Question

我定义了一个小函数，用于计算时间序列的一些摘要统计数据

def health(data):
    # remove all nan entries
    import pandas

    nav_daily = data.dropna()
    d = pandas.Series(index=['Valid', 'First', 'Last', 'Months'])

    d['Valid'] = nav_daily.size
    d['First'] = nav_daily.index[0]
    d['Last'] = nav_daily.index[-1]
    d['Months'] = nav_daily.resample(rule="M", how="last").size

    return d

如果将First和Last注释掉，则此方法有效。我不认为这里有大熊猫的问题。我收到错误消息：

 Traceback (most recent call last):
...
        d['First'] = nav_daily.index[0]
      File "H:\thomas\envPython\L01\lib\site-packages\pandas\core\series.py", line 640, in __setitem__
        self._set_with(key, value)
      File "H:\thomas\envPython\L01\lib\site-packages\pandas\core\series.py", line 680, in _set_with
        self._set_labels(key, value)
      File "H:\thomas\envPython\L01\lib\site-packages\pandas\core\series.py", line 691, in _set_labels
        % str(key[mask]))
    ValueError: ['F' 'i' 'r' 's' 't'] not contained in the index

我正在使用Windows 8.这是Ascii或“vs”等问题吗？

Python弄乱了一个字符串

0 个答案: