def convert_scrd2rebin(score_card):
'''
该函数将已经生成的线上部署文档的2_评分卡(logistics和xgb通用)转换为rebin_spec过程，方便进行woe转换
配合
bin_obj = mt.BinWoe()；
X_cat_train = bin_obj.convert_to_category(data[selected], var_dict, rebin_spec)
woe_iv_df_coarse = bin_obj.calculate_woe_all(X_cat_train, y_train, var_dict, rebin_spec)
可以将离线数据进行分箱统计，包括逾期率以及分布
Args:
score_card(DataFrame):评分卡
Returns：
rebin_spec
'''
select_numerical = list(score_card[(score_card['中间层指标名称'].notnull())\
&(score_card['数据类型']!='varchar')]['中间层指标名称'].unique())
select_categorical = list(score_card[(score_card['中间层指标名称'].notnull())\
&(score_card['数据类型']=='varchar')]['中间层指标名称'].unique())
rebin_spec = {}
if len(select_numerical)>=1:
for i in select_numerical:
rebin_spec[i] = mt.BinWoe().obtain_boundaries(score_card[score_card['中间层指标名称'] == i].分箱)
if len(select_categorical)>=1:
for i in select_categorical:
cat_dict = {}
for j,k in enumerate(score_card[score_card['中间层指标名称']==i].分箱):
cat_dict[j+1] = k.split(',')
rebin_spec[i] = cat_dict
return rebin_spec
def variable_clustering(self, X_cat, woe_iv_df, n_clusters=15):
X_transformed = mt.BinWoe().transform_x_all(X_cat, woe_iv_df)
agglo = FeatureAgglomeration(n_clusters=n_clusters)
if len(X_transformed) > 20000:
X_agglo = X_transformed.sample(20000)
else:
X_agglo = X_transformed.copy()
agglo.fit(X_agglo)
vars_clusters = pd.DataFrame(data={'指标英文':X_transformed.columns.tolist(),
'cluster':list(agglo.labels_)})\
.sort_values('cluster')
return vars_clusters, X_transformed
def get_decile(score,
varscore,
all_Y,
y_col,
label,
RESULT_PATH,
manual_cut_bounds=[]):
"""
根据提供的score和Y相应的Y定义
Args:
score (pd.DataFrame): index is apply_id
all_Y (pd.DataFrame): should have ['Y_build', 'Y_fid14'], 'Y_build'
name can be changed. index is apply_id
y_col (str): column name of Y
label (str): sample set label
"""
merged_data = score.to_frame('score')\
.merge(all_Y, left_index=True, right_index=True)
merged_data = merged_data.loc[merged_data[y_col].notnull()]
if len(merged_data) > 10:
ks_decile = mt.Performance().calculate_ks_by_decile(merged_data.score, \
np.array(merged_data[y_col]), 'decile', 10,
manual_cut_bounds=manual_cut_bounds)
ks_decile.loc[:, 'sample_set'] = label
else:
ks_decile = pd.DataFrame()
varscore_new = varscore.merge(score.to_frame('score'),
left_index=True,
right_index=True)
if not ks_decile.empty:
if len(manual_cut_bounds) == 0:
manual_cut_bounds = mt.BinWoe().obtain_boundaries(
ks_decile['分箱'])['cut_boundaries']
varscore_new.loc[:,
'score_10bin'] = pd.cut(varscore_new.score,
manual_cut_bounds).astype(str)
bin_varscore_avg = varscore_new.groupby('score_10bin').mean()\
.reset_index()\
.rename(columns={'score_10bin': '分箱'})
ks_decile = ks_decile.merge(bin_varscore_avg, on='分箱')
return ks_decile, manual_cut_bounds
else:
return pd.DataFrame(), manual_cut_bounds
def approval_rate_anaysis(backscore, RESULT_PATH, model_label, y_col):
all_decile_df = pd.read_excel(os.path.join(RESULT_PATH, 'all_decile.xlsx'))
the_bool = ((all_decile_df.sample_set == 'RUNBOOK')
& (all_decile_df.model_label == model_label)
& (all_decile_df.Y_definition == y_col))
runbook = all_decile_df.loc[the_bool].copy()
point_bounds = mt.BinWoe().obtain_boundaries(
runbook['分箱'])['cut_boundaries']
backscore_cut = pd.cut(backscore, point_bounds).astype(str)
dist_ct = backscore_cut.value_counts().to_frame('样本量').sort_index().reset_index()\
.rename(columns={'index': '分箱'})
dist_ct.loc[:, '分布占比'] = dist_ct['样本量'] / dist_ct['样本量'].sum()
dist_ct = dist_ct.reset_index().rename(columns={'index': 'bin_order'})
dist_ct = dist_ct.merge(runbook[['分箱', '逾期率']], on='分箱', how='left')
dist_ct = dist_ct.sort_values('bin_order', ascending=False)
