我不确定如何解决我遇到的问题,我该如何解决?
我的python代码我正在使用:
import plotly
import plotly.plotly as py
import plotly.graph_objs as go
import plotly.figure_factory as FF
import numpy as np
from datetime import date,time,datetime
import pandas as pd
%matplotlib inline
import matplotlib.pyplot as plt
def readcsv(x): #def function to read csv files based on input below
Data = pd.read_csv(x, parse_dates=['Time_Stamp'], infer_datetime_format=True)
Data['Date'] = Data.Time_Stamp.dt.date
Data['Time'] = Data.Time_Stamp.dt.time
Data['Time_Stamp'] = pd.to_datetime(Data['Time_Stamp'])
print(Data[1:6])
readcsv('MainD.csv')
def selTimestamprange(dtStart, dtEnd, Data):
timestamprange = (Data['Time_Stamp'] > dtStart) & (Data['Time_Stamp'] <= dtEnd)
TimeRange = Data.loc(timestamprange)
TimeRange.plot(x='Time_stamp', y='AC_Input_Current', style='-', color='black')
date_string_start = '2017-06-13 16:00:00'
date_string_end = '2017-06-13 16:40:00'
dtStart = datetime.strptime(date_string_start, '%Y-%m-%d %H:%M:%S')
dtEnd = datetime.strptime(date_string_end,'%Y-%m-%d %H:%M:%S')
selTimestamprange(dtStart, dtEnd, Data)
我的错误:
NameError Traceback(最近一次调用 最后)in() 10 #print(type(dtStart))&lt; - 检查dtStart是否已转换为datetime类型 11 ---&GT; 12 selTimestamprange(dtStart,dtEnd,Data)
NameError:name&#39; Data&#39;未定义
答案 0 :(得分:0)
Data
是局部变量,仅在函数readcsv(x)
中可用,您可以在函数中返回它并将结果赋值给变量Data
,然后您可以使用变量{ {1}}。像这样:
Data