No, that's not true.
Whenever a collision happens, other bits are mixed in very fast.
Frank
Am 20.01.2012 13:08, schrieb Victor Stinner:
I'm surprised we haven't seen bug reports about it from users
of 64-bit Pythons long ago
A Python dictionary only uses the lower bits of a hash value. If your
dictionary has less than 2**32 items, the dictionary order is exactly
the same on 32 and 64 bits system: hash32(str)& mask == hash64(str)&
mask for mask<= 2**32-1.
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