Die schnellste Methode list comprehension
verwendet, sind unten einige Fälle:
Fall 0:
l = ['2017-05-13 00:00:00', '2017-05-12 00:00:00', '2017-05-11 00:00:00']
start0 = time.time()
output = []
for data in l:
data = data.split(" ")[0]
output.append(data)
print(output)
print(time.time()-start0)
['2017-05-13', '2017-05-12', '2017-05-11']
5.602836608886719e-05
Fall 1: Mit lambda
und map()
:
l = ['2017-05-13 00:00:00', '2017-05-12 00:00:00', '2017-05-11 00:00:00']
start1 = time.time()
print(list(map(lambda x:x.split(" ")[0],l)))
print(time.time()-start1)
['2017-05-13', '2017-05-12', '2017-05-11']
3.504753112792969e-05
Fall 2: list comprehension
l = ['2017-05-13 00:00:00', '2017-05-12 00:00:00', '2017-05-11 00:00:00']
start2 = time.time()
print([i.split()[0] for i in l])
print(time.time()-start2)
['2017-05-13', '2017-05-12', '2017-05-11']
0.00010156631469726562
Dank sehr relevant –