I was trying to print a dot on console every second to indicates
running process, so I wrote, for example:
for i in xrange(10):
print ".",
time.sleep(1)
Idealy, a dot will be printed out each second. But there is nothing
print out until after 10 seconds, all 10 dots come out together.
I
I'm a bit confusing about whether "is not" equivelent to "!="
if a != b:
...
if a is not b:
...
What's the difference between "is not" and "!=" or they are the same thing?
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