A problem
Hello
I use Python 3.7 to report errors when running this module:
```python
import tushare
import pandas as pd
import datetime

#Step 1: Get the ticket code online
Ticket_Raw_Data = tushare.get_stock_basics()
tickets = Ticket_Raw_Data.index.tolist()

#Step 2: save the ticket code
data_today = datetime.datetime.today().strftime("Y%M%D")
File = "F:\\ticket\\data\\ticketa-list CN"+data_today+".csv"
Ticket_Raw_Data.to_csv(File)
print("saved.")
```
Operation error reporting
```
Traceback (most recent call last):
  File "F:\ticket\programme\get-ticket-code.py", line 13, in <module>
    Ticket_Raw_Data.to_csv(File)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\core\frame.py", line 1745, in to_csv
    formatter.save()
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\io\formats\csvs.py", line 156, in save
    compression=self.compression)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\io\common.py", line 400, in _get_handle
    f = open(path_or_buf, mode, encoding=encoding)
FileNotFoundError: [Errno 2] No such file or directory: 'F:\\ticket\\data\\ticketa-list CNY0704/05/19.csv'
[Finished in 2.1s]
```
How to solve it? Help me. Thank you.