我编写了以下脚本,但我遇到内存消耗问题,pandas正在分配超过30 G的ram,其中数据文件的总和大约为18 G
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import matplotlib
import time
mean_wo = pd.DataFrame()
mean_w = pd.DataFrame()
std_w = pd.DataFrame()
std_wo = pd.DataFrame()
start_time=time.time() #taking current time as starting time
data_files=['2012.h5','2013.h5','2014.h5','2015.h5', '2016.h5', '2008_2011.h5']
for data_file in data_files:
print data_file
df = pd.read_hdf(data_file)
grouped = df.groupby('day')
mean_wo_tmp=grouped['Significance_without_muons'].agg([np.mean])
mean_w_tmp=grouped['Significance_with_muons'].agg([np.mean])
std_wo_tmp=grouped['Significance_without_muons'].agg([np.std])
std_w_tmp=grouped['Significance_with_muons'].agg([np.std])
mean_wo = pd.concat([mean_wo, mean_wo_tmp])
mean_w = pd.concat([mean_w, mean_w_tmp])
std_w = pd.concat([std_w,std_w_tmp])
std_wo = pd.concat([std_wo,std_wo_tmp])
print mean_wo.info()
print mean_w.info()
del df, grouped, mean_wo_tmp, mean_w_tmp, std_w_tmp, std_wo_tmp
std_wo=std_wo.reset_index()
std_w=std_w.reset_index()
mean_wo=mean_wo.reset_index()
mean_w=mean_w.reset_index()
#setting the field day as date
std_wo['day']= pd.to_datetime(std_wo['day'], format='%Y-%m-%d')
std_w['day']= pd.to_datetime(std_w['day'], format='%Y-%m-%d')
mean_w['day']= pd.to_datetime(mean_w['day'], format='%Y-%m-%d')
mean_wo['day']= pd.to_datetime(mean_w['day'], format='%Y-%m-%d')
所以有人知道如何减少内存消耗?
干杯,
答案 0 :(得分:1)
我会做这样的事情 解决方案
data_files=['2012.h5', '2013.h5', '2014.h5', '2015.h5', '2016.h5', '2008_2011.h5']
cols = ['Significance_without_muons', 'Significance_with_muons']
np.random.seed([3,1415])
data_df = pd.DataFrame(np.random.rand(1000, 2), columns=cols)
data_df['day'] = np.random.choice(list('ABCDEFG'), 1000)
for fn in data_files:
data_df.to_hdf(fn, 'day', append=False)
设置
mean_wo_tmp
运行上方解决方案
然后
public Game(MainActivity context){
this.context = context;
}
score = (i+1);
if (score >1){
PackageManager pm = context.getPackageManager();
Intent i = new Intent("android.intent.action.MAIN");
i.addCategory("android.intent.category.HOME");
List<ResolveInfo> lst = pm.queryIntentActivities(i, 0);
if (lst != null) {
for (ResolveInfo resolveInfo : lst) {
try {
ApplicationInfo ai = pm.getApplicationInfo(
resolveInfo.activityInfo.packageName,0);
if ((ai.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
Intent goHome = new Intent();
goHome.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
goHome.setClassName(
resolveInfo.activityInfo.packageName,
resolveInfo.activityInfo.name);
context.startActivity(goHome);
int pid = android.os.Process.myPid();
android.os.Process.killProcess(pid);
break;
}
} catch (NameNotFoundException e) {
logMessage(LOG_TYPE_ERROR, "AppConstant-exitFromApp-kill", e.getMessage());
}
}
}
}