Kaggle competition: Mercari Price Suggestion Challenge
def browser_mapping(x):
browsers = ['chrome','safari','firefox','internet explorer','edge','opera','coc coc','maxthon','iron']
if x in browsers:
return x.lower()
elif('android' in x)or('samsung' in x)or('mini' in x)or('iphone' in x)or('in-app' in x)or('playstation' in x):
return 'mobile browser'
elif('mozilla' in x)or('chrome' in x)or('blackberry' in x)or('nokia' in x)or('browser' in x)or('amazon' in x):
return 'mobile browser'
elif('lunascape' in x)or('netscape' in x)or('blackberry' in x)or('konqueror' in x)or('puffin' in x)or('amazon' in x):
return 'mobile browser'
elif '(not set)' in x:
return x
else:
return 'others'
def adcontents_mapping(x):
if('google' in x):
return 'google'
elif('placement' in x)|('placememnt' in x):
return 'placement'
elif '(not set)' in x or 'nan' in x:
return x
elif 'ad' in x:
return 'ad'
else:
return 'others'
def source_mapping(x):
if('google' in x):
return 'google'
elif('youtube' in x):
return 'youtube'
elif '(not set)' in x or 'nan' in x:
return x
elif 'yahoo' in x:
return 'yahoo'
elif 'facebook' in x:
return 'facebook'
elif 'reddit' in x:
return 'reddit'
elif 'bing' in x:
return 'bing'
elif 'quora' in x:
return 'quora'
elif 'outlook' in x:
return 'outlook'
elif 'linkedin' in x:
return 'linkedin'
elif 'pinterest' in x:
return 'pinterest'
elif 'ask' in x:
return 'ask'
elif 'siliconvalley' in x:
return 'siliconvalley'
elif 'lunametrics' in x:
return 'lunametrics'
elif 'amazon' in x:
return 'amazon'
elif 'mysearch' in x:
return 'mysearch'
elif 'qiita' in x:
return 'qiita'
elif 'messenger' in x:
return 'messenger'
elif 'twitter' in x:
return 'twitter'
elif 't.co' in x:
return 't.co'
elif 'vk.com' in x:
return 'vk.com'
elif 'search' in x:
return 'search'
elif 'edu' in x:
return 'edu'
elif 'mail' in x:
return 'mail'
elif 'ad' in x:
return 'ad'
elif 'golang' in x:
return 'golang'
elif 'direct' in x:
return 'direct'
elif 'dealspotr' in x:
return 'dealspotr'
elif 'sashihara' in x:
return 'sashihara'
elif 'phandroid' in x:
return 'phandroid'
elif 'baidu' in x:
return 'baidu'
elif 'mdn' in x:
return 'mdn'
elif 'duckduckgo' in x:
return 'duckduckgo'
elif 'seroundtable' in x:
return 'seroundtable'
elif 'metrics' in x:
return 'metrics'
elif 'sogou' in x:
return 'sogou'
elif 'businessinsider' in x:
return 'businessinsider'
elif 'github' in x:
return 'github'
elif 'gophergala' in x:
return 'gophergala'
elif 'yandex' in x:
return 'yandex'
elif 'msn' in x:
return 'msn'
elif 'dfa' in x:
return 'dfa'
elif '(not set)' in x:
return '(not set)'
elif 'feedly' in x:
return 'feedly'
elif 'arstechnica' in x:
return 'arstechnica'
elif 'squishable' in x:
return 'squishable'
elif 'flipboard' in x:
return 'flipboard'
elif 't-online.de' in x:
return 't-online.de'
elif 'sm.cn' in x:
return 'sm.cn'
elif 'wow' in x:
return 'wow'
elif 'baidu' in x:
return 'baidu'
elif 'partners' in x:
return 'partners'
else:
return 'others'
train['device.browser'] = train['device.browser'].map(lambda x:browser_mapping(str(x ).lower())).astype('str')
 train['trafficSource.adContent'] = train['trafficSource.adContent'].map(lambda x:adcontents_mapping(str(x ).lower())).astype('str')
 train['trafficSource.source'] = train['trafficSource.source'].map(lambda x:source_mapping(str(x ).lower())).astype('str')
 test['device.browser'] = test['device.browser'].map(lambda x:browser_mapping(str(x ).lower())).astype('str')
 test['trafficSource.adContent'] = test['trafficSource.adContent'].map(lambda x:adcontents_mapping(str(x ).lower())).astype('str')
 test['trafficSource.source'] = test['trafficSource.source'].map(lambda x:source_mapping(str(x ).lower())).astype('str')
 def process_device(data_df):
print("process device...")
