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 one year ago
Hi, I'm looking at the code for lecture 4, the last program, and am seeking a bit of clarification on the construct:
divisors = divisors + (i,)
Why does this create a list instead of a sum? Is it because of the () and ,? or does it change the type to str?
(full code below) Thanks!
# calculates all possible factors of x
x = 100
divisors = ()
for i in range(1, x):
if x%i == 0:#if there's no remainder
divisors = divisors + (i,)# create csv list of divisors used
print divisors
print divisors[0] + divisors[1]
print divisors[2:4]#prints divisors in range between positi
 one year ago
Hi, I'm looking at the code for lecture 4, the last program, and am seeking a bit of clarification on the construct: divisors = divisors + (i,) Why does this create a list instead of a sum? Is it because of the () and ,? or does it change the type to str? (full code below) Thanks! # calculates all possible factors of x x = 100 divisors = () for i in range(1, x): if x%i == 0:#if there's no remainder divisors = divisors + (i,)# create csv list of divisors used print divisors print divisors[0] + divisors[1] print divisors[2:4]#prints divisors in range between positi

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Richard_C
 one year ago
Best ResponseYou've already chosen the best response.0"divisors = ()" defines that it is a tuple. A tuple consists of a number of values separated by commas.

Kilgore
 one year ago
Best ResponseYou've already chosen the best response.0Cool, Thanks. That clears it up. So, when you add to a tuple, you just put another piece of data into the list of values. Thanks again, Kilgore

bwCA
 one year ago
Best ResponseYou've already chosen the best response.1nope, when you add to tuple you create a new tuple that includes the old and new item(s). ``` >>> >>> T = (1,2) >>> id(T) 42281760 >>> T1 = T + (3,) >>> id(T1) 42481184 >>> T (1, 2) >>> T1 (1, 2, 3) >>> T2 = T1 + () >>> T1 (1, 2, 3) >>> T2 (1, 2, 3) >>> T1 == T2 True >>> T1 is T2 False >>> id(T1), id(T2) (42481184, 42482624) >>> ```

Kilgore
 one year ago
Best ResponseYou've already chosen the best response.0Cool, thanks for the demo. Between that, and some more reading, I should be well on my way (at least with this question). Thanks again
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