Rooba
/
cpython
mirror of https://github.com/python/cpython.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

* Lib/whrandom.py: if seed is (0,0,0), initialize from current 

time; default seed's arguments to (0,0,0)
This commit is contained in:
Guido van Rossum 1994-09-14 13:33:57 +00:00
parent 602099a756
commit 14a6e3d5e8
1 changed files with 12 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
Lib/whrandom.py
View File

@ -35,24 +35,24 @@ class whrandom:
# Without arguments, initialize from current time.
# With arguments (x, y, z), initialize from them.
#
def __init__(self, x = None, y = None, z = None):
if x is None:
def __init__(self, x = 0, y = 0, z = 0):
self.seed(x, y, z)
#
# Set the seed from (x, y, z).
# These must be integers in the range [0, 256).
#
def seed(self, x = 0, y = 0, z = 0):
if not type(x) == type(y) == type(z) == type(0):
raise TypeError, 'seeds must be integers'
if not 0 <= x < 256 and 0 <= y < 256 and 0 <= z < 256:
raise ValueError, 'seeds must be in range(0, 256)'
if 0 == x == y == z:
# Initialize from current time
import time
t = int(time.time() % 0x80000000)
t, x = divmod(t, 256)
t, y = divmod(t, 256)
t, z = divmod(t, 256)
self.seed(x, y, z)
#
# Set the seed from (x, y, z).
# These must be integers in the range [0, 256).
#
def seed(self, x, y, z):
if not type(x) == type(y) == type(z) == type(0):
raise TypeError, 'seeds must be integers'
if not 0 <= x < 256 and 0 <= y < 256 and 0 <= z < 256:
raise ValueError, 'seeds must be in range(0, 256)'
self._seed = (x, y, z)
#
# Get the next random number in the range [0.0, 1.0).