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mapping function to vars

P: n/a
I need to map a function to several variables. I'm trying to use map
and lambda to do this. Here's my attempt...

#!/usr/bin/env python
from random import *

[fee, fye, foe, fum] = map(lambda n: random(), range(4))

print fee
print fye
print foe
print fum

....I'm essentially trying to map a function that takes no parameters to
a group of variables. This works, but pychecker complains about the
'n' parameter. Is there a better way to do this? TIA

Jul 18 '05 #1
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3 Replies


P: n/a
ja****@hotmail.com wrote:
I need to map a function to several variables. I'm trying to use map
and lambda to do this. Here's my attempt...

#!/usr/bin/env python
from random import *

[fee, fye, foe, fum] = map(lambda n: random(), range(4))
from random import random
fee = random()
fye = random()
foe = random(),
fum = random()
print fee
print fye
print foe
print fum
...I'm essentially trying to map a function that takes no parameters to
a group of variables. This works, but pychecker complains about the
'n' parameter. Is there a better way to do this? TIA


Jul 18 '05 #2

P: n/a
ja****@hotmail.com wrote:
I need to map a function to several variables. I'm trying to use map
and lambda to do this. Here's my attempt...

#!/usr/bin/env python
from random import *

[fee, fye, foe, fum] = map(lambda n: random(), range(4))

print fee
print fye
print foe
print fum

...I'm essentially trying to map a function that takes no parameters to
a group of variables. This works, but pychecker complains about the
'n' parameter. Is there a better way to do this? TIA

import random
fee, fye, foe, fum = [random.random() for _ in range(4)]
fee, fye, foe, fum

(0.39415235335694276, 0.43533547827112462, 0.47106288849970501,
0.87920678036897715)

I don't know pychecker well enough, but I think it ignores variables
named _, so I think you could also just switch your n with _.
Personally, I find the list comprehension much more readable.

Steve
Jul 18 '05 #3

P: n/a

Steven Bethard wrote:
ja****@hotmail.com wrote:
I need to map a function to several variables. I'm trying to use map
and lambda to do this. Here's my attempt...

#!/usr/bin/env python
from random import *

[fee, fye, foe, fum] = map(lambda n: random(), range(4))

print fee
print fye
print foe
print fum

...I'm essentially trying to map a function that takes no parameters to a group of variables. This works, but pychecker complains about the 'n' parameter. Is there a better way to do this? TIA

>>> import random
>>> fee, fye, foe, fum = [random.random() for _ in range(4)]
>>> fee, fye, foe, fum

(0.39415235335694276, 0.43533547827112462, 0.47106288849970501,
0.87920678036897715)

I don't know pychecker well enough, but I think it ignores variables
named _, so I think you could also just switch your n with _.
Personally, I find the list comprehension much more readable.

Steve


Thanks! This is exactly what I was after :)

Jul 18 '05 #4

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