Python - TypeError:(函数)正好取2个参数(3给出)-但我只给出2个!

I'm parsing a list of patient visits (csv file). To deal with this, I have a custom set of classes:

我正在解析一个病人访问列表(csv文件)。为了解决这个问题，我有一个定制的类:

class Patient:
    def __init__(self,Rx,ID):
    ....

class PtController:
    def __init__(self,openCSVFile):
        self.dict=DictReader(openCSVFile)
        self.currentPt = ''
        ....

    def initNewPt(self,row):
        Rx = row['Prescription']
        PatientID = row['PatientID']
        self.currentPt = Patient(Rx,PatientID)
        ...

So, I'm using the csv.DictReader to process the file; built into the PtController class. It iterates through, but to set values for the first patient does the following:

我用的是csv。对文件进行处理;内置到PtController类中。它遍历，但为第一个病人设置值如下:

firstRow = self.dict.next()
self.initNewPt(self,firstRow)
    ...

The error:

错误:

TypeError: initNewPt() takes exactly 2 arguments (3 given)

If I print(firstRow) before calling initNewPt, it prints the row in dictionary form as expected.

如果我在调用initNewPt之前打印(firstRow)，它会按照预期的方式打印出字典形式的行。

Using python2.7, and this is my first time working with objects. Thoughts?

使用python2.7，这是我第一次使用对象。想法吗?

3 个解决方案

#1

You do not need to pass self directly as in self.initNewPt(self,firstRow), since it is automatically passed implicitly by Python.

因为它是由Python自动传递的，所以不需要将self直接传递给self。initnewpt (self,firstRow)。

#2

When you call self.initNewPt() you should not pass self as a parameter. This is an implied parameter that's automatically present.

当您调用self。initnewpt()时，您不应该将self作为参数传递。这是一个自动出现的隐含参数。

#3

You need to call the initNewPt without the self argument within a class method:

您需要在类方法中调用initNewPt，而不需要使用self参数:

self.initNewPt(firstRow)

#1