python机器学习基础教程，P187
书中：
X= citibike.index.strftime("%s").astype("int").reshape(-1,1)
报错：
Int64Index([1438358400, 1438369200, 1438380000, 1438390800, 1438401600, 1438412400, 1438423200, 1438434000, 1438444800, 1438455600, ... 1440928800, 1440939600, 1440950400, 1440961200, 1440972000, 1440982800, 1440993600, 1441004400, 1441015200, 1441026000], dtype=‘int64‘, length=248) Traceback (most recent call last): File "/Users/tusvn/PycharmProjects/practice/citibike_feature_select_test.py", line 12, in <module> X= citibike.index.strftime("%s").astype("int").reshape(-1,1) AttributeError: ‘Int64Index‘ object has no attribute ‘reshape‘
修改：
X= citibike.index.strftime("%s").astype("int").values.reshape(-1,1)
'Int64Index' object has no attribute 'reshape'
原文：https://www.cnblogs.com/yimiyan/p/12294010.html