Lists and Decimal numbers

Alister alister.ware at ntlworld.com
Wed Mar 20 20:20:57 CET 2013


On Wed, 20 Mar 2013 16:52:00 +0100, Peter Otten wrote:

> Ana Dionísio wrote:
> 
>> So, I have this script that puts in a list every minute in 24 hours
>> 
>> hour=[]
>> i=0 t=-(1.0/60.0)
>> while i<24*60:
>>     i = i+1 t = t+(1.0/60.0)
>>     hour.append([t])
> 
> In many cases you can write
> 
> for i in range(...):
>    ...
> 
> instead of incrementing manually.
>  
>> When it is doing the cicle it can have all the decimal numbers, but I
>> need to print the result with only 4 decimal numbers
>> 
>> How can I define the number of decimal numbers I want to print in this
>> case? For example with 4 decimal numbers, it would print:
>> 
>> 0.0000 0.0167 0.0333 ...
>> 
>> Can you help?
> 
> 
>>>> for i in range(24*60):
> ...     print "{:.4f}".format(i/60.0)
> ...
> 0.0000 0.0167 0.0333 0.0500 [...]
> 23.9500 23.9667 23.9833
>>>> 
>>>> 
> See also
> 
> <http://docs.python.org/2/library/string.html#format-specification-mini-
language>


and a list comprehension would streamline things further

t=[round(x*1.0/60),4 for x in range(1440)] #compatible with V2.7 & V3.0)

-- 
How many Zen Buddhist does it take to change a light bulb?

Two.  One to change it and one not to change it.



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