Seo is correct; in order to import random, you need the CPython standard
library in sys.path. There are 3 ways to do this:
1. Run IronPython from the standard library directory (the working
directory is in sys.path by default)
2. Append the standard lib directory to sys.path for invocation of
IronPython, e.g.:
import sys
sys.path.append(r'c:\Program Files\IronPython 2.6\Lib')
3. (Recommended) Set the environment variable IRONPYTHONPATH to point to
the standard lib directory
System.Random is implemented in terms of .NET integers, which are 32-bit. When
your script passed 9999999999, IronPython tried to represent it in 32 bits,
causing an arithmetic overflow. In a pinch, you can use slightly more
complicated logic to suit your needs, e.g.:
var_utmn = randgen.Next(100000000,1000000000) * 10 +
randgen.Next(9)
But using the CPython library is much cleaner :).
A final word of advice: Both standard libraries' random number generators use
the convention that the first argument is inclusive and the second is
exclusive. This means that your code will generate random numbers from
1000000000 to 9999999998, which may or may not be what you want.
Good luck,
- David
From: [email protected]
[mailto:[email protected]] On Behalf Of Adam Brand
Sent: Wednesday, June 24, 2009 5:22 PM
To: Discussion of IronPython
Subject: [IronPython] Random Number Generation
I feel newbish writing this, but I'm having problems generating random numbers
in IronPython.
I tried "import random" but that doesn't seem to work (module not found).
I tried creating a System.Random but when I run
var_utmn = randgen.Next(1000000000,9999999999) I get a buffer overflow.
Any ideas? The random number needs to be above those two numbers indicated
above.
Thanks,
Adam
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