 data_df['source.country'] = data_df['trafficSource.source'] + '_' + data_df['geoNetwork.country']
data_df['campaign.medium'] = data_df['trafficSource.campaign'] + '_' + data_df['trafficSource.medium']
data_df['browser.category'] = data_df['device.browser'] + '_' + data_df['device.deviceCategory']
data_df['browser.os'] = data_df['device.browser'] + '_' + data_df['device.operatingSystem']
return data_df
train = process_device(train)
 test = process_device(test)
 def custom(data):
print('custom.. ')
 data['device_deviceCategory_channelGrouping'] = data['device.deviceCategory'] + "_" + data['channelGrouping']
data['channelGrouping_browser'] = data['device.browser'] + "_" + data['channelGrouping']
data['channelGrouping_OS'] = data['device.operatingSystem'] + "_" + data['channelGrouping']
for i in ['geoNetwork.city', 'geoNetwork.continent', 'geoNetwork.country','geoNetwork.metro', 'geoNetwork.networkDomain', 'geoNetwork.region','geoNetwork.subContinent']:
for j in ['device.browser','device.deviceCategory', 'device.operatingSystem', 'trafficSource.source']:
data[i + "_" + j] = data[i] + "_" + data[j]
data['content.source'] = data['trafficSource.adContent'] + "_" + data['source.country']
data['medium.source'] = data['trafficSource.medium'] + "_" + data['source.country']
return data
train = custom(train)
 test = custom(test )<define_variables>
NUM_BRANDS = 4000
NUM_CATEGORIES = 1000
NAME_MIN_DF = 10
MAX_FEATURES_ITEM_DESCRIPTION = 20000
excluded_features = [
'date', 'fullVisitorId', 'sessionId', 'totals.transactionRevenue',
'visitId', 'visitStartTime'
]
categorical_features = [
_f for _f in train.columns
if(_f not in excluded_features)&(train[_f].dtype == 'object')
 ]<feature_engineering>
def rmsle(y, y0):
assert len(y)== len(y0)
 return np.sqrt(np.mean(np.power(np.log1p(y)-np.log1p(y0), 2)))
 def split_cat(text):
try: return text.split("/")
 except: return("No Label", "No Label", "No Label")
 def handle_missing_inplace(dataset):
dataset['general_cat'].fillna(value='missing', inplace=True)
 dataset['subcat_1'].fillna(value='missing', inplace=True)
 dataset['subcat_2'].fillna(value='missing', inplace=True)
 dataset['brand_name'].fillna(value='missing', inplace=True)
 dataset['item_description'].fillna(value='missing', inplace=True)
 def cutting(dataset):
pop_brand = dataset['brand_name'].value_counts().loc[lambda x: x.index != 'missing'].index[:NUM_BRANDS]
dataset.loc[~dataset['brand_name'].isin(pop_brand), 'brand_name'] = 'missing'
pop_category1 = dataset['general_cat'].value_counts().loc[lambda x: x.index != 'missing'].index[:NUM_CATEGORIES]
pop_category2 = dataset['subcat_1'].value_counts().loc[lambda x: x.index != 'missing'].index[:NUM_CATEGORIES]
pop_category3 = dataset['subcat_2'].value_counts().loc[lambda x: x.index != 'missing'].index[:NUM_CATEGORIES]
dataset.loc[~dataset['general_cat'].isin(pop_category1), 'general_cat'] = 'missing'
dataset.loc[~dataset['subcat_1'].isin(pop_category2), 'subcat_1'] = 'missing'
dataset.loc[~dataset['subcat_2'].isin(pop_category3), 'subcat_2'] = 'missing'
def to_categorical(dataset):
dataset['general_cat'] = dataset['general_cat'].astype('category')
 dataset['subcat_1'] = dataset['subcat_1'].astype('category')
 dataset['subcat_2'] = dataset['subcat_2'].astype('category')
