Hey guys,
This is more of a python question, than a Django specific one, but it's been
bugging me for years now lol.
I'm trying to figure out if it is better to do imports at the top of the
file, or within the function/methods themselves.
I guess the questions I'm asking are:
- Is there any (serious) performance issues by doing imports every time
the function/method is called
- Is there a preferred style / guideline when it comes to imports? (maybe
a PEP somewhere?)
- Are relative imports discouraged? (from .. import package)
Obviously, the answers would depend on different scenarios, so I'm looking
for a discussion really, rather than a set in stone answer.
Example 1:
import os
def test():
print os.uname()
def test2():
print os.uname()
test()
test2()
Example 2:
import os
class test:
def test(self):
print os.uname()
Example 2:
class test:
def test(self):
import os
print os.uname()
def test2(self):
import os
print os.uname()
t = test()
t.test()
t.test2()
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