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New restriction on pow(x, y, z): If z is not None, x and y must be of

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integer types, and y must be >= 0.  See discussion at
http://sf.net/tracker/index.php?func=detail&aid=457066&group_id=5470&atid=105470
This commit is contained in:
Tim Peters 2001-09-03 08:35:41 +00:00
parent 5d2b77cf31
commit 32f453eaa4
9 changed files with 79 additions and 49 deletions
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18
Lib/test/test_pow.py
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@ -64,6 +64,15 @@ def powtest(type):
for j in range(jl, jh+1):
for k in range(kl, kh+1):
if k != 0:
if type == float or j < 0:
try:
pow(type(i),j,k)
except TypeError:
pass
else:
raise TestFailed("expected TypeError from "
"pow%r" % ((type(i), j, k)))
continue
if compare(pow(type(i),j,k), pow(type(i),j)% type(k)):
raise ValueError, "pow(" +str(i)+ "," +str(j)+ \
"," +str(k)+ ") != pow(" +str(i)+ "," + \
@ -96,10 +105,6 @@ print `pow(-3L,3L) % -8`, `pow(-3L,3L,-8)`
print `pow(5L,2) % -8`, `pow(5L,2,-8)`
print
print pow(3.0,3.0) % 8, pow(3.0,3.0,8)
print pow(3.0,3.0) % -8, pow(3.0,3.0,-8)
print pow(3.0,2) % -2, pow(3.0,2,-2)
print pow(5.0,2) % -8, pow(5.0,2,-8)
print
for i in range(-10, 11):
@ -112,8 +117,3 @@ for i in range(-10, 11):
if j >= 0 and k != 0:
o = pow(long(i),j) % k
n = pow(long(i),j,k)
if o != n: print 'Long mismatch:', i,j,k
if i >= 0 and k != 0:
o = pow(float(i),j) % k
n = pow(float(i),j,k)
if o != n: print 'Float mismatch:', i,j,k