python del vs pandas drop [英] python del vs pandas drop
问题描述
我知道这可能是个争论不休的问题,但是出于pandas.drop
和python del
函数的考虑,这在大型数据集上的性能更好吗?
I know it might be old debate, but out of pandas.drop
and python del
function which is better in terms of performance over large dataset?
我正在使用python 3
学习机器学习,并且不确定使用哪个.我的数据为pandas
数据帧格式.但是python del
函数在python的built-in function
中.
I am learning machine learning using python 3
and not sure which one to use. My data is in pandas
data frame format. But python del
function is in built-in function
for python.
推荐答案
在10Mb的股票数据上对其进行了测试,得出以下结果:
tested it on a 10Mb data of stocks, got the following results:
使用以下代码进行丢弃
t=time.time()
d.drop(labels="2")
print(time.time()-t)
0.003617525100708008
0.003617525100708008
对于del在同一列上具有以下代码:
for del with the following code on the same column:
t=time.time()
del d[2]
print(time.time()-t)
我得到的时间是:
0.0045168399810791016
0.0045168399810791016
在不同的数据集和列上重新运行没有显着差异
reruns on different datasets and columns didn't make any significant difference
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