Python如何向文本文件添加列

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

lines = file.readlines()

new_lines = []
for line in lines:
    line = line.strip()  # 去除行尾的换行符
    columns = line.split(",")  # 使用逗号分隔每一行的列
    new_column = "new_value"  # 新列的值
    columns.append(new_column)  # 添加新列
    new_line = ",".join(columns)  # 将列重新组合为一行
    new_lines.append(new_line)  # 将新行添加到新的行列表中

file.writelines(new_lines)

file.close()

file = open("file.txt", "a")
lines = file.readlines()

new_lines = []
for line in lines:
    line = line.strip()
    columns = line.split(",")
    new_column = "new_value"
    columns.append(new_column)
    new_line = ",".join(columns)
    new_lines.append(new_line)

file.writelines(new_lines)
file.close()