dist_ct.loc[:, 'ApprovalRate'] = dist_ct['分布占比'].cumsum()
dist_ct.loc[:, 'ApprovedBadRate'] = (
(dist_ct['分布占比'] * dist_ct['逾期率']).cumsum() / dist_ct['分布占比'].cumsum())
dist_ct.loc[:, 'model_label'] = model_label
return dist_ct
def score_stability(score_dict, all_Y, y_col, train_set_name, RESULT_PATH,
model_label):
"""
计算所有sample_set的score stability
Args:
score_dict (dict): the key is the label of the sample set. e.g. 'train',
'test', 'oot' etc. should be the save as data_cat_dict.keys()
The value is the scores. index is apply_id
all_Y (pd.DataFrame): should have ['Y_build', 'Y_fid14'], 'Y_build'
name can be changed. index is apply_id
y_col (str): column name of Y
"""
all_decile_df = pd.read_excel(os.path.join(RESULT_PATH, 'all_decile.xlsx'))
the_bool = ((all_decile_df.model_label == model_label)
& (all_decile_df.sample_set == train_set_name)
& (all_decile_df.Y_definition == y_col))
train_decile = all_decile_df.loc[the_bool].copy()
point_bounds = mt.BinWoe().obtain_boundaries(
train_decile['分箱'])['cut_boundaries']
d_list = []
compare_set_names = [
i for i in list(score_dict.keys()) if i != train_set_name
]
for label in compare_set_names:
logging.log(18, label + ' data set starts score PSI calculation')
tmp = mt.Performance().score_psi(score_dict[train_set_name]['score'],
score_dict[label]['score'],
point_bounds)
columns_order = tmp.columns
tmp.loc[:, 'compare_set'] = '%s_vs_%s' % (train_set_name, label)
d_list.append(tmp)
columns_order = ['model_label', 'compare_set'] + list(tmp.columns.values)
all_score_psi = pd.concat(d_list)
all_score_psi.loc[:, 'model_label'] = model_label
return all_score_psi[columns_order]
def generate_xgb_deployment_documents(model_label,
eda_table,
model_spec,
xgb_importance_score,
var_dict,
model_decile,
model_result,
RESULT_PATH,
test_case_data,
test_nums,
woe_iv_df_coarse,
production_name_map={}):
"""
生成XGBoost模型部署文档
Args
model_label (str): 模型名称
eda_table (dataFrame): EDA结果
model_spec (dataFrame): XGBoost输出数据和分箱明细.pkl 文件
xgb_importance_score (dataFrame): xgboost模型变量重要性排序
var_dict (dataFrame): 数据字典
model_decile(dataFrame): 建模decile
model_result (dict): 模型结果
RESULT_PATH (str): 结果路径
test_case_data(dataFrame): 生成testcase的测试数据, 如果用于部署, 请确保apply_id为index
test_nums(int):生成测试用例的数量
woe_iv_df_coarse(dataFrame): 建模粗分箱结果
production_name_map (dict): 当有指标英文线上的名字和线下建模时不一样时传入。key=建模时英文名
value=线上英文名。 default={} 默认建模时和线上没有命名不一致的情况
"""
if not os.path.exists(os.path.join(RESULT_PATH, 'deployment')):
os.makedirs(os.path.join(RESULT_PATH, 'deployment'))
DEPLOY_PATH = os.path.join(RESULT_PATH, 'deployment')
eda_table = eda_table
model_spec = model_spec
rebin_spec = model_spec['rebin_spec']
bin_to_label = model_spec['bin_to_label']
dummy_var_name_map = model_spec['dummy_var_name_map']
impt_writer = pd.ExcelWriter(
os.path.join(DEPLOY_PATH, '%s_variable_importance.xlsx' % model_label))
xgb_importance_score.to_excel(impt_writer, 'local', index=False)
impt_writer.save()
xgb_importance_score = xgb_importance_score
xgb_importance_score = xgb_importance_score.rename(
columns={
'feature': 'XGB衍生入模名称',
'fscore': '指标用于Split数据的数量',
'imp_pct': '指标用于Split数据的数量占比'
})
xgb_importance_score[['XGB变量转换类型', '中间层指标名称']] = xgb_importance_score['XGB衍生入模名称']\
.apply(lambda x: pd.Series(mt.BinWoe().xgboost_obtain_raw_variable(x, var_dict)))
xgb_importance_score['建模时指标名称'] = xgb_importance_score['中间层指标名称'].copy()
xgb_importance_score['建模时XGB衍生入模名称'] = xgb_importance_score[
'XGB衍生入模名称'].copy()
for original, new_name in production_name_map.items():
a = xgb_importance_score.loc[xgb_importance_score['建模时指标名称']==original, '建模时XGB衍生入模名称']\
.apply(lambda x: x.replace(original, new_name))
xgb_importance_score.loc[xgb_importance_score['建模时指标名称'] == original,
'XGB衍生入模名称'] = a
if original in rebin_spec:
rebin_spec[new_name] = rebin_spec.pop(original)
if original in bin_to_label:
bin_to_label[new_name] = bin_to_label.pop(original)
# 这一步很重要，要将字典里边的变量名也改掉，不然rebin_spec_json = mu.process_rebin_spec(rebin_spec, var_dict, num_variables+bin_variables)会出错
if original in list(var_dict['指标英文']):
var_dict['指标英文'].replace({original: new_name}, inplace=True)
xgb_importance_score['中间层指标名称'] = xgb_importance_score['中间层指标名称'].replace(
production_name_map)
xgb_importance_score = var_dict[['数据源', '指标英文', '指标中文', '数据类型']]\
.rename(columns={'指标英文':'中间层指标名称'})\
.merge(xgb_importance_score, on='中间层指标名称', how='right')
xgb_importance_score.insert(
5, '输出打分指标名称', xgb_importance_score['XGB衍生入模名称'].apply(
lambda x: 'mlr_' + str(x) + '_xgb_' + model_label))
xgb_importance_score = xgb_importance_score.append(
{'输出打分指标名称': 'mlr_creditscore_xgb_' + model_label}, ignore_index=True)
xgb_importance_score = xgb_importance_score.append(
{'输出打分指标名称': 'mlr_prob_xgb_' + model_label}, ignore_index=True)
model_decile = model_decile
selected_variables = xgb_importance_score['建模时指标名称'].unique()
model_eda = eda_table.loc[eda_table['指标英文'].isin(
selected_variables)].copy()
model_eda['指标英文'] = model_eda['指标英文'].replace(production_name_map)
woe_iv_df_coarse_copy = woe_iv_df_coarse.copy()
if len(production_name_map) > 0:
for j, k in production_name_map.items():
woe_iv_df_coarse_copy = woe_iv_df_coarse_copy.replace(j, k)
xgb_importance_score.rename(columns={'数据源': '指标分类'}, inplace=True)
xgb_importance_score_bin_result = pd.merge(xgb_importance_score.drop_duplicates('中间层指标名称')[['指标分类','中间层指标名称','XGB衍生入模名称','输出打分指标名称','指标用于Split数据的数量'\
,'指标用于Split数据的数量占比','XGB变量转换类型','建模时指标名称','建模时XGB衍生入模名称']]\
,woe_iv_df_coarse_copy,left_on='中间层指标名称',right_on='指标英文',how='left')\
[['指标分类','中间层指标名称','指标中文','XGB衍生入模名称','输出打分指标名称','指标用于Split数据的数量'\
,'指标用于Split数据的数量占比','XGB变量转换类型','建模时指标名称','建模时XGB衍生入模名称'\
,'数据类型','指标类型','分箱','分箱对应原始分类','N','分布占比','WOE','逾期率']]
xgb_importance_score_bin_result[
'分箱'] = xgb_importance_score_bin_result.apply(
lambda x: x['分箱对应原始分类'] if x['分箱对应原始分类'] else x['分箱'], axis=1)
xgb_importance_score_bin_result.drop(['分箱对应原始分类'], axis=1, inplace=True)
writer = pd.ExcelWriter(
os.path.join(DEPLOY_PATH, '%s部署文档.xlsx' % model_label))
xgb_importance_score_bin_result.to_excel(writer,
'2_模型变量重要性排序及分箱统计',
index=False)
model_decile.to_excel(writer, '3_模型decile', index=False)
model_eda.to_excel(writer, '4_模型EDA', index=False)
writer.save()
logging.info("""第六步部署：生成XGBoost部署文档。
1. 模型部署Excel文档存储于：%s
2. 需添加『0_文档修订记录』、『1_信息总览』页面。详见其他正式部署文档文件。并存储于『/Seafile/模型共享/模型部署文档/』相应文件夹中
""" % os.path.join(DEPLOY_PATH, '%s部署文档.xlsx' % model_label))
model_result = model_result
derive_name_map = dict(
zip(xgb_importance_score['建模时XGB衍生入模名称'],
xgb_importance_score['XGB衍生入模名称']))
xgbmodel = model_result['model_final']
var_list = []
for i in xgbmodel.__dict__['feature_names']:
try:
var_list.append(derive_name_map[i])
except:
var_list.append(i)
xgbmodel.__dict__['feature_names'] = var_list
if len(production_name_map) > 0:
var_list_copy = []
for i in var_list:
for j, k in production_name_map.items():
r = i.replace(j, k)
var_list_copy.append(r)
xgbmodel.__dict__['feature_names'] = var_list_copy
num_variables = list(xgb_importance_score.loc[
xgb_importance_score['XGB变量转换类型'] == 'num_vars_origin',
'中间层指标名称'].unique())
bin_variables = list(xgb_importance_score.loc[
xgb_importance_score['XGB变量转换类型'] == 'bin_vars', '中间层指标名称'].unique())
rebin_spec_json = mu.process_rebin_spec(rebin_spec, var_dict,
num_variables + bin_variables)
bin_to_label = {
k: v
for k, v in bin_to_label.items() if k in bin_variables
}
var_transform_method = {}
var_transform_method['num_vars_origin'] = num_variables
var_transform_method['bin_vars'] = bin_variables
var_transform_method['dummy_vars'] = {}
dummy_vars_df = xgb_importance_score.loc[xgb_importance_score['XGB变量转换类型']
== 'dummy_vars'].copy()
dummy_vars_df.loc[:, "dummy原始名称"] = dummy_vars_df['建模时XGB衍生入模名称'].apply(
lambda x: dummy_var_name_map[x])
dummy_vars_df.loc[:,
'dummy原始对应分类'] = dummy_vars_df.loc[:, "dummy原始名称"].apply(
lambda x: x.split('DUMMY')[-1])
for original_variable in dummy_vars_df['中间层指标名称'].unique():
cat_list = list(
dummy_vars_df.loc[dummy_vars_df['中间层指标名称'] == original_variable,
'dummy原始对应分类'].unique())
var_transform_method['dummy_vars'][original_variable] = cat_list
production_dummy_var_name_map = {}
for new_dummy_name, old_dummy_name in dummy_var_name_map.items():
if new_dummy_name != old_dummy_name:
if new_dummy_name.split('DUMMY')[0] in production_name_map:
var_name = new_dummy_name.split('DUMMY')[0]
prod_var_name = production_name_map[var_name]
production_dummy_var_name_map[old_dummy_name.replace(
var_name, prod_var_name)] = new_dummy_name.replace(
var_name, prod_var_name)
else:
production_dummy_var_name_map[old_dummy_name] = new_dummy_name
var_transform_method['dummy_var_name_map'] = production_dummy_var_name_map
save_data_to_json(rebin_spec_json, DEPLOY_PATH,
'%s_selected_rebin_spec.json' % model_label)
save_data_to_json(bin_to_label, DEPLOY_PATH,
'%s_bin_to_label.json' % model_label)
save_data_to_python2_pickle(xgbmodel, DEPLOY_PATH,
'%s_xgbmodel.pkl' % model_label)
save_data_to_json(var_transform_method, DEPLOY_PATH,
'%s_var_transform_method.json' % model_label)
''' 生成模型的testcase '''
if test_nums < len(test_case_data):
test_case_data_final = test_case_data[:test_nums]
else:
test_case_data_final = test_case_data.copy()
if len(production_name_map) > 0:
columns = []
for i in test_case_data_final.columns:
for j, k in production_name_map.items():
r = i.replace(j, k)
columns.append(r)
test_case_data_final.columns = columns
offline_model_score = pd.concat([model_result['p_train'].apply(mt.Performance()\
.p_to_score).to_frame('offline_model_score'),\
model_result['p_test'].apply(mt.Performance()\
.p_to_score).to_frame('offline_model_score')])
model_used_origin_features = [
i for i in list(set(xgb_importance_score['中间层指标名称']))
if str(i) != 'nan' and i != None
]
test_case_data_final_with_xgbScore = pd.merge(
test_case_data_final[model_used_origin_features],
offline_model_score,
left_index=True,
right_index=True)
def get_xgb_testcase(test_data, modelName, productName):
strs = ''' curl -d 'varparams={"modelName":"%s","productName":"%s","applyId": 123, ''' % (
modelName, productName)
for i, j in test_data.items():
strs = strs + '"%s"' % i + ':"%s"' % j + ', '
final = strs[:-2] + '''}' -X POST http://localhost:8080/modelInvoke'''
return final
test_case_data_final_with_xgbScore[
'test_case'] = test_case_data_final_with_xgbScore[
test_case_data_final_with_xgbScore.columns.difference(
['offline_model_score'])].to_dict('records')
test_case_data_final_with_xgbScore[
'curl_script'] = test_case_data_final_with_xgbScore['test_case'].apply(
get_xgb_testcase, args=(model_label, model_label))
test_case_data_final_with_xgbScore[[
'offline_model_score', 'curl_script'
]].to_csv(os.path.join(DEPLOY_PATH,
'%s_xgbmodel_testcase.csv' % model_label),
index=None)
'''为秒算模型部署平台生成测试用例'''
generate_xgb_testcases(model_label, test_case_data_final, var_dict,
DEPLOY_PATH, model_result)
logging.info("""第六步部署：生成XGBoost部署文档。
线上部署配置文件存储于%s路径下
1. %save_data_dict_to_pickle
2. %s
3. %s
4. %s
""" % (
DEPLOY_PATH,
'%s_selected_rebin_spec.json' % model_label,
'%sbin_to_label.json' % model_label,
