In python, list remove acts strangely -- two lests have elements removed

Asked Mar 29 '20 at 21:57

Active Mar 29 '20 at 21:59

Viewed 22 times

inC = list(range(6))
outC = list(range(2))
tx = inC
for j in range(0,len(outC)):
    tx.remove(outC[j])
print(inC, outC, tx)

Output:

[2, 3, 4, 5] [0, 1] [2, 3, 4, 5]

Notice that inC and tx both have 0 and 1 removed. Is this the way it is supposed to work?

edited Mar 29 '20 at 21:59

dcg

asked Mar 29 '20 at 21:57

user3362045

Variables hold **references** to objects. You have two variables referencing the same list. – Michael Butscher Mar 29 '20 at 22:00
`tx = inC` create reference, not copy – Olvin Roght Mar 29 '20 at 22:00
After `tx = inC`, both names refer to the same list. If you want a copy, you can do for example `tx = inC[:]` – Thierry Lathuille Mar 29 '20 at 22:01

0 Answers0