如何比较数据框日期与行和列的值,使工作日和节假日分开

时间:2018-10-09 09:45:51

标签: python pandas datetime dataframe weekday

我有一个表示这个的数据框:

我需要创建另一列'Mark',这就是为什么它很复杂的原因。 对于值'C',执行日为Sunday 8/11/2018。第二天是Monday 9/11/2018。 因此,我需要计算weekdays的{​​{1}}值。对于这种情况,我需要计算previous week1/11/20182/11/20183/11/20184/11/2018

但是,如果5/11/2018的{​​{1}}是next dayexecution day,则需要取上一周的值Friday和{{1 }}。例如,Saturday'Friday'上执行。第二天是“星期五”。因此,我需要计算前一周'Saturday'BThursday 12/11/2018'

的平均值

最初我没有Friday列,我使用来添加后缀

Saturday

如果6/11/20187/11/2018之一匹配,我就可以打印出一些东西。这是代码-

Day

我正在尝试自己学习python,并且已经开始学习df['Execution']=pd.to_datetime(df['Execution']) df['Day']=df['Execution'].dt.weekday_name
但是,现在我迷路了,无法弄清楚继续进行的逻辑。有人可以启发我吗?

1 个答案:

答案 0 :(得分:0)

以下是对我有用的代码,并带有解释:

for i,row in df.iterrows():
  for j, val in enumerate (range(0,l1-1)):   #l1 is the number of columns 
               #subtracted 1 to not take last column in account as I only need the dates

    if df.columns[j+1]==row['Execution']: #to match the date of column execution,with the column dates

        a=pd.to_datetime(df.columns[j+1+1])
        a=a.day_name() #to convert the date in to weekday name
#As for friday I would need previous week's friday and saturday values.
#Therefore, I subtracted 7 and 8 to get the required value. For all the other days I calculated carefully this way so that I get the days right.
        if (a=='Friday'): 
            mark=(df.iloc[i,(j+1+1-7)]+df.iloc[i,(j+1+1-6)])/2
#df.iloc(row,column) was used to get the values right
            markList.append(mark)
        elif (a=='Saturday'):
            mark=(df.iloc[i,(j+1+1-7)]+df.iloc[i,(j+1+1-8)])/2
            markList.append(mark)
        elif (a=='Sunday'):
            mark=(df.iloc[i,(j+1+1-7)]+df.iloc[i,(j+1+1-6)]+df.iloc[i,(j+1+1-5)]+MPDr.iloc[i,(j+1+1-4)]+df.iloc[i,(j+1+1-3)])/5
            markList.append(mark)
        elif (a=='Monday'):
            mark=(df.iloc[i,(j+1+1-7)]+df.iloc[i,(j+1+1-6)]+df.iloc[i,(j+1+1-5)]+df.iloc[i,(j+1+1-4)]+df.iloc[i,(j+1+1-8)])/5
            markList.append(mark)
        elif (a=='Tuesday'):
            mark=(df.iloc[i,(j+1+1-7)]+df.iloc[i,(j+1+1-6)]+df.iloc[i,(j+1+1-5)]+df.iloc[i,(j+1+1-8)]+df.iloc[i,(j+1+1-9)])/5
            markList.append(mark)
        elif (a=='Wednesday'):
            mark=(df.iloc[i,(j+1+1-7)]+df.iloc[i,(j+1+1-6)]+df.iloc[i,(j+1+1-8)]+df.iloc[i,(j+1+1-9)]+df.iloc[i,(j+1+1-10)])/5
            markList.append(mark)  
        elif (a=='Thursday'):
            mark=(df.iloc[i,(j+1+1-7)]+df.iloc[i,(j+1+1-8)]+df.iloc[i,(j+1+1-9)]+df.iloc[i,(j+1+1-10)]+df.iloc[i,(j+1+1-11)])/5
            markList.append(mark)

df['mark']=markList #To add at the end of the dataframe