如何在python中将多行.txt文件分离并转换为双行

file = open('file.txt', 'r')

lines = file.readlines()

new_lines = []
for line in lines:
    line = line.strip()  # 去除行首尾的空白字符
    if line:  # 如果行不为空
        new_lines.append(line)  # 添加第一行
        new_lines.append('')  # 添加空行作为第二行

file.close()

file = open('file.txt', 'r')
lines = file.readlines()

new_lines = []
for line in lines:
    line = line.strip()
    if line:
        new_lines.append(line)
        new_lines.append('')

file.close()