在python中创建对象列表

存储对象实例列表非常简单

class MyClass(object):
    def __init__(self, number):
        self.number = number

my_objects = []

for i in range(100):
    my_objects.append(MyClass(i))

# later

for obj in my_objects:
    print obj.number

python教程讨论 how to use lists .

存储类列表与存储任何其他对象没有区别。

def MyClass(object):
    pass

my_types = [str, int, float, MyClass]

在Python中,类的名称引用类实例。考虑:

class A: pass
class B: pass
class C: pass

lst = [A, B, C]

# instantiate second class
b_instance = lst[1]()
print b_instance

我有一些粗俗的答案,可能很糟糕…但我在这一点上的经验很少。

一种方式:

class myClass():
    myInstances = []
    def __init__(self, myStr01, myStr02):
        self.myStr01 = myStr01
        self.myStr02 = myStr02
        self.__class__.myInstances.append(self)

myObj01 = myClass("Foo", "Bar")
myObj02 = myClass("FooBar",  "Baz")

for thisObj in myClass.myInstances:
    print(thisObj.myStr01)
    print(thisObj.myStr02)

一种实现此目的的黑客方法:

import sys
class myClass():
    def __init__(self, myStr01, myStr02):
        self.myStr01 = myStr01
        self.myStr02 = myStr02

myObj01 = myClass("Foo", "Bar")
myObj02 = myClass("FooBar",  "Baz")

myInstances = []
myLocals = str(locals()).split("'")
thisStep = 0
for thisLocalsLine in myLocals:
    thisStep += 1
    if "myClass object at" in thisLocalsLine:
        print(thisLocalsLine)
        print(myLocals[(thisStep - 2)])
        #myInstances.append(myLocals[(thisStep - 2)])
        print(myInstances)
        myInstances.append(getattr(sys.modules[__name__], myLocals[(thisStep - 2)]))

for thisObj in myInstances:
    print(thisObj.myStr01)
    print(thisObj.myStr02)

另一个更聪明的黑客:

import sys
class myClass():
    def __init__(self, myStr01, myStr02):
        self.myStr01 = myStr01
        self.myStr02 = myStr02

myInstances = []
myClasses = {
    "myObj01": ["Foo", "Bar"],
    "myObj02": ["FooBar",  "Baz"]
    }

for thisClass in myClasses.keys():
    exec("%s = myClass('%s', '%s')" % (thisClass, myClasses[thisClass][0], myClasses[thisClass][1]))
    myInstances.append(getattr(sys.modules[__name__], thisClass))

for thisObj in myInstances:
    print(thisObj.myStr01)
    print(thisObj.myStr02)

如果“我的对象”列表是要在其中存储对象的列表,而“我的对象”是要存储的对象,请使用以下结构:

my_list.append(my_object)

可以使用列表理解在一行中创建对象列表。

class MyClass(object): pass

objs = [MyClass() for i in range(10)]

print(objs)

我认为您在这里要做的是使用一个包含类实例的结构。我不知道在Python中命名结构的语法,但是在Perl中,我可以创建一个结构obj.id[x],其中x是一个递增整数。然后,我可以通过用数字引用这个结构来引用我需要的特定类实例。这是你想做的事情吗?