【Python】pandas 读取 后向轨迹文件

import pandas as pd
from pathlib import Path


def backwardtrace(file: str):
    if not Path(file).is_file():
        raise ValueError('File does not exist!')
    else:
        res = []
        with open(file) as f:
            line = f.readline()
            if line[0:4] != 'time':
                raise ValueError('File fields are not uniform!')
            sep = line[4:5]  # 获取分割字符
        df = pd.read_csv(file, sep=sep)
        for row in df.itertuples(index=True, name="Pandas"):
            # print(row)
            res.append({
                'time': getattr(row, 'time'),
                'lon': getattr(row, 'lon'),
                'lat': getattr(row, 'lat'),
                'alti': getattr(row, 'alti'),
                'line': getattr(row, 'line')
            })
        # res = json.dumps(res)
        return res