python建模的步骤_python基础教程之Python 建模步骤|python基础教程|python入门|python教程...

#%%#载入数据 、查看相关信息

importpandas as pdimportnumpy as npfrom sklearn.preprocessing importLabelEncoderprint('第一步：加载、查看数据')

file_path= r'D:\train\201905data\liwang.csv'band_data= pd.read_csv(file_path,encoding='UTF-8')

band_data.info()

band_data.shape#%%#print('第二步：清洗、处理数据，某些数据可以使用数据库处理数据代替')#数据清洗:缺失值处理：丢去、#查看缺失值

band_data.isnull().sum

band_data=band_data.dropna()#band_data = band_data.drop(['state'],axis=1)#去除空格

band_data['voice_mail_plan'] = band_data['voice_mail_plan'].map(lambdax: x.strip())

band_data['intl_plan'] = band_data['intl_plan'].map(lambdax: x.strip())

band_data['churned'] = band_data['churned'].map(lambdax: x.strip())

band_data['voice_mail_plan'] = band_data['voice_mail_plan'].map({