泰坦尼克数据集下载 训练集 测试集 导入需要的库 import matplotlib.pyplot as plt %matplotlib inline import numpy as np import pandas as pd 加载数据集 train_file = './data/titanic/train.csv' eval_file = './data/titanic/eval.csv' train_df = pd.read_csv(train_file) eval_df = pd.re