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[Solved] Can someone explain why the outputs are different here ?
Check this code, https://code.sololearn.com/cXs6wY2auuLV/?ref=app For the first loop i assign new values to row and col using a,b = val1, val2 For the second loop I use a = val1 b = val2 For some unknown reasons the outputs are different and from what the output is I see that it skips some iterations in between. I really don't understand why this is happening. Any answer is appreciated, thanks :)
6 Respostas
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I'm just waiting for some python expert to notice this
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In the first example, the values of "row" and "col" are the same for "data[row][col][0]" and "data[row][col][1]". This is because "row,col = ..." reassigns them simultaneosly.
In the second example, the value of "row" in "data[row][col][1]" is different than the one used in "data[row][col][0]" because you're reassigning "row" in line 23. Therefore, in line 24 you use the new value, not the old one.
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Diego oh .... How could I have not seen that, thanks.
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~ swim ~ (not available on messanger) the algorithm works fine on both now, but now I'm left with the above problem, why does that even happen when both are the same thing.
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~ swim ~ (not available on messanger) the list in the program above is generated by that algorithm, in the function I named tracePath() all the time I thought the bug was in the search function but then I realized that it was the while loop in the output function which was going wrong.
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This problem arissed when I was implementing A* algorithm, I made the c++ version then tried on python, and it took me more than 6 hours to figure out the bug was in the last loop.