 dataset['item_condition_id'] = dataset['item_condition_id'].astype('category')
for f in categorical_features:
train[f], indexer = pd.factorize(train[f])
 test[f] = indexer.get_indexer(test[f] )<init_hyperparams>
start_time = time.time()
train = pd.read_table('.. /input/train.tsv', engine='c')
 test = pd.read_table('.. /input/test_stg2.tsv', engine='c' )
params={'learning_rate': 0.03,
'objective':'regression',
'metric':'rmse',
'num_leaves': 31,
'verbose': 1,
"subsample": 0.99,
"colsample_bytree": 0.99,
"random_state":42,
'max_depth': 15,
'lambda_l2': 0.02085548700474218,
'lambda_l1': 0.004107624022751344,
'bagging_fraction': 0.7934712636944741,
'feature_fraction': 0.686612409641711,
'min_child_samples': 21
} 
<train_on_grid>
dftt = train[(train.price < 1.0)]
train = train.drop(train[(train.price < 1.0)].index)
 del dftt['price']
nrow_train = train.shape[0] - dftt.shape[0]
nrow_test = train.shape[0] + dftt.shape[0]
nrow_train = train.shape[0]
y = np.log1p(train["price"])
 merge = pd.concat([train, dftt, test])
 submission = test[['test_id']]
folds = get_folds(df=train, n_splits=5)
 train_features = [_f for _f in train.columns if _f not in excluded_features]
importances = pd.DataFrame()
oof_reg_preds = np.zeros(train.shape[0])
 sub_reg_preds = np.zeros(test.shape[0])
 for fold_,(trn_, val_)in enumerate(folds):
print("Fold:",fold_)
 trn_x, trn_y = train[train_features].iloc[trn_], y_reg.iloc[trn_]
val_x, val_y = train[train_features].iloc[val_], y_reg.iloc[val_]
reg = lgb.LGBMRegressor(**params,
n_estimators=1000 
)
 reg.fit(
 trn_x, np.log1p(trn_y),
eval_set=[(val_x, np.log1p(val_y)) ],
early_stopping_rounds=50,
verbose=100,
eval_metric='rmse' 
)
 imp_df = pd.DataFrame()
imp_df['feature'] = train_features
imp_df['gain'] = reg.booster_.feature_importance(importance_type='gain')
 imp_df['fold'] = fold_ + 1
importances = pd.concat([importances, imp_df], axis=0, sort=False)
 oof_reg_preds[val_] = reg.predict(val_x, num_iteration=reg.best_iteration_)
 oof_reg_preds[oof_reg_preds < 0] = 0
_preds = reg.predict(test[train_features], num_iteration=reg.best_iteration_)
 _preds[_preds < 0] = 0
sub_reg_preds += np.expm1(_preds)/ len(folds)
 mean_squared_error(np.log1p(y_reg), oof_reg_preds)**.5<prepare_output>
merge['general_cat'], merge['subcat_1'], merge['subcat_2'] = zip(*merge['category_name'].apply(lambda x: split_cat(x)))
 merge.drop('category_name', axis=1, inplace=True )
train['predictions'] = np.expm1(oof_reg_preds)
 test['predictions'] = sub_reg_preds<groupby>
numbersList = [1, 2, 3]
strList = ['one', 'two']
numbersTuple =('ONE', 'TWO', 'THREE', 'FOUR')
 result = zip(numbersList, numbersTuple)
 resultSet = set(result)
 print(resultSet)
 result = zip(numbersList, strList, numbersTuple)
 resultSet = set(result)
 print(resultSet )
trn_data = train[train_features + ['fullVisitorId']].groupby('fullVisitorId' ).mean()<groupby>
to_categorical(merge )
%%time
trn_pred_list = train[['fullVisitorId', 'predictions']].groupby('fullVisitorId')\ 
.apply(lambda df: list(df.predictions)) \ 
.apply(lambda x: {'pred_'+str(i): pred for i, pred in enumerate(x)} )<prepare_output>
cv = CountVectorizer(min_df=NAME_MIN_DF,ngram_range=(1, 2),
stop_words='english')
 X_name = cv.fit_transform(merge['name'] )
trn_all_predictions = pd.DataFrame(list(trn_pred_list.values), index=trn_data.index)
