log.py 文件源码

def save(self):
        """Saves the logger's buffered points to a CSV file. If the file exists,
        then the data points are appended.
        """
        #We need to see if enough time has passed since the last
        from datetime import datetime
        from time import time
        if self.lastsave is not None:
            elapsed = (datetime.fromtimestamp(time()) -
                       datetime.fromtimestamp(self.lastsave)).total_seconds()
        else:
            elapsed = self.logfreq + 1

        if elapsed > self.logfreq:
            self._csv_append()
            self.lastsave = time()