python for with double test

[[EMAIL PROTECTED]]

hi all
the is a way for doing  a for with double test:
   example
 for i in range(0,10) and f==1:
  
  

thanx  everyone

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Re: python for with double test

[Peter Hansen]

[EMAIL PROTECTED] wrote:
 hi all
 the is a way for doing  a for with double test:
example
  for i in range(0,10) and f==1:
   

Not sure if you're asking a question, but is this what you are trying to 
do? :

if f == 1:
for i in range(0,10):
...

If not, please explain more carefully what you want, maybe with an 
example showing more than ... in the body so we'll understand better.

-Peter

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Re: python for with double test

[Szabolcs Nagy]

for i in range(0,10):
if f!=1: break
...

i=0
while i10 and f==1:
...
i+=1

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Re: python for with double test

[Alan Franzoni]

Il 30 Dec 2005 09:02:30 -0800, [EMAIL PROTECTED] ha scritto:

 hi all
 the is a way for doing  a for with double test:

what's a 'double test' exactly? :-)

'for' does no test, it just iterates over a list. If you want to execute
the iteration only if f is 1, do this:

if f==1:
for i in range(0,10):
...

if you want to use only certain values in the range, when the value of f[i]
(f may be a list, a dictionary, or whatever) is 1, you can use a list
comprehension:

for i in [x for x in range(0,10) if f[x]==1]:


of course, if you want to make it shorter, you can define a function
instead of the 'for' code block and use the list comprehension directly:

def myfunction(x):
...


[myfunction(x) for x in range(0,10) if f[x]==1]


and you'll end up with a list of the return values of myfunction.

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