Use the Python Debugger to find out, why the first code works and the second does not.

$($Extra: Try to find a way to fix the code.$)$

# Code Variant $1$

test$\_$list $=[1,2,3,4]$

results $=\{0\}$

for element in test$\_$list:

results.add $($element$)$

print $($results$)$

# Code Variant $2$

test$\_$list $=[1,2,3,4]$

results $=\{\}$

for element in test$\_$list:

results.add $($element$)$

print $($results$)$