我正在使用Pandas计算两个持续时间之间的时间差。
函数是:
def time_calc(dur1, dur2):
date1 = pd.to_datetime(pd.Series(dur2))
date2 = pd.to_datetime(pd.Series(dur1))
df = pd.DataFrame(dict(ID = ids, DUR1 = date2, DUR2 = date1))
df1 = pd.DataFrame(dict(ID = ids, Duration1 = date2, Duration2 = date1))
df1['Duration1'] = df['DUR1'].dt.strftime('%H:%M:%S.%f')
df1['Duration2'] = df['DUR2'].dt.strftime('%H:%M:%S.%f')
cols = df.columns.tolist()
cols = ['ID', 'DUR1', 'DUR2']
df = df[cols]
df['diff_seconds'] = df['DUR2'] - df['DUR1']
df['diff_seconds'] = df['diff_seconds']/np.timedelta64(1,'s')
df['TimeDelta'] = df['diff_seconds'].apply(lambda d: str(datetime.timedelta(seconds=abs(d))))
df3 = df1.merge(df, on='ID')
cols = df3.columns.tolist()
cols = ['ID', 'Duration1', 'Duration2', 'TimeDelta', 'diff_seconds']
df3 = df3[cols]
print(df3)
数学为:Duration2-Duration1=TimeDelta
该函数很好地完成了
Duration1 Duration2 TimeDelta diff_seconds
00:00:23.999891 00:00:25.102076 0:00:01.102185 1.102185
00:00:43.079173 00:00:44.621481 0:00:01.542308 1.542308
但是,当Duration2 所以我需要执行的功能是将TimeDelta转换为负值,如下所示: 我想我需要以另一种方式转换“ TimeDelta”,但我的所有尝试都没有用。 如果有人可以帮助我,我将非常感激。 谢谢!Duration1 Duration2 TimeDelta diff_seconds
00:05:03.744332 00:04:58.008081 0:00:05.736251 -5.736251
Duration1 Duration2 TimeDelta diff_seconds
00:05:03.744332 00:04:58.008081 -0:00:05.736251 -5.736251
答案 0 :(得分:0)
我已经解决了这个问题。
制作一对一的时间戳选择逻辑,并将时间戳传递给“ time_convert”功能
df['diff_seconds'] = df['DUR2'] - df['DUR1']
df['diff_seconds'] = df['diff_seconds']/np.timedelta64(1,'s')
for i in df['diff_seconds']:
df['TimeDelta'] = time_convert(i)
如果秒为负数,time_convert函数仅将“-”附加到格式化的时间戳记上。
def time_convert(d):
if d > 0:
lst.append(str(datetime.timedelta(seconds=d)))
else:
lst.append('-' + str(datetime.timedelta(seconds=abs(d))))
然后,我刚刚使用lst创建了新的数据框,并将其合并在一起
df_t = pd.DataFrame(dict(ALERTS = alerts, TimeDelta = lst))
df_f = df_t.merge(df3, on='ID')
希望这对某人有帮助。