我正在为卷积神经网络(CNN)制作大量图像(蜡烛图与成交量),约1.7百万张。然而,目前的脚本在每次迭代后内存使用量都会增加,每次增加2-5MB,直到无论我运行多少个实例,内存都已满(16GB,脚本最终使用11-12GB)。
我的目标是同时运行多个脚本实例。我尝试了并行处理,但效果不佳。因此,我只是使用了多个内核。我已经尝试了许多减少内存使用的方法,但似乎没有什么作用。
我正在使用Jupyter笔记本(Python 3.8.5)(anaconda)在VS code中,拥有64位Windows系统。16GB RAM和Intel i7第八代处理器。
第一个单元格调用软件包,加载数据并设置参数。
# import required packages
import matplotlib.dates as mpdates
import matplotlib.pyplot as plt
import mplfinance as mpf
import matplotlib as mpl
from PIL import Image
import pandas as pd
import math as math
import numpy as np
import io as io
import gc as gc
import os as os
#set run instance number
run=1
#timeframe
tf = 20
#set_pixels
img_size=56
#colors
col_up = '#00FF00'
col_down = '#FF0000'
col_vol = "#0000FF"
#set directory
direct = "C:/Users/robin/1 - Scriptie/images/"
#loading the data
data1 = pd.read_csv(r'D:\1 - School\Econometrics\2020 - 2021\Scriptie\Explainable AI\Scripts\Data\test_data.csv',header=[0, 1] , index_col = 0 )
data1.index=pd.to_datetime(data1.index)
#subsetting the data
total_symbols = math.floor(len(data1.columns.unique(level=0))/6)
symbols1 = data1.columns.unique(level=0)[(run-1)*total_symbols:run*total_symbols]
#set the plot parameters
mc = mpf.make_marketcolors(up = col_up ,down = col_down, edge='inherit', volume= col_vol, wick='inherit')
s = mpf.make_mpf_style(marketcolors=mc)
第二个单元格定义了用于绘制图表的函数:
# creating candlestick chart with volume
def plot_candle(i,j,data,symbols,s,mc,direct,img_size, tf):
#slicing data into 30 trading day windows
data_temp=data[symbols[j]][i-tf:i]
#creating and saving the candlestick charts
buf = io.BytesIO()
save = dict(fname= buf, rc = (["boxplot.whiskerprops.linewidth",10]),
pad_inches=0,bbox_inches='tight')
mpf.plot(data_temp,savefig=save, type='candle',style=s, volume=True, axisoff=True,figratio=(1,1),closefig=True)
buf.seek(0)
im = Image.open(buf).resize((img_size,img_size))
im.save(direct+"/"+str(symbols[j])+"/"+str(i-tf+1)+".png", "PNG")
buf.close()
plt.close("all")
第三个单元格循环遍历数据并调用第二个单元格中的函数。
#check if images folder excists, if not, create it.
if not os.path.exists(direct):
os.mkdir("C:/Users/robin/1 - Scriptie/images")
for j in range(0,len(symbols1)):
#Check if symbol folder excists, if not, create it
if not os.path.exists(direct+"/"+symbols1[j]):
os.mkdir(direct + "/"+symbols1[j])
for i in range(tf,len(data1)) :
#check if the file has already been created
if not os.path.exists(direct+"/"+str(symbols1[j])+"/" +str(i-tf+1)+".png"):
#call the functions and create the
plot_candle(i , j , data1 , symbols1 ,s ,mc ,direct , img_size, tf)
gc.collect()
matplotilb.use('agg')
?我猜测可能有很多与 GUI 相关的对象挂起在内存中,等待事件循环运行以允许它们被拆除。 - tacaswellmatplotlib.use('agg')
实际上是做什么的?我查看了文档,但是文档非常有限。 - RKoppe