On Aug 23, 5:44 am, defn noob <[EMAIL PROTECTED]> wrote:
> def letters():
> a = xrange(ord('a'), ord('z')+1)
> B = xrange(ord('A'), ord('Z')+1)
> while True:
> yield chr(a)
> yield chr(B)
>
> >>> l = letters()
> >>> l.next()
>
> Traceback (most recent call last):
> File "<pyshell#225>", line 1, in <module>
> l.next()
> File "<pyshell#223>", line 5, in letters
> yield chr(a)
> TypeError: an integer is required
>
>
>
> Any way to get around this?
The most direct translation on what you've done, with corrections, is
either this:
def letters():
a = xrange(ord('a'), ord('z') + 1)
B = xrange(ord('A'), ord('Z') + 1)
while True:
yield a
yield B
>>> l = letters()
>>> l.next()
xrange(97, 123)
or this:
def letters():
a = xrange(ord('a'), ord('z') + 1)
B = xrange(ord('A'), ord('Z') + 1)
while True:
yield [chr(char) for char in a]
yield [chr(char) for char in B]
>>> l = letters()
>>> l.next()
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
but my psychic ability guessed that you actually wanted this instead:
def letters():
a = xrange(ord('a'), ord('z') + 1)
B = xrange(ord('A'), ord('Z') + 1)
a = [chr(char) for char in a]
B = [chr(char) for char in B]
index = 0
while index < 26:
yield a[index]
yield B[index]
index += 1
>>> l = letters()
>>> l.next()
'a'
or possibly in a more pythonic style, using for:
def letters():
a = xrange(ord('a'), ord('z') + 1)
B = xrange(ord('A'), ord('Z') + 1)
for lower, upper in zip(a, B):
yield chr(lower)
yield chr(upper)
>>> l = letters()
>>> l.next()
'a'
paralelly, my psychic ability also tells me that you might prefer this
instead:
def letters():
a = xrange(ord('a'), ord('z') + 1)
B = xrange(ord('A'), ord('Z') + 1)
for lower, upper in zip(a, B):
yield chr(lower), chr(upper)
>>> l = letters()
>>> l.next()
('a', 'A')
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