Hi,
I'm new to Python and have come across a problem I don't know how to
solve, enter com.lang.python :)
I'm writing some small apps to learn the language, and I like it a lot
so far.
My problem I've stumbled upon is that I don't know how to do what I
want. I want to do a loop in a loop. I think.
I've got two arrays with some random stuff in, like this.
array1 = ['one','two','th ree','four']
array2 = ['a','b','c','d']
I want to loop through array1 and add elements from array2 at the end,
so it looks like this:
one a
two b
three c
four c
I'm stuck. I know how to loop through the arrays separatly and print
them, but both at the same time? Hmmm.
A push in the right direction, anyone?
R,
SH
23  1731 
On Jan 17, 1:21 pm, Sacred Heart <scrd...@gmail. comwrote:
Hi,
I'm new to Python and have come across a problem I don't know how to
solve, enter com.lang.python :)
I'm writing some small apps to learn the language, and I like it a lot
so far.
My problem I've stumbled upon is that I don't know how to do what I
want. I want to do a loop in a loop. I think.
I've got two arrays with some random stuff in, like this.
array1 = ['one','two','th ree','four']
array2 = ['a','b','c','d']
I want to loop through array1 and add elements from array2 at the end,
so it looks like this:
one a
two b
three c
four c
I'm stuck. I know how to loop through the arrays separatly and print
them, but both at the same time? Hmmm.
A push in the right direction, anyone?
R,
SH
for i in zip(array1, array2):
print i
Although I take it you meant four d, the issue with this method is
that once you hit the end of one array the rest of the other one is
ignored.
On Jan 17, 1:35 pm, cokofree...@gma il.com wrote:
for i in zip(array1, array2):
print i
Although I take it you meant four d, the issue with this method is
that once you hit the end of one array the rest of the other one is
ignored.
Yes, small typo there.
Okey, so if my array1 is has 4 elements, and array2 has 6, it won't
loop trough the last 2 in array2? How do I make it do that?
R,
SH
On Jan 17, 2:35 pm, cokofree...@gma il.com wrote:
On Jan 17, 1:21 pm, Sacred Heart <scrd...@gmail. comwrote:
Hi,
I'm new to Python and have come across a problem I don't know how to
solve, enter com.lang.python :)
I'm writing some small apps to learn the language, and I like it a lot
so far.
My problem I've stumbled upon is that I don't know how to do what I
want. I want to do a loop in a loop. I think.
I've got two arrays with some random stuff in, like this.
array1 = ['one','two','th ree','four']
array2 = ['a','b','c','d']
I want to loop through array1 and add elements from array2 at the end,
so it looks like this:
one a
two b
three c
four c
I'm stuck. I know how to loop through the arrays separatly and print
them, but both at the same time? Hmmm.
A push in the right direction, anyone?
R,
SH
for i in zip(array1, array2):
print i
Although I take it you meant four d, the issue with this method is
that once you hit the end of one array the rest of the other one is
ignored.
You could always pre-pad the lists you are using before using the zip
function, kinda like
def pad(*iterables) :
max_length = 0
for each_iterable in iterables:
if len(each_iterab le) max_length: max_length =
len(each_iterab le)
for each_iterable in iterables:
each_iterable.e xtend([None for i in xrange(0,max_le ngth-
len(each_iterab le))])
pad(array1, array2, array3)
for i in zip(array1, array2, array3):
print i
What you could also do is create an index to use for it.
for i in xrange(0, length_of_longe st_list):
try: print array1[i]
except IndexError: pass
try: print array2[i]
except IndexError: pass
On Jan 17, 2:52 pm, Chris <cwi...@gmail.c omwrote:
On Jan 17, 2:35 pm, cokofree...@gma il.com wrote:
On Jan 17, 1:21 pm, Sacred Heart <scrd...@gmail. comwrote:
Hi,
I'm new to Python and have come across a problem I don't know how to
solve, enter com.lang.python :)
I'm writing some small apps to learn the language, and I like it a lot
so far.
My problem I've stumbled upon is that I don't know how to do what I
want. I want to do a loop in a loop. I think.
