Use the following command to remove stations.pynull characters from the file. This may be introduced by an error in your text editor.

sed -i 's/\x0//g' <目标文件>

Here it is:

sed -i 's/\x0//g' stations.py

Additionally, considering that you are on a win system and there is no sed command; it is recommended that you copy the contents of the file to another place and then copy it back again.

You can refer to here if you have similar questions

http://stackoverflow.com/ques...