数据挖掘实践（金融风控）-第二次任务

data_train = pd.read_csv(’./train.csv’)
data_test_a = pd.read_csv(’./testA.csv’)
data_train_sample = pd.read_csv("./train.csv",nrows=5)
#设置chunksize参数，来控制每次迭代数据的大小
chunker = pd.read_csv("./train.csv",chunksize=5)
for item in chunker:
print(type(item))
#<class ‘pandas.core.frame.DataFrame’>
print(len(item)) #5
data_test_a.shape