'%s_var_transform_method.json' % model_label,
'%s_xgbmodel.pkl' % model_label,
))
# 相关性分析删除的变量
exclusion_cols = vif_result.corr_exclude_vars + vif_result.vif_dropvars
exclusion_cols
# # 调整粗分箱
selected = list(set(selected) - set(exclusion_cols))
selected
################################################################
#S9: 适用于逻辑回归的调分箱, 衍生bin_num, dummy变量的处理方式
################################################################
# ## 训练集按照新的rebin_spec进行分箱
#apply new bin cutting to the data
bin_obj = mt.BinWoe()
new_X = X_train[selected]
X_cat_train = bin_obj.convert_to_category(new_X, var_dict, rebin_spec)
woe_iv_df_coarse = bin_obj.calculate_woe_all(X_cat_train, y_train, var_dict,
rebin_spec)
# 字符型变量编码前的原始值写入粗分箱文件中
mt.add_origin_categorical_val(woe_iv_df_coarse, all_encoding_map)
# ##将woe_iv_df_coarse存储出去，为了部署监控使用
save_data_to_pickle(woe_iv_df_coarse, Result_path, 'woe_iv_df_coarse.pkl')
# ## 测试集按照新的rebin_spec进行分箱
new_X = X_test[selected]
X_cat_test = bin_obj.convert_to_category(new_X, var_dict, rebin_spec)
# # 按月查看训练集分箱以后的分布以及逾期率
# ## 将分好箱的数据与原数据中的y以及时间标识合并
def xgb_online_score_validity(data,input_vars,var_dict,var_transform_method,model_booster,model_decile,onLineScoreName):
'''
该函数为xgb模型上线以后统计是否存在缺失值未填充、打分错误以及PSI相关函数
Args:
data(DataFrame):其中表头必须含有apply_id,var_code,create_at字段,
大家严格按照部署监控时刻的要求撰写PSI监控时刻的SQL取数则不会出错，如果唯一标识不是apply_id，务必将唯一标识字段名修改为apply_id
input_vars(list):原始变量
var_dict(DataFrame)：数据字典
var_transform_method(json):部署时刻的变量转换文件
model_booster(booster):模型部署时刻的booster文件
model_decile(DataFrame):model建模时候的decile
onLineScoreName:xgb模型线上打分字段名
Returns：
data_input_vars_missing(DataFrame):未填充缺失值的所有apply
data_scored_applys_wrong(DataFrame):打分错误明细
model_decile_summary(DataFrame):模型分PSI
'''
data = data.sort_values(['apply_id','var_code','created_at'],ascending=False)\
.drop_duplicates(['apply_id','var_code'])
# 将数据进行列行转换
data_pivot_all = data.pivot(index='apply_id',columns='var_code',values='var_val')
# 变量出现空值的apply统计
data_input_vars_missing = data_pivot_all[data_pivot_all[input_vars].isnull().sum(axis=1)>0]
data_scored_applys = data_pivot_all[data_pivot_all[input_vars].isnull().sum(axis=1)==0]
# 进模型前的原始数据
data_scored_applys_origin = data_scored_applys[input_vars]
# 将数据转化为字典中的格式
data_scored_applys_origin = mu.convert_right_data_type(data_scored_applys_origin, var_dict)[0]
try:
# 将需要做dummy的变量进行dummy转化
data_dummys = pd.get_dummies(data_scored_applys_origin[list(var_transform_method['dummy_vars'].keys())]\
,columns=list(var_transform_method['dummy_vars'].keys()), drop_first=False\
, prefix_sep='DUMMY')
# 进入模型的数据
data_in_model = pd.merge(data_scored_applys_origin,data_dummys,left_index=True,right_index=True)
except:
data_in_model = data_scored_applys_origin
data_in_model.rename(columns=var_transform_method['dummy_var_name_map'],inplace=True)
# 转换成xgb格式
data_in_model_DMatrix = xgb.DMatrix(data_in_model[model_booster.__dict__['feature_names']])
data_scored_applys['offLine_prob'] = model_booster.predict(data_in_model_DMatrix)
data_scored_applys['offLineScore'] = data_scored_applys['offLine_prob']\
.apply(lambda x : mt.Performance().p_to_score(x))
# 打分错误的applyid
data_scored_applys_wrong = data_scored_applys[data_scored_applys[[onLineScoreName,'offLineScore']]\
.apply(lambda x : float(x[onLineScoreName]) != float(x['offLineScore']),axis=1)]
data_scored_applys_right = data_scored_applys[data_scored_applys[[onLineScoreName,'offLineScore']]\
.apply(lambda x : float(x[onLineScoreName]) == float(x['offLineScore']),axis=1)]
# PSI统计
point_bounds_XGBRandom = mt.BinWoe().obtain_boundaries(model_decile['分箱'])['cut_boundaries']
model_decile_curr = pd.cut(data_scored_applys_right[onLineScoreName].astype(float)\
