英文:
Beginner error: TypeError: Molecularbiology.__init__() takes 5 positional arguments but 6 were given
问题
我正在学习Python，处于基础水平。我试图创建新的子类，并覆盖__init__方法，但在继承父类时出现了位置错误。你能帮助我理解这个问题吗？我尝试修复缩进并进行一些尝试。
我收到以下错误信息：
TypeError: Molecularbiology.__init__()接受5个位置参数，但提供了6个
class Employee:
raise_amount = 1.08
def __init__(self, first, last, pay, prog_lang):
self.first = first
self.last = last
self.pay = pay
self.email = first + '.' + last + '@gmail.com'
class Developer(Employee):
def __init__(self, first, last, pay, prog_lang): # 继承
super().__init__(first, last, pay)
self.prog_lang = prog_lang
class Molecularbiology(Employee):
def __init__(self, first, last, pay, mol_bio): # 继承
super().__init__(first, last, pay)
self.mol_bio = mol_bio
dev_1 = Molecularbiology('Kubri', 'Lyreco', 100000, 'RNASeq')
dev_2 = Molecularbiology('Vikki', 'Suomalainen', 50000, 'Microscopy')
print(dev_1.email)
print(dev_1.mol_bio)
我想在继承父类的参数的同时包括子类。
英文:
I'm learning Python and at the basic level. I'm trying to create new subclasses with __init__ override but it gives me positional errors when inheriting from the parent class. Can you please help me in understanding this. I tried fixing my indentation and playing around.
I get the following error:
TypeError: Molecularbiology.__init__() takes 5 positional arguments but 6 were given
class Employee:
raise_amount = 1.08
def __init__(self, first, last, pay, prog_lang):
self.first = first
self.last = last
self.pay = pay
self.email = first + '.' + last + '@gmail.com'
class Developer(Employee):
def __init__(self, first, last, pay, prog_lang): #inheritance
super().__init__(first, last, pay)
self.prog_lang = prog_lang
class Molecularbiology(Employee):
def __init__(self, first, last, pay, mol_bio): #inheritance
super().__init__(first, last, pay, prog_lang)
self.mol_bio = mol_bio
dev_1 = Molecularbiology(' Kubri', 'Lyreco', 100000, 'Python', 'RNASeq')
dev_2 = Molecularbiology('Vikki', 'Suomalainen', 50000, 'Javascript', 'Microscopy')
print(dev_1.email)
print(dev_1.prog_lang)
print(dev_1.mol_bio)
I want to include the subclass while inheriting arguments from the parent class
答案1
得分: 1
变量的命名使人难以理解你想做什么，因此难以给你一个更一般的答案。
回答你的确切问题，Molecularbiology() 需要 4 个显式参数：在实例化类时不应显式传递 self 参数，如果不考虑 self，__init__ 方法有 4 个参数。你需要删除一个实例化参数（不太清楚是哪一个）来修复这个问题。
然后你将会遇到另一个错误，因为这一行 super().__init__(first, last, pay, prog_lang) 意味着 prog_lang 变量在作用域内可用（即它是封装的 __init__ 方法的参数），但实际上它并不是。修复此错误取决于你确切想要做什么。
英文:
The naming of the variables makes hard to understand what you want to do and thus to give you a more general answer.
To answer your exact question, Molecularbiology() requires 4 explicit arguments: the self argument should not be explicitly passed when you instantiate the class, and the __init__ method has 4 arguments if you exclude the self. You need to remove one of the instantiation argument (not very clear which one) to fix this.
You will have another error then, because the line super().__init__(first, last, pay, prog_lang) implies that the prog_lang variable is available in the scope (ie it is an argument of encompassing __init__ method), and it is not. Fixing this error depends on what you want to do exactly.
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