Python一边读文件 一边写文件

Python一边读文件 一边写文件

```python
filepath = ""
def read_and_write():if ists(filepath):os.remove(filepath)for i in range(300):time.sleep(1)with open(filepath, "a") as f1:f1.write(str(i))with open(filepath, "r") as f2:adline())