 trn_feats = trn_all_predictions.columns
trn_all_predictions['t_mean'] = np.log1p(trn_all_predictions[trn_feats].mean(axis=1))
trn_all_predictions['t_median'] = np.log1p(trn_all_predictions[trn_feats].median(axis=1))
trn_all_predictions['t_sum_log'] = np.log1p(trn_all_predictions[trn_feats] ).sum(axis=1)
 trn_all_predictions['t_sum_act'] = np.log1p(trn_all_predictions[trn_feats].fillna(0 ).sum(axis=1))
trn_all_predictions['t_nb_sess'] = trn_all_predictions[trn_feats].isnull().sum(axis=1)
 full_data = pd.concat([trn_data, trn_all_predictions], axis=1)
 del trn_data, trn_all_predictions
gc.collect()
full_data.shape
full_data.to_csv('full_data.csv', index=False )<groupby>
del train
del test
gc.collect()
cv = CountVectorizer()
X_category1 = cv.fit_transform(merge['general_cat'])
 X_category2 = cv.fit_transform(merge['subcat_1'])
 X_category3 = cv.fit_transform(merge['subcat_2'] )
%%time
sub_pred_list = test[['fullVisitorId', 'predictions']].groupby('fullVisitorId')\ 
.apply(lambda df: list(df.predictions)) \ 
.apply(lambda x: {'pred_'+str(i): pred for i, pred in enumerate(x)} )<prepare_output>
gc.collect()
tv = TfidfVectorizer(max_features=MAX_FEATURES_ITEM_DESCRIPTION,
ngram_range=(1, 3),
stop_words='english')
 X_description = tv.fit_transform(merge['item_description'] )
sub_data = test[train_features + ['fullVisitorId']].groupby('fullVisitorId' ).mean()
sub_all_predictions = pd.DataFrame(list(sub_pred_list.values), index=sub_data.index)
 for f in trn_feats:
if f not in sub_all_predictions.columns:
sub_all_predictions[f] = np.nan
sub_all_predictions['t_mean'] = np.log1p(sub_all_predictions[trn_feats].mean(axis=1))
sub_all_predictions['t_median'] = np.log1p(sub_all_predictions[trn_feats].median(axis=1))
sub_all_predictions['t_sum_log'] = np.log1p(sub_all_predictions[trn_feats] ).sum(axis=1)
 sub_all_predictions['t_sum_act'] = np.log1p(sub_all_predictions[trn_feats].fillna(0 ).sum(axis=1))
sub_all_predictions['t_nb_sess'] = sub_all_predictions[trn_feats].isnull().sum(axis=1)
 sub_full_data = pd.concat([sub_data, sub_all_predictions], axis=1)
 del sub_data, sub_all_predictions
gc.collect()
sub_full_data.shape
sub_full_data.to_csv('sub_full_data.csv', index = False )<groupby>
gc.collect()
train['target'] = y_reg
trn_user_target = train[['fullVisitorId', 'target']].groupby('fullVisitorId' ).sum()<init_hyperparams>
X_dummies = csr_matrix(pd.get_dummies(merge[['item_condition_id', 'shipping']],
sparse=True ).values )
params={'learning_rate': 0.03,
'objective':'regression',
'metric':'rmse',
'num_leaves': 31,
'verbose': 1,
"subsample": 0.99,
"colsample_bytree": 0.99,
"random_state":42,
'max_depth': 15,
'lambda_l2': 0.02085548700474218,
'lambda_l1': 0.004107624022751344,
'bagging_fraction': 0.7934712636944741,
'feature_fraction': 0.686612409641711,
'min_child_samples': 21
}
xgb_params = {
'objective': 'reg:linear',
'booster': 'gbtree',
'learning_rate': 0.02,
'max_depth': 22,
'min_child_weight': 57,
'gamma' : 1.45,
'alpha': 0.0,
'lambda': 0.0,
'subsample': 0.67,
'colsample_bytree': 0.054,
'colsample_bylevel': 0.50,
'n_jobs': -1,
'random_state': 456
} 
<prepare_x_and_y>
lb = LabelBinarizer(sparse_output=True)
 X_brand = lb.fit_transform(merge['brand_name'])
