -
i = 456
s = ''
while i:
s = str(i % 2) + s
i/=2
This works, far simpler than mine, which is always infuriating, but my
question is, how exactly?
if I have the number 15, when it divides by 2, it will become 7. Yet
no error is introduced into the bin
Liam Clarke wrote:
Sandip -
Just looking at this -
i = 456
s = ''
while i:
s = str(i % 2) + s
i/=2
This works, far simpler than mine, which is always infuriating, but my
question is, how exactly?
if I have the number 15, when it divides by 2, it will become 7. Yet
no error is introduced
Oh... and while I hate to use acronyms like this, I did indeed LOL.
What happened was, I was feeding the strings I got out into the
Windows calculator to check it was working.
And they worked if they went backwards, and I was wondering why, and I
vaguely recalled something I read in a Java book a
Tamm, Heiko wrote:
Ok, thank you.
Does anybody know how to convert a HEX into a BINARY?
Just trying my hand out on python : To convert the value of i to binary:
==
i = 456
s = ''
while i:
s = str(i % 2) + s
i/=2
print s
=
in case you have i in the form of
Liam,
I think you misunderstand what endianness is.
Big-endian and little-endian refer to the way a number is stored as bytes in the underlying memory
of the computer. This is not something you generally need to worry about in a Python program.
For example, consider the number 0x12345678. On most
> > unfortunately Python doesn't support binary in
> > its string formatting(although it does in int()!
>
> Uh, question. Why not? It seems that all simple types should be
included.
I agree it has always seemed bizarre that inary is not included
but octal is, IMHO binary is more useful as a repres
Jacob - just for you, begin your agitation for the next release please ;)
binstring.py, as attached.
(also pasted up - http://www.rafb.net/paste/results/5feItM57.html)
Creating this, was just a brain teaser, but I was thinking 'what if I
wanted to make this for the standard library.'
And so you
The binary value is the same as the hex value.
The binary representation is 00010100, but
unfortunately Python doesn't support binary in
its string formatting(although it does in int()!
Uh, question. Why not? It seems that all simple types should be included.
Since the computer stores it as bin
> Does anybody know how to convert a HEX into a BINARY?
The easiest way I know is to use a lookup table on
the octal representation.
def bin(n):
bins = ['000','001','010,'011','111']
result = ''
for c in oct(n):
result += bins[int(c,8)]
return result
HTH,
Alan G
Author
> But I'm looking for a solution to convert a Hex number
> into binary, decimal, interger numbers.
WE need to be very specific about our terminology here.
All numbers in the computer are stored in binary.
Only the string representation on the screen is
in decimal, octal, hex etc.
> What is the
> I like to know, if it's possible to convert a Hex number into
> String or other formats?
Use the string format operator:
>>> print "%X" % 0xB5
B5
>>> print "%X" % 181
B5
Lowercase '%x' uses lowercase letters on output...
Or use the int() function with a base argument to go the other way:
>
t; Heiko
>
> -Original Message-
> From: Pierre Barbier de Reuille [mailto:[EMAIL PROTECTED]
> Sent: Friday, February 04, 2005 2:55 PM
> To: Tamm, Heiko
> Subject: Re: [Tutor] Hex to Str - still an open issue
>
> Oh ! You meant the other way around ?
>
> If
more
guesses.
Kent
Tamm, Heiko wrote:
Ok, thank you.
Does anybody know how to convert a HEX into a BINARY?
Best regards
Heiko
-Original Message-
From: Pierre Barbier de Reuille [mailto:[EMAIL PROTECTED]
Sent: Friday, February 04, 2005 2:55 PM
To: Tamm, Heiko
Subject: Re: [Tutor] Hex t
Ok, thank you.
Does anybody know how to convert a HEX into a BINARY?
Best regards
Heiko
-Original Message-
From: Pierre Barbier de Reuille [mailto:[EMAIL PROTECTED]
Sent: Friday, February 04, 2005 2:55 PM
To: Tamm, Heiko
Subject: Re: [Tutor] Hex to Str - still an open issue
PM
To: Tamm, Heiko
Cc: tutor@python.org
Subject: Re: [Tutor] Hex to Str
Given you have a number in 'a' :
hex(a)
returns the hexadecimal representation of 'a' as a string !
You can also try :
"%x" % a
After that, I don't know if there is some builtin to print a nu
ginal Message-
From: Pierre Barbier de Reuille [mailto:[EMAIL PROTECTED]
Sent: Friday, February 04, 2005 2:35 PM
To: Tamm, Heiko
Cc: tutor@python.org
Subject: Re: [Tutor] Hex to Str
Given you have a number in 'a' :
hex(a)
returns the hexadecimal representation of 'a' as a
Hello Heiko,
I do not really know what you like to get, but the hex-number's in Python are
usedd
in a numeric representation. As far as I have seen in the interpreter, this
depends
on the value:
>>> a=0xabccddd
>>> type(a)
>>> a=0xaabb
>>> type(a)
If you like to see the nu
Use the hex() function to convert an integer to a hex string representation:
>>> hex(54)
'0x36'
>>> hex(0x54)
'0x54'
or for more control use %x string formatting:
>>> '%x' % 54
'36'
>>> '%04X' % 0xab
'00AB'
etc.
Kent
Tamm, Heiko wrote:
Hello,
I like to know, if it's possible to convert a Hex
Given you have a number in 'a' :
hex(a)
returns the hexadecimal representation of 'a' as a string !
You can also try :
"%x" % a
After that, I don't know if there is some builtin to print a number in
any base you want !
Pierre
Tamm, Heiko a écrit :
Hello,
I like to know, if it's possible to conv
Hello,
I like to
know, if it's possible to convert a Hex number into String or other
formats?
How can it
be done?
Kind
regards
Heiko
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