I've got two arrays with some random stuff in, like this.
array1 = ['one','two','th ree','four']
array2 = ['a','b','c','d']
I want to loop through array1 and add elements from array2 at the end,
so it looks like this:
one a
two b
three c
four c
I'm stuck. I know how to loop through the arrays separatly and print
them, but both at the same time? Hmmm.
A push in the right direction, anyone?
R,
SH
for i in zip(array1, array2):
print i
Although I take it you meant four d, the issue with this method is
that once you hit the end of one array the rest of the other one is
ignored.
You could always pre-pad the lists you are using before using the zip
function, kinda like
def pad(*iterables) :
max_length = 0
for each_iterable in iterables:
if len(each_iterab le) max_length: max_length =
len(each_iterab le)
for each_iterable in iterables:
each_iterable.e xtend([None for i in xrange(0,max_le ngth-
len(each_iterab le))])
pad(array1, array2, array3)
for i in zip(array1, array2, array3):
print i
What you could also do is create an index to use for it.
for i in xrange(0, length_of_longe st_list):
try: print array1[i]
except IndexError: pass
try: print array2[i]
except IndexError: pass
couldn't you just do something like
if len(array1) is not len(array2):
if len(array1) < len(array2):
max_length = len(array2) - len(array1)
array1.extend([None for i in xrange(0, max_length)])
elif len(array1) len(array2):
max_length = len(array1) - len(array2)
array2.extend([None for i in xrange(0, max_length)])
for i in zip(array1, array2):
print i
Though my case only really works for these two, whereas yours can be
used on more than two lists. :)
Sacred Heart a écrit :
On Jan 17, 1:35 pm, cokofree...@gma il.com wrote:
>for i in zip(array1, array2):
print i
Although I take it you meant four d, the issue with this method is
that once you hit the end of one array the rest of the other one is
ignored.
Yes, small typo there.
Okey, so if my array1 is has 4 elements, and array2 has 6, it won't
loop trough the last 2 in array2? How do I make it do that?
<ot>
Please gentlemen: Python has no builtin type named 'array', so
s/array/list/g
</ot>
Just pad your shortest list.
>
Yes, small typo there.
Okey, so if my array1 is has 4 elements, and array2 has 6, it won't
loop trough the last 2 in array2? How do I make it do that?
<ot>
Please gentlemen: Python has no builtin type named 'array', so
s/array/list/g
</ot>
Just pad your shortest list.
I agree, but was merely showing how he would use the variables he had
given.
Chris <cw****@gmail.c omwrote:
You could always pre-pad the lists you are using before using the zip
function, kinda like
def pad(*iterables) :
max_length = 0
for each_iterable in iterables:
if len(each_iterab le) max_length: max_length =
len(each_iterab le)
for each_iterable in iterables:
each_iterable.e xtend([None for i in xrange(0,max_le ngth-
len(each_iterab le))])
pad(array1, array2, array3)
for i in zip(array1, array2, array3):
print i
Another option is to pad each iterator as it is exhausted. That way you
can use any iterators not just lists. e.g.
from itertools import cycle, chain
def paddedzip(*args , **kw):
padding = kw.get('padding ', '')
def generate_paddin g():
padders = []
def padder():
if len(padders) < len(args)-1:
padders.append( None)
while 1:
yield padding
while 1:
yield padder()
return zip(*(chain(it, pad)
for (it, pad) in zip(args, generate_paddin g())))
for i in paddedzip(xrang e(10), ['one', 'two', 'three', 'four'],
['a', 'b', 'c'], padding='*'):
print i
On 17 Jan, 13:21, Sacred Heart <scrd...@gmail. comwrote:
A push in the right direction, anyone?
for number,letter in zip(array1,arra y2):
print "%s %s" % (number,letter)
On 17 Jan, 14:38, Sacred Heart <scrd...@gmail. comwrote:
Okey, so if my array1 is has 4 elements, and array2 has 6, it won't
loop trough the last 2 in array2? How do I make it do that?
In that case your problem is the data. You'll either have to truncate
one array and/or pad the other.
Or is this what you want?
n = len(array1) if len(array1) < len(array2) else len(array2)
for number,letter in zip(array1[:n],array2[:n]):
print "%s %s" % (number,letter)
reminder = array1[n:] if len(array1) len(array2) else array2[n:]
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