,point_bounds_XGBRandom).value_counts().sort_index().to_frame('curr_num').reset_index()
model_decile_final = pd.concat([model_decile,model_decile_curr],axis=1)
model_decile_final['建模分布'] = model_decile_final['样本数']/model_decile_final['样本数'].sum()
model_decile_final['curr_dist'] = model_decile_final['curr_num']/model_decile_final['curr_num'].sum()
model_decile_final['psi'] = model_decile_final.apply(lambda x : (x['建模分布'] - x['curr_dist'])\
*log(x['建模分布']/x['curr_dist'])\
if x['curr_dist']!=0 and x['建模分布']!=0 else 0\
,axis=1)
model_decile_summary = model_decile_final[['分箱','样本数','建模分布','curr_num','curr_dist','psi']]
return data_input_vars_missing,data_scored_applys_wrong,model_decile_summary
def verify_var_and_score_validity(data_origin,score_card_deploy,rebin_spec_bin_adjusted_deploy,model_decile_deploy):
'''
该函数为上线以后统计是否存在缺失值未填充、打分错误以及PSI相关函数
Args:
data_origin(DataFrame):其中表头必须含有apply_id,var_code,create_at字段,
大家严格按照部署监控时刻的要求撰写PSI监控时刻的SQL取数则不会出错，如果唯一标识不是apply_id，务必将唯一标识字段名修改为apply_id
score_card_deploy(DataFrame):切记这是部署时刻的评分卡
rebin_spec_bin_adjusted_deploy(DataFrame)：部署时刻的变量分箱.json文件
model_decile_deploy(DataFrame):部署时刻的model decile就在部署的评分卡中
Returns：
wrong_data(DataFrame):未填充缺失值的所有apply
wrong_score_vars(dict):变量以及其对应的打分错误明细
wrong_model_score(DataFrame):模型分打分错误明细
var_dist_data_with_score_card(DataFrame):变量PSI
score_dist_with_decile(DataFrame):模型分PSI
'''
# 将部署的评分卡切换成和建模时对应的字段名
score_card_deploy.rename(columns={'打分':'变量打分','中间层指标名称':'指标英文'},inplace=True)
# 选出模型中用到的字段名和其对应的
model_selected = [i for i in set(list(score_card_deploy['指标英文'])) if str(i)!='nan']
mlr_selected_vars = [i for i in set(list(score_card_deploy['输出打分指标名称'])) if str(i)!='nan']
# 生成数据字典
var_dict = score_card_deploy.drop_duplicates('指标英文')
var_dict = var_dict[var_dict['指标英文'].isin(model_selected)]
# 生成打分时候建模的评分卡
score_card_modeling = score_card_deploy[score_card_deploy['指标英文'].isin(model_selected)]
score_card_modeling.ix[len(score_card_modeling)+1,'指标英文'] = 'intercept'
const_var = [i for i in set(list(score_card_deploy['输出打分指标名称'])) if 'const' in i][0]
const_value = float(score_card_deploy.ix[score_card_deploy['输出打分指标名称']==const_var,'变量打分'])
score_card_modeling.ix[score_card_modeling['指标英文']=='intercept','变量打分'] = const_value
# 生成建模时刻的rebin_spec
rebin_spec_bin_adjusted_modeling = rebin_spec_bin_adjusted_deploy['numerical']
rebin_spec_bin_adjusted_modeling.update(rebin_spec_bin_adjusted_deploy['categorical'])
# 生成变量名称与打分名称对应关系
modelVar_scoreVar_dict = {}
for j,i in score_card_deploy[['指标英文','输出打分指标名称']].drop_duplicates(['指标英文']).iterrows():
if str(i['指标英文'])!='nan':
modelVar_scoreVar_dict[i['指标英文']] = i['输出打分指标名称']
# 转换原始数据格式
try:
data_origin = data_origin.sort_values(['apply_id','var_code','created_at'],ascending=False)\
.drop_duplicates(['apply_id','var_code','created_at'])
except:
try:
data_origin = data_origin.sort_values(['apply_id','var_code'],ascending=False)\
.drop_duplicates(['apply_id','var_code'])
except:
pass
data_origin_pivot = data_origin.pivot(index='apply_id',columns='var_code',values='var_val')
# 找出变量缺失的用户
wrong_data = data_origin_pivot[data_origin_pivot.isnull().sum(axis=1)>0]
wrong_data.reset_index(inplace=True)
# 找出不缺失打分的用户
right_data = data_origin_pivot[data_origin_pivot.isnull().sum(axis=1)==0]
right_data_converted = convert_right_data_type(right_data[model_selected],var_dict)[0]
# 将数据转换为bin
bin_obj = mt.BinWoe()
data_origin_pivot_cat = bin_obj.convert_to_category(right_data_converted[model_selected], var_dict\
, rebin_spec_bin_adjusted_modeling)
data_origin_pivot_score_all = mt.Performance().calculate_score_by_scrd(data_origin_pivot_cat[model_selected]\
,score_card_modeling)
data_origin_pivot_score_vars = data_origin_pivot_score_all[0]
