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From: Peter Otten <__peter__@web.de>
Subject: Re: Lists and Decimal numbers
Date: Wed, 20 Mar 2013 16:52 +0100
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Xref: csiph.com comp.lang.python:41605

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>