On 27 Oct 2005 12:39:18 -0700, "EP" <[EMAIL PROTECTED]> wrote:
>How does Python execute something like the following
>
>oldPhrase="My dog has fleas on his knees"
>newPhrase=oldPhrase.replace("fleas",
>"wrinkles").replace("knees","face")
>
>Does it do two iterations of the replace method on the initial and then
>an intermediate string (my guess) -- or does it compile to something
>more efficient (I doubt it, unless it's Christmas in Pythonville... but
>I thought I'd query)
>
Here's a way to get an answer in one form:
>>> def foo(): # for easy disassembly
... oldPhrase="My dog has fleas on his knees"
... newPhrase=oldPhrase.replace("fleas",
... "wrinkles").replace("knees","face")
...
>>> import dis
>>> dis.dis(foo)
2 0 LOAD_CONST 1 ('My dog has fleas on his knees')
3 STORE_FAST 1 (oldPhrase)
3 6 LOAD_FAST 1 (oldPhrase)
9 LOAD_ATTR 1 (replace)
12 LOAD_CONST 2 ('fleas')
4 15 LOAD_CONST 3 ('wrinkles')
18 CALL_FUNCTION 2
21 LOAD_ATTR 1 (replace)
24 LOAD_CONST 4 ('knees')
27 LOAD_CONST 5 ('face')
30 CALL_FUNCTION 2
33 STORE_FAST 0 (newPhrase)
36 LOAD_CONST 0 (None)
39 RETURN_VALUE
Regards,
Bengt Richter
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