如何使用python从单独的文件中删除一行

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

lines = file.readlines()

file.close()

line_number = 3  # 要删除的行号
del lines[line_number - 1]  # 列表索引从0开始，所以要减去1

file = open("file.txt", "w")
file.writelines(lines)
file.close()

file = open("file.txt", "r")
lines = file.readlines()
file.close()

line_number = 3  # 要删除的行号
del lines[line_number - 1]

file = open("file.txt", "w")
file.writelines(lines)
file.close()