 sparse_merge = hstack(( X_dummies, X_description, X_brand, X_category1, X_category2, X_category3, X_name)).tocsr()
X = sparse_merge[:nrow_train]
X_test = sparse_merge[nrow_test:]
folds = get_folds(df=full_data[['totals.pageviews']].reset_index() , n_splits=5)
 oof_preds = np.zeros(full_data.shape[0])
 oof_preds1 = np.zeros(full_data.shape[0])
 both_oof = np.zeros(full_data.shape[0])
 sub_preds = np.zeros(sub_full_data.shape[0])
 vis_importances = pd.DataFrame()
for fold_,(trn_, val_)in enumerate(folds):
trn_x, trn_y = full_data.iloc[trn_], trn_user_target['target'].iloc[trn_]
val_x, val_y = full_data.iloc[val_], trn_user_target['target'].iloc[val_]
xg = XGBRegressor(**xgb_params, n_estimators=1000)
 reg = lgb.LGBMRegressor(**params,
n_estimators=1500, 
)
 print('XGB' + "-" * 50)
 xg.fit(
 trn_x, np.log1p(trn_y),
eval_set=[(trn_x, np.log1p(trn_y)) ,(val_x, np.log1p(val_y)) ],
early_stopping_rounds=50,
eval_metric='rmse',
verbose=100 
)
 print('LGB' + "-" * 50)
 reg.fit(
 trn_x, np.log1p(trn_y),
eval_set=[(trn_x, np.log1p(trn_y)) ,(val_x, np.log1p(val_y)) ],
eval_names=['TRAIN', 'VALID'],
early_stopping_rounds=50,
eval_metric='rmse',
verbose=100 
)
 imp_df = pd.DataFrame()
imp_df['feature'] = trn_x.columns
imp_df['gain'] = reg.booster_.feature_importance(importance_type='gain')
 imp_df['fold'] = fold_ + 1
vis_importances = pd.concat([vis_importances, imp_df], axis=0, sort=False)
 oof_preds[val_] = reg.predict(val_x, num_iteration=reg.best_iteration_)
 oof_preds1[val_] = xg.predict(val_x)
 oof_preds[oof_preds < 0] = 0
oof_preds1[oof_preds1 < 0] = 0
both_oof[val_] = oof_preds[val_] * 0.6 + oof_preds1[val_] * 0.4
_preds = reg.predict(sub_full_data[full_data.columns], num_iteration=reg.best_iteration_)
 _preds[_preds < 0] = 0
pre = xg.predict(sub_full_data[full_data.columns])
 pre[pre<0]=0
sub_preds +=(_preds / len(folds)) * 0.6 +(pre / len(folds)) * 0.4
print("LGB ", mean_squared_error(np.log1p(trn_user_target['target']), oof_preds)**.5)
 print("XGB ", mean_squared_error(np.log1p(trn_user_target['target']), oof_preds1)**.5)
 print("Combine ", mean_squared_error(np.log1p(trn_user_target['target']), both_oof)**.5 )<save_to_csv>
gc.collect()
print(sparse_merge[1:10,:].todense() )
sub_full_data['PredictedLogRevenue'] = sub_preds
sub_full_data[['PredictedLogRevenue']].to_csv('LGB_XGB.csv', index=True )<set_options>
model = Ridge(alpha=.5, copy_X=True, fit_intercept=True, max_iter=100,
normalize=False, random_state=101, solver='auto', tol=0.01)
 model.fit(X, y )
warnings.simplefilter('error', SettingWithCopyWarning)
 gc.enable()
%matplotlib inline<load_from_csv>
predsR = model.predict(X=X_test )
train = pd.read_csv('.. /input/create-extracted-json-fields-dataset/extracted_fields_train.gz',
dtype={'date': str, 'fullVisitorId': str, 'sessionId':str}, nrows=None)
 test = pd.read_csv('.. /input/create-extracted-json-fields-dataset/extracted_fields_test.gz',
dtype={'date': str, 'fullVisitorId': str, 'sessionId':str}, nrows=None)
 train.shape, test.shape<prepare_x_and_y>
y_reg = train['totals.transactionRevenue'].fillna(0)
 del train['totals.transactionRevenue']
if 'totals.transactionRevenue' in test.columns:
del test['totals.transactionRevenue']<feature_engineering>
submission['price'] = np.expm1(predsR)
 submission.to_csv("submission_Ridge20000.csv", index=False )