data_origin_pivot_score_model = data_origin_pivot_score_all[1]
data_origin_pivot_cat.columns = [i+'_cat' for i in data_origin_pivot_cat.columns]
data_origin_pivot_score_vars.columns = [i+'_varScoreBymodel' for i in data_origin_pivot_score_vars.columns]
data_origin_pivot_all = pd.merge(pd.merge(data_origin_pivot,data_origin_pivot_cat,left_index=True,right_index=True)\
,data_origin_pivot_score_vars,left_index=True,right_index=True)
# 将打分错误的变量对应的申请找出来
wrong_score_vars = {}
for i in model_selected:
wrong_dt =data_origin_pivot_all[data_origin_pivot_all\
.apply(lambda x : float(x[modelVar_scoreVar_dict[i]])!=float(x[i+'_varScoreBymodel']),axis=1)]\
[[i,i+'_cat',i+'_varScoreBymodel',modelVar_scoreVar_dict[i]]]
wrong_score_vars[i] = wrong_dt.reset_index()
# 整合线上和线下打分
mlr_score_vars = [i for i in mlr_selected_vars if 'creditscore' in i][0]
model_on_off_score = pd.merge(data_origin_pivot_score_model.to_frame('back_score'),data_origin_pivot_all[mlr_score_vars]\
.to_frame('mlr_score'),left_index=True,right_index=True)
wrong_model_score = model_on_off_score[model_on_off_score\
.apply(lambda x : float(x['back_score']) != float(x['mlr_score']),axis=1)]
wrong_model_score.reset_index(inplace=True)
# 求变量的PSI
var_dist = []
for i in model_selected:
tmp = (data_origin_pivot_cat[i+'_cat'].value_counts())\
.to_frame('allNum').reset_index()
tmp['dist'] = tmp['allNum']/len(data_origin_pivot_cat)
tmp['指标英文'] = i
tmp.columns = ['分箱','allNum','dist','指标英文']
var_dist.append(tmp)
var_dist_data = pd.concat(var_dist)[['指标英文','分箱','allNum','dist']]
var_dist_data['分箱'] = var_dist_data['分箱'].astype(str)
var_dist_data_with_score_card = pd.merge(score_card_modeling,var_dist_data,on = ['指标英文','分箱'])
var_dist_data_with_score_card['PSI'] = var_dist_data_with_score_card.apply(lambda x : (x['dist'] - x['分布占比'])\
*log(x['dist']/x['分布占比'])\
if x['dist']!=0 and x['分布占比']!=0 else 0\
,axis=1)
var_dist_data_with_score_card = var_dist_data_with_score_card\
[['指标分类','指标英文','变量中文','数据类型','分箱','N','分布占比','allNum','dist','PSI']]
# 求打分的psi
# 拿到打分的cut_bounds
point_bounds = mt.BinWoe().obtain_boundaries(model_decile_deploy[u'分箱'])['cut_boundaries']
mlr_score_dist = (pd.cut(data_origin_pivot_all[mlr_score_vars].astype(float),point_bounds)\
.value_counts().to_frame('allNum')).reset_index()
mlr_score_dist['dist'] = mlr_score_dist['allNum']/len(data_origin_pivot_all)
mlr_score_dist['index'] = mlr_score_dist['index'].astype(str)
model_decile_deploy['样本分布'] = model_decile_deploy['样本数']/sum(model_decile_deploy['样本数'])
score_dist_with_decile = pd.merge(model_decile_deploy,mlr_score_dist,left_on='分箱',right_on='index')\
[['分箱','样本数','样本分布','allNum','dist']]
score_dist_with_decile['PSI'] = score_dist_with_decile.apply(lambda x : (x['dist'] - x['样本分布'])\
*log(x['dist']/x['样本分布'])\
if x['dist']!=0 and x['样本分布']!=0 else 0\
,axis=1)
return wrong_data,wrong_score_vars,wrong_model_score,var_dist_data_with_score_card,score_dist_with_decile
import os
import sys
import pickle
import time
from datetime import datetime
from xgboost import XGBClassifier
from sklearn.model_selection import GridSearchCV
from sklearn.metrics import accuracy_score, roc_curve
import utils3.misc_utils as mu
import utils3.summary_statistics1 as ss
import utils3.feature_selection as fs
fs_obj = fs.FeatureSelection()
import utils3.metrics as mt
pf = mt.Performance()
bw = mt.BinWoe()
import utils3.plot_tools as pt
import matplotlib.pyplot as plt
import utils3.xgboost_model as xm
import utils3.filing as fl
import utils3.data_io_utils as du
## 数据预处理、字典、eda、缺失填充
def data_preprocess(df, in_dict, var_dict=None):
'''
输入原始数据，输出缺失填充好的数据、字典、eda结果
'known_missing': {-999:-9999, -1111:-9999} #将data中已知表示缺失的值赋值为-9999
