Number combinations

[placid]

Hi all,

Just wondering if there is a better way of generating a 4 digit number
(that gets converted to a string), ive got the following code which
generates strings between 0000-9999.

<code>

for a in range(0,10):
for b in range(0,10):
for c in range(0,10):
for d in range(0,10):
print "%s%s%s%s" %(str(a), str(b), str(c),str(d)

</code>


--Cheers

http://bulkan.googlepages.com/python

[Tim Chase]

Re: Number combinations

Just wondering if there is a better way of generating a 4 digit number

(that gets converted to a string), ive got the following code which
generates strings between 0000-9999.
>
<code>
>
for a in range(0,10):
for b in range(0,10):
for c in range(0,10):
for d in range(0,10):
print "%s%s%s%s" %(str(a), str(b), str(c),str(d)
>
</code>

Is there something wrong with

for i in xrange(0,10000) : print "%04i" % i

If you need the individual digits for something, you can use

for i in xrange(0,10000) :
d1,d2,d3,d4 = list("%04i" % i)
# do something with d1,d2,d3,d4

somewhat indelicate, but it works for me. :)

-tkc

[Kevin Watters]

Re: Number combinations

How about

print ["%04d" % x for x in xrange(10000)]

[Bruno Desthuilliers]

Re: Number combinations

placid wrote:

Hi all,
>
Just wondering if there is a better way of generating a 4 digit number
(that gets converted to a string), ive got the following code which
generates strings between 0000-9999.
>
<code>
>
for a in range(0,10):
for b in range(0,10):
for c in range(0,10):
for d in range(0,10):

You could reuse the same range...

print "%s%s%s%s" %(str(a), str(b), str(c),str(d)

And there's no need to convert to string here.

def parrot():
r = range(10)
return ["%s%s%s%s" % (a, b, c, d) \
for a in r \
for b in r \
for c in r \
for d in r]

But there's certainly better solutions...

--
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb@xiludom. gro'.split('@')])"

[Alex Martelli]

Re: Number combinations

placid <Bulkan@gmail.c omwrote:

Hi all,
>
Just wondering if there is a better way of generating a 4 digit number
(that gets converted to a string), ive got the following code which
generates strings between 0000-9999.
>
<code>
>
for a in range(0,10):
for b in range(0,10):
for c in range(0,10):
for d in range(0,10):
print "%s%s%s%s" %(str(a), str(b), str(c),str(d)

for n in xrange(10000):
print "%4.4d" % n


Alex

[Boris Borcic]

Re: Number combinations

Tim Chase wrote:
....

If you need the individual digits for something, you can use
>
for i in xrange(0,10000) :
d1,d2,d3,d4 = list("%04i" % i)

strings are sequences too, and you need only write

d1,d2,d3,d4 = "%04i" % i