輸入格式如下，以csv儲存：
sku_id
長s寬s
高s重量
箱子長s
箱子寬s
箱子高s
2195809
27058
34130
1400
1200
1810
python**如下：
# -*- coding: utf-8 -*-
"""created on wed dec 20 17:19:04 2017
@author: zhangchaoyu
"""import re
import copy
import os
def num_f(f):
flines = -1
for i in f:
flines = flines + 1
return flines
def read_csv(f,num_f):
data =
#標題不讀
f.readline()
for i in range(num_f):
row = f.readline()
row = re.split(',', row)
for k in range(1,len(row)):
row[k] = int(float(row[k]))
return data
def isnan(num):
return num != num
#二維裝箱
def sub_boxpacking(cl,cw,ch,l,w,h):
#簡單碼放模式作為下界
n1 = (cl//l)*(cw//w) + (cl%l//w)*(cw//l)
n2 = (cw//l)*(cl//w) + (cw%l//w)*(cl//l)
n = max(n1,n2)
if(cl*cw/l/w >= n+1 and cw > l+w):
up1 = int(cl//l)
up2 = int(cl//w)
up3 = int(cw//l)
up4 = int(cw//w)
for x1 in range(1,up1+1):
x2 = (cl-x1*l)//w
for y1 in range(1,up4+1):
y4 = (cw-y1*w)//l
for y2 in range(1,up3+1):
y3 = (cw-y2*l)//w
for x3 in range(1,up1+1):
x4 = (cl-x3*l)//w
if (y1*w <= y2*l and x2*w <= x3*l and y3*w <= y4*l and x4*w <= x1*l):
if((y1+y3)*w>cw or (x2+x4)*w>cl):
continue
n3 = x1*y1+x2*y2+x3*y3+x4*y4
#if(n3>n):
#print([x1,y1,x2,y2,x3,y3,x4,y4])
n = max(n3,n)
if (y1*w >= y2*l and x2*w >= x3*l and y3*w >= y4*l and x4*w >= x1*l):
if((x1+x3)*l>cl or (y2+y4)*l>cw):
continue
n3 = x1*y1+x2*y2+x3*y3+x4*y4
#if(n3>n):
#print([x1,y1,x2,y2,x3,y3,x4,y4])
n = max(n3,n)
return n
def boxpacking(data):
#碼盤件數、#碼垛層數、每層件數、利用率
num =
num_levels =
num_eachlevel =
fl =
flag = 1;
for sku in data:
print("正在計算第",flag,"個，總共",len(data),"個，佔比",flag*10000//len(data)/100,"%")
flag += 1
e1,e2,e3 = sku[1],sku[2],sku[3]
if e1<=10 or e2<=10 or e3<=10 or isnan(e1) or isnan(e2) or isnan(e3):
continue
cl = sku[5]
cw = sku[6]
ch = sku[7]
n1 = sub_boxpacking(cl,cw,ch,e1,e2,e3)
n2 = sub_boxpacking(cl,cw,ch,e2,e3,e1)
n3 = sub_boxpacking(cl,cw,ch,e3,e1,e2)
n_el = n1
n_l = ch//e3
if(n_el*n_ln_el = n2
n_l = ch//e1
if(n_el*n_ln_el = n3
n_l = ch//e2
if n_l == 0:
else:
return [num,num_levels,num_eachlevel,fl]
def output(data,result):
output = copy.deepcopy(data)
for i in range(len(output)):
output[i] += [result[0][i],result[1][i],result[2][i],result[3][i]]
if os.path.exists("碼盤結果彙總.csv"):
os.remove("碼盤結果彙總.csv")
f1 = open("碼盤結果彙總.csv","a")
f1.write('sku_id,長s,寬s,高s,重量,箱子長s,箱子寬s,箱子高s,碼盤件數,碼垛層數,每層件數,體積利用率\n')
for i in range(len(output)):
for j in range(len(output[i])):
f1.write(str(output[i][j]))
f1.write(',')
f1.write('\n')
f1.close()
if __name__ == '__main__':
print("檔案錄入")
num_f = num_f(open(r'輸入格式.csv'))
data = read_csv(open(r'輸入格式.csv'),num_f)
print("檔案錄入完成，開始計算")
result = boxpacking(data)
print("計算完成，輸出檔案")
output(data,result)
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