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:

(Toggle Plain Text)

>>> 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

(Toggle Plain Text)

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?

(Toggle Plain Text)

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)'

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

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: 1,840 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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Programming Forums > Script Programming > Python

Integer Problems