def list_to_int(numbers):
  """
  Converts a list of numbers into a single integer.
  Args:
    numbers: A list of integers.
  Returns:
    The integer formed by concatenating the digits of the numbers in the list.
  """
  # Convert each number to a string and concatenate them.
  digits_string = "".join(str(n) for n in numbers)
  # Convert the string to an integer.
  return int(digits_string)

个字符
此函数首先遍历数字列表并将每个数字转换为字符串。然后，它将所有字符串连接在一起以形成单个字符串。最后，它将字符串转换为整数。

将每一项乘以10的幂，然后求和

x = [2, 1, 3, 0]
y = sum(num * 10 ** i for i, num in enumerate(reversed(x)))
print(x, "==>", y)

个字符