如何创建一个函数来打开文件进行写入，并让用户写入文件，当用户写入“stop”时，关闭文件？

Question

如何创建一个函数，1.打开一个文件进行写入，2.让用户在while循环中写入文本，然后使用（“\n”）向用户写入“stop”，然后循环转到步骤3.关闭文件

到目前为止我得到了这个

def writesomething(filename):
    file1=open("randomfile","w")
    file1.write("")
    file1.close()

Answer 1

首先收集所有的输入，然后用.join()一次写入

text = []
user = input('Enter text to write to file (\'quit\') to end: ')
text.append(user)
while user != 'quit':
    user = input('Enter text to write to file (\'quit\') to end: ')
    text.append(user)
res = '\n'.join(text)
with open('text.txt', 'w') as f:
    f.write(res)

Enter text to write to file ('quit') to end: vash
Enter text to write to file ('quit') to end: the
Enter text to write to file ('quit') to end: stampede
Enter text to write to file ('quit') to end: quit
chrx@chrx:~/python/stackoverflow/10.11$ cat text.txt
vash
the
stampede

Answer 2

您可以将^{}函数与stop哨兵一起使用，然后将生成的序列字符串与'\n'连接起来输出：

with open('randomfile', 'w') as f:
    f.write('\n'.join(iter(input, 'stop')))