'''
#index_id=in_dict['index_id']
#label=in_dict['target']
def overall_ranking(self,
X,
y,
var_dict,
args_dict,
methods,
num_max_bins=10,
n_clusters=15,
verbose=True):
"""
综合各算法的综合排序
Args:
X (pd.DataFrame): x 变量宽表, 已经处理过missing value的。如果没有，会处理。
y (pd.Series): y label
var_dict (pd.DataFrame): 变量字典表。必须包含：
[u'数据源', u'指标英文', u'指标中文', u'数据类型', u'指标类型']
args_dict (dict): key 是算法名称如['random_forest', 'svm', 'xgboost', 'IV', 'lasso']
value是dict包含key值grid_search, param.如果没有赋值default值
methods (list): ['random_forest', 'svm', 'xgboost', 'IV', 'lasso']
num_max_bins (int): 用于自动分箱决定分箱的数量, default=10
Returns:
woe_iv_df (pd.DataFrame): 输出的auto classing的WOE IV表，可以直接贴到输出文档里面
result (pd.DataFrame): 每个变量用每个方法计算的metrics和相应的ranking还有综合排序
"""
num_missing = pd.isnull(X).sum().sum()
if num_missing > 0:
X = mu.process_missing(X, var_dict, verbose=verbose)
result_df_list = []
# IV. calculate_iv里面会分箱，所以需要传入的数据是原始的，只经过缺失处理的数据
# 计算IV是mandatory
bin_obj = mt.BinWoe()
logging.info('Overall ranking prep: auto binning started')
X_cat, all_encoding_map, all_spec_dict = bin_obj.binning(
X, y, var_dict, num_max_bins, verbose=verbose)
logging.info('Overall ranking prep: auto binning completed')
woe_iv_df = bin_obj.calculate_woe_all(X_cat,
y,
var_dict,
all_spec_dict,
verbose=verbose)
logging.info('Overall ranking prep: woe calculation completed')
rebin_spec = bin_obj.create_rebin_spec(woe_iv_df, all_spec_dict,
all_encoding_map)
iv_result = woe_iv_df[['指标英文', 'IV']].copy()\
.rename(columns={'指标英文':'var_code'})\
.drop_duplicates().dropna()
iv_result.loc[:, 'iv_rank'] = iv_result.IV.rank(ascending=False)
result_df_list.append(iv_result)
logging.info('Overall ranking prep: IV completed')
# 将categorical变量label encode，numerical保持原样
def _encoding_categorical(data, var_dict):
new_data = data.copy()
if '数据类型' in var_dict.columns.values:
cateogory_col = var_dict.loc[var_dict['指标英文'].isin(new_data.columns) &\
(var_dict['数据类型']=='varchar'), '指标英文'].tolist()
else:
cateogory_col = [
col for col in new_data.columns
if new_data[col].dtype == 'object'
]
for col in cateogory_col:
# NA不fill成missing的话，会一个NA一个label
new_data.loc[:, col] = mu.label_encode(data[col])
return new_data
X = _encoding_categorical(X, var_dict)
if 'random_forest' in methods:
random_forest_result = self.random_forest(X, y, \
args_dict['random_forest'].get('grid_search', False), \
args_dict['random_forest'].get('param', None))
result_df_list.append(random_forest_result)
logging.info('Overall ranking prep: Random Forest completed')
# 太慢了，SVC已经是基于libsvm的，速度没办法更快了
if 'svm' in methods:
svm_result = self.svm(X, y)
result_df_list.append(svm_result)
logging.info('Overall ranking prep: SVM completed')
if 'xgboost' in methods:
xgboost_result = self.xgboost(X, y, \
args_dict['xgboost'].get('grid_search', False), \
args_dict['xgboost'].get('param', None))
result_df_list.append(xgboost_result)
logging.info('Overall ranking prep: Xgboost completed')
if 'lasso' in methods:
lasso_result = self.lasso(X, y)
result_df_list.append(lasso_result)
logging.info('Overall ranking prep: LASSO completed')
result = reduce(lambda left, right: left.merge(right, on='var_code', how='outer'),\
result_df_list)
rank_columns = [i for i in result.columns if 'rank' in i]
result.loc[:, 'overall_rank'] = (result[rank_columns] * 1.0).mean(1)
result = var_dict.loc[:, ['指标英文', '指标中文','数据源']].drop_duplicates()\
.merge(result.rename(columns={'var_code': '指标英文'}), \
on='指标英文')
cluster_result, X_transformed = self.variable_clustering(
X_cat, woe_iv_df, n_clusters=n_clusters)
result = result.merge(cluster_result, on='指标英文', how='left')
return X_cat, X_transformed, woe_iv_df, rebin_spec, result
