所以我试图向 The_Term 类添加一个单元，但单元类型（核心和基础）不能在单元列表中重复。在将两个相同类型的单元添加到单元列表后，它仍然将两个单元附加到列表中，而不是拒绝第二个添加。
class The_Unit():
def __init__(self,code,name, unit_type, prereq, maxStuNum, students):
self.code = code
self.name = name
self.unit_type = unit_type
self.prereq = list(prereq)
self.maxStuNum = maxStuNum
self.students = list(students)
class The_Term():
def __init__(self,termcode, startdate, enddate, unitlist):
self.termcode = termcode
self.startdate = startdate
self.enddate = enddate
self.unitlist = list(unitlist)
def __str__(self):
return 'Term Code: ' + self.termcode + \
'\nStart Date: ' + self.startdate + \
'\nEnd Date: ' + self.enddate + \
'\nUnitlist: ' + ','.join((str(x) for x in self.unitlist))
def addunit(self,unit):
for x in self.unitlist:
if x == 'foundation' or 'core':
print("error")
else:
self.unitlist.append(unit.unit_type)
self.unitlist.append(unit.code)
unit1 = The_Unit('FIT9133','programming foundations in python','foundation',
['none'],'3', ['saki','michelle'])
unit2 = The_Unit('FIT5145','Inroduction to Data Science','core',
['FIT9133','MAT9004','FIT9132'],'6', ['saki','michelle','Ruchi'])
unit3 = The_Unit('FIT9132','Introduction to Data Base','foundation',
['none'],'3', ['saki','michelle'])
term2 = The_Term('TP2','03/03','19/04', '' )
term2.addunit(unit1)
term2.addunit(unit3)
term2.addunit(unit2)
print(term2)
error
error
error
error
error
error
Term Code: TP2
Start Date: 03/03
End Date: 19/04
Unitlist: foundation,FIT9133,foundation,FIT9132,core,FIT5145
根据您要添加的内容检查基础或核心是否已在列表中。如果是这样，打印错误，否则追加。
def addunit(self,unit):
if 'foundation' in self.unitlist and unit.unit_type == 'foundation' \
or 'core' in self.unitlist and unit.unit_type == 'core':
print("error")
else:
self.unitlist.append(unit.unit_type)
self.unitlist.append(unit.code)
您不应该将完整的单元添加到该术语的单元列表中吗？
输出：
error
Term Code: TP2
Start Date: 03/03
End Date: 19/04
Unitlist: foundation,FIT9133,core,FIT5145
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