Comprehension in python dict or list

deletion_of_keys_in_dict_correctly.py

list_ = list(range(6))

for idx, val in enumerate(list_):
    print(idx, val)
    if idx%2: #we think we wrote code that deletes every item at odd indices
        del list_[idx]

print(list_)

#compare to
list_ = list(range(6))
new_list = [val for idx, val in enumerate(list_) if not idx%2]
print(new_list)