Python file.write（）将退格写入文件

Question

如何使用python中的函数file.write（）将\\ b写入文件

尝试过file.write（'\\ b \\ b \\ b'）但它只会向我的文件中添加垃圾字符

 for path in data['paths']:
     file.write(path['method'] + '*')
     file.write(path['url'] + '*')
     for resources in path['resources']:
         file.write(resources['key'])
         file.write('\n'+'**')
     file.write('\b\b\b')

期望清除从行file.write('\\n'+'**')写入的**的最后一个实例

Answer 1

如果您以后想删除它们，请不要首先写\\n** 。

 for path in data['paths']:
     file.write(path['method'] + '*')
     file.write(path['url'] + '*')
     resources = '\n**'.join(x['key'] for x in path['resources'])
     if resources:
         file.write(resources)

从PYthon 3.8开始，您将能够将赋值和if语句结合在一起：

if resources := '\n**'.join(...):
    file.write(resources)