Как удалить из массива все нули в python?

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array = [15, 0, 7, 2, 84, 23, 0, 21, 62, 94, 0, 0, 0, 34, 47]

array_without_zero = [x for x in array if x != 0]

print(array_without_zero)

# Вывод : [15, 7, 2, 84, 23, 21, 62, 94, 34, 47]

# ----------------------------------------- ( Если первая не понятна )

array = [15, 0, 7, 2, 84, 23, 0, 21, 62, 94, 0, 0, 0, 34, 47]

array_without_zero = list()

for num in array:
    if (num != 0):
        array_without_zero.append(num)

print(array_without_zero)

# Вывод : [15, 7, 2, 84, 23, 21, 62, 94, 34, 47]

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array = [15, 0, 7, 2, 84, 23, 0, 21, 62, 94, 0, 0, 0, 34, 47]
array_without_zero = list(filter(lambda a: a != 0, array))

# Вывод: [15, 7, 2, 84, 23, 21, 62, 94, 34, 47]
print(array_without_zero)