我试着去ITER在我的字典期运用这样的:字典迭代与ITER FUNC
it = iter(db)
for i in it:
print(i)
但是当我运行该发生的事情是印刷字典作为一个整体而不是上的按键的无限循环字典
我用这个作为输入:
ppl = Course(123, 'Principles of Programming Languages')
os = Course(133, 'Operating Systems')
db = DB()
db.setCourse(ppl, 'SE', 2, 1)
db.setCourse(os, 'SE', 3, 1)
和我的输出是:
{123: ('Principles of Programming Languages', 'SE', 2, 1), 133: ('Operating Systems', 'SE', 3, 1)}
{123: ('Principles of Programming Languages', 'SE', 2, 1), 133: ('Operating Systems', 'SE', 3, 1)}
{123: ('Principles of Programming Languages', 'SE', 2, 1), 133: ('Operating Systems', 'SE', 3, 1)}
在一个永无止境的循环中。 即时通讯很确定我的下一个是搞砸了。
编辑 数据库代码很长,这是它的ITER部分:
class DB()
DataBase = {}
def __iter__(self):
return iter(self.DataBase)
def getCourse(self,cnum):
for i in self.DataBase:
if i == cnum:
return self.DataBase[i]
def getCoursesByDept(self,dept):
for key, value in self.DataBase.items():
if dept in value:
return self.DataBase[key]
def getCoursesByDeptYear(self,dept,year):
for key, value in self.DataBase.items():
if dept in value and year in value:
return self.DataBase[key]
def getCoursesByDeptYearSem(self,dept,year,semester):
for key, value in self.DataBase.items():
if dept in value and year in value and semester in value:
return self.DataBase[key]
def setCourse(self,Course,dept,year,semester):
self.DataBase[Course.cnum] = (Course.name,dept,year,semester)
def removeCourse(self,cnum):
for i in self.DataBase.keys():
if i == cnum:
del self.DataBase[i]
正确的输出是:
Course 123: Principles of Programming Languages
Course 133: Operating Systems
你忘了分享'DB'类的代码。 –
对不起,我无法重现该问题。另外,你不需要单独的'iter' – thefourtheye
预期的结果是什么? – bereal