import datetime as DTimport calendardef getMonthRanges(startDate, endDate): while startDate <= endDate: year, month = startDate.year, startDate.month weekday, day = calendar.monthrange(year, month) end = min(DT.date(year, month, day), endDate) yield (startDate, end) startDate = end+DT.timedelta(days=1)ranges = [map(str, interval) for interval in getMonthRanges(DT.date(2011,9,11), DT.date(2013,4,24))]print(ranges)產(chǎn)量[['2011-09-11', '2011-09-30'], ['2011-10-01', '2011-10-31'], ['2011-11-01', '2011-11-30'], ['2011-12-01', '2011-12-31'], ['2012-01-01', '2012-01-31'], ['2012-02-01', '2012-02-29'], ['2012-03-01', '2012-03-31'], ['2012-04-01', '2012-04-30'], ['2012-05-01', '2012-05-31'], ['2012-06-01', '2012-06-30'], ['2012-07-01', '2012-07-31'], ['2012-08-01', '2012-08-31'], ['2012-09-01', '2012-09-30'], ['2012-10-01', '2012-10-31'], ['2012-11-01', '2012-11-30'], ['2012-12-01', '2012-12-31'], ['2013-01-01', '2013-01-31'], ['2013-02-01', '2013-02-28'], ['2013-03-01', '2013-03-31'], ['2013-04-01', '2013-04-24']]分享全局變量不會更新，但是我將其導入到正在更新的解釋器中。請幫我如何更新字典 dimport texttableclass Lc: d={50:8,100:6,200:4,500:3,1000:2,2000:1} he=['container_size_in_ltrs','qty'] def inventory(self,g): d1=self.d if d1!=g: d1=g self.d=g l1=d1.keys() l1.sort() li=[] ls=[] for i in l1: li=[] li.append(i) li.append(d1[i]) ls.append(li) table=texttable.Texttable() table.header(self.he) table.add_rows(ls,header=False) print table.draw() def add_inv(self,k,v): d=self.d for i,j in d.items(): if k==i: d[k]=d[k]+v print d return dz=Lc()g=z.add_inv(500,2)print z.d
1 回答
弒天下
TA貢獻1818條經(jīng)驗 獲得超8個贊
您的全局變量正在更新。提取部分代碼：
class Lc:
d={50:8,100:6,200:4,500:3,1000:2,2000:1}
he=['container_size_in_ltrs','qty']
def add_inv(self,k,v):
d=self.d
for i,j in d.items():
if k==i:
d[k]=d[k]+v
print d
return d
z=Lc()
x=Lc()
print "Add 2 to 500, expect 500:5"
g=z.add_inv(500,2)
print z.d
# Notice that x.add_inv also modifies z.d
print "Add 5 to 500, expect 500:7 because x initialized d again"
h=x.add_inv(500,2)
print z.d
我得到：
Add 2 to 500, expect 500:5
{100: 6, 200: 4, 2000: 1, 1000: 2, 50: 8, 500: 5}
{100: 6, 200: 4, 2000: 1, 1000: 2, 50: 8, 500: 5}
Add 5 to 500, expect 500:7 because x initialized d again
{100: 6, 200: 4, 2000: 1, 1000: 2, 50: 8, 500: 7}
{100: 6, 200: 4, 2000: 1, 1000: 2, 50: 8, 500: 7}
我只是希望您確實試圖以d這種卑鄙的方式宣布其為全球性。
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