Programming Forums > Script Programming > Python

sykkn · Aug 27th, 2005, 11:23 PM

Quote:

Originally Posted by bobfritzelpuff

I was just teaching myself python today, and I was writing a little program which required me to divide 12 by 5. The answer it returned was 2. I need the answer to be correct (2.4) in order for the program to work, yet I can not find out how to stop python giving me the floor of my answer. Is it supposed to do this, and how do I stop it?

Thanks.

try adding

(Toggle Plain Text)

from __future__ import division

it makes division give a float if necessary ... otherwise ... if you want a float, one of the members of your division statement must be a float.

bobfritzelpuff · Aug 27th, 2005, 11:59 PM

Thanks, I got that working. Now how do I generate a random number?

You know what would be helpful? Are there any webpages with a list of python commands and what syntax to use with them? That would be really helpful.

Thanks.

Silvanus · Aug 28th, 2005, 12:29 AM

The random module has what you're looking for. See http://docs.python.org/lib/module-random.html.

BTW, docs.python.org is where to look for python documentation.

OpenLoop · Aug 28th, 2005, 12:30 AM

have you tried www.python.org. They have good documentations and some tutorial for starters.

EDIT: oops, posted at the same time with Silvanos.

Moldz · Aug 28th, 2005, 8:26 AM

BTW - you could use the float() function to change the integer into a real number for division:

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>>> x = 12
>>> y = 5
>>> x/y
2
>>> x/float(y)
2.3999999999999999

Cerulean · Aug 28th, 2005, 12:07 PM

Quote:

BTW - you could use the float() function to change the integer into a real number for division:

Yeah, that works good and can be used for when you want to keep things as integers but get floating values after division.
Just a small nag - it doesn't "change" the variable. That implies that the float function changes the data type in-place, so after something like

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x = 1
float(x)

x will now be a float - 1.0. It does not do that, it just returns a floating point version of the int. So re-worded:

Quote:

BTW - you could use the float() function to get a float variable from the int

bobfritzelpuff · Aug 29th, 2005, 4:00 PM

When I type 'random(1,14)' it tells me "NameError: name 'random' is not defined". What am I doing wrong?

Cerulean · Aug 29th, 2005, 4:26 PM

Did you import the random module?

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import random

Once you've done that you use random.random, e.g 'random.random(1, 14)'

Sane · Aug 29th, 2005, 6:49 PM

I could have sworn it was " random.randrange(lower, upper) "

bobfritzelpuff · Aug 29th, 2005, 6:50 PM

Thanks. I got it working now.

Aug 28th, 2005, 8:26 AM	#15
Moldz Programmer Join Date: Feb 2005 Posts: 54 Rep Power: 4	BTW - you could use the float() function to change the integer into a real number for division: (Toggle Plain Text) >>> x = 12 >>> y = 5 >>> x/y 2 >>> x/float(y) 2.3999999999999999 >>> x = 12 >>> y = 5 >>> x/y 2 >>> x/float(y) 2.3999999999999999

Aug 29th, 2005, 4:26 PM	#18
Cerulean Professional Programmer Join Date: Apr 2005 Location: London, England Posts: 459 Rep Power: 4	Did you import the random module? (Toggle Plain Text) import random import random Once you've done that you use random.random, e.g 'random.random(1, 14)'

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Aug 27th, 2005, 11:59 PM	#12
bobfritzelpuff Newbie Join Date: Aug 2005 Posts: 5 Rep Power: 0	Thanks, I got that working. Now how do I generate a random number? You know what would be helpful? Are there any webpages with a list of python commands and what syntax to use with them? That would be really helpful. Thanks.

Aug 28th, 2005, 12:29 AM	#13
Silvanus Hobbyist Programmer Join Date: Aug 2005 Location: Hiding from... them... Posts: 110 Rep Power: 4	The random module has what you're looking for. See http://docs.python.org/lib/module-random.html. BTW, docs.python.org is where to look for python documentation.

Aug 28th, 2005, 12:30 AM	#14
OpenLoop Expert Programmer Join Date: May 2005 Location: East Lansing, MI Posts: 663 Rep Power: 4	have you tried www.python.org. They have good documentations and some tutorial for starters. EDIT: oops, posted at the same time with Silvanos.

Aug 29th, 2005, 4:00 PM	#17
bobfritzelpuff Newbie Join Date: Aug 2005 Posts: 5 Rep Power: 0	When I type 'random(1,14)' it tells me "NameError: name 'random' is not defined". What am I doing wrong?

Aug 29th, 2005, 6:49 PM	#19
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,886 Rep Power: 5	I could have sworn it was " random.randrange(lower, upper) "

Aug 29th, 2005, 6:50 PM	#20
bobfritzelpuff Newbie Join Date: Aug 2005 Posts: 5 Rep Power: 0	Thanks. I got it working now.

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Programming Forums > Script Programming > Python

Integer Problems