从示例脚本扫描字符串文字时出现 Python 错误 EOL

Question

I'm doing some network programming code learning using sample script and running into an error when execute the script. This is the function related

def calculateCost(data,rate):
        cost = 0
        if rate=='tx':
                transmitted = int(data["node-connector"][0]["opendaylight-port-statistics:flow-capable-node-connector-statistics"]["packets"]["transm$
                cost  = transmitted
        elif rate=='rx':
                received  = int(data["node-connector"][0]["opendaylight-port-statistics:flow-capable-node-connector-statistics"]["packets"]["received$
                cost  = received
        return cost

return error below

 File "main.py", line 26
    transmitted = int(data["node-connector"][0]["opendaylight-port-statistics:flow-capable-node-connector-statistics"]["packets"]["transm$
                                                                                                                                         ^
SyntaxError: EOL while scanning string literal

I noticed the line missing some bracket and quotn mark...but not sure if that is the problem... perhaps you guyz can help and advise me to correct it. Thank you for your help.

Answer 1

In python, a string in double quotes ( " ) cannot span more than one line. To do that you need to use triple quotes like: """foo bar""". In your case, at the end of the line beginning with transmitting it looks like the code got cut off where the $ sign is, so it is missing the closing " . This is true on the seventh line as well.