如何通过python中的属性从对象列表中选择一个对象 [英] how to select an object from a list of objects by its attribute in python

问题描述

很抱歉，如果已经问过这个问题，但我认为我不知道正确的术语来通过Google搜索合适的解决方案.

Apologies if this question has already been asked but I do not think I know the correct terminology to search for an appropriate solution through google.

我想通过对象的属性值从对象列表中选择一个对象，例如:

I would like to select an object from a list of objects by the value of it's attribute, for example:

class Example():
    def __init__(self):
        self.pList = []
    def addPerson(self,name,number):
        self.pList.append(Person(self,name,number))

class Person():
    def __init__(self,name,number):
        self.nom = name
        self.num = number


a = Example()
a.addPerson('dave',123)
a.addPerson('mike',345)

a.pList #.... somehow select dave by giving the value 123

在我的情况下，该号码将始终是唯一的

in my case the number will always be unique

感谢您的帮助

推荐答案

尝试

dave = next(person for person in a.pList if person.num == 123)

或

for person in a.pList:
    if person.num == 123:
        break
else:
    print "Not found."
dave = person

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