Question

我试图绘制一个数据帧，但我遇到了一些我不知道如何解决的错误。

Python代码：

    import numpy as np
    from datetime import date,time,datetime
    import pandas as pd
    import csv

    df = pd.read_csv('MainD2.csv', parse_dates=['Time_Stamp'], infer_datetime_format=True)


    df["Time_Stamp"] = pd.to_datetime(df["Time_Stamp"]) # convert to Datetime

    df_filter = df[df["Curr"].le(3.0)] # new df with less or equal to 0.5
    #print(df_filter)

    where = (df_filter[df_filter["Time_Stamp"].diff().dt.total_seconds() > 1] ["Time_Stamp"] - pd.Timedelta("1s")).astype(str).tolist() # Find where diff > 1 second
    df_filter2 = df[df["Time_Stamp"].isin(where)] # Create new df with those
    #print(df_filter2)
    df_filter2["AC_Input_Current"] = 0.0 # Set c1 to 0.0

    #df_filter2

    df = df.set_index("Time_Stamp")
    df_filter2 = df_filter2.set_index("Time_Stamp")
    df.loc[df_filter2.index] = df_filter2

    def getMask(start,end):
        mask = (df['Time_Stamp'] > start) & (df['Time_Stamp'] <= end)
        return mask;

    start = '2017-06-26 01:05:00'
    end = '2017-06-26 01:20:00'

    timerange = df.loc[getMask(start, end)]

    timerange.plot(x='Time_Stamp', y='AC_Input_Current', style='-', color='black')*

* ------------------ 绘图部分-------------------

timerange.plot(x='Time_Stamp', y='AC_Input_Current', style='-', color='black')

我在尝试绘图时遇到了这个错误：

KeyError: 'Time_Stamp'

问：Python CSV - 绘图时的键错误

0 个答案: