在python中的文件中写入多行

Question

我有以下代码:

line1 = raw_input("line 1: ")
line2 = raw_input("line 2: ")
line3 = raw_input("line 3: ")
print "I'm going to write these to the file."
target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")

这里target是文件对象,line1,line2,line3是用户输入.我想只使用一个target.write()命令来编写这个脚本.我尝试过使用以下内容:

target.write("%s \n %s \n %s \n") % (line1, line2, line3)

但是不是将字符串放在另一个字符串中但是如果我使用以下内容:

target.write(%s "\n" %s "\n" %s "\n") % (line1, line2, line3)

Python解释器(我使用的是Microsoft Powershell)说的语法无效.我怎么能这样做？

Answer 1

你的大括号令人困惑.像这样做:

target.write("%s \n %s \n %s \n" % (line1, line2, line3))

甚至更好,使用writelines:

target.writelines([line1, line2, line3])

Answer 2

with open('target.txt','w') as out:
    line1 = raw_input("line 1: ")
    line2 = raw_input("line 2: ")
    line3 = raw_input("line 3: ")
    print("I'm going to write these to the file.")
    out.write('{}\n{}\n{}\n'.format(line1,line2,line3))

Answer 3

另一种方式，至少对我来说，似乎更直观：

target.write('''line 1
line 2
line 3''')