爲什麼當我的班級打電話給我的班級工作時，需要兩個參數？

-2

下運行的Python 3.3.4是我的課代碼 -

class Curl(): 

    def __init__(self): 
     self.file7 = file7 
     self.Days1 = Days1 

    def readfile(self): 
     ticknum = 0 
     read_ticker = [] 
     ins = open(file7, "r") 
     for line in ins: 
      if line.endswith('\n'): 
       line=line[:-1] 
      read_ticker.append(line) 
      ticknum =+1 
     ins.close() 
     return read_ticker 

    def CalcDates(self, Days1): # Determine dates 
     calculated_dates = dict() 
     Run_Time = (time.strftime("%H/%M/%S")) 
     calculated_dates['Run_Time']= Run_Time 
     Today = date.today() 
     calculated_dates['Today'] = Today 
     End_Date = (Today - timedelta(days=Days1)) 
     calculated_dates ['Start_Date'] = Today 
     Start_Day = str(Today.strftime("%d")) 
     calculated_dates['Start_Day'] = Start_Day 
     Start_Month = str(Today.strftime("%m")) 
     calculated_dates['Start_Month'] = Start_Month 
     Start_Year = str(Today.strftime("%Y")) 
     calculated_dates['Start_Year']= Start_Year 
     End_Day = str(End_Date.strftime("%d")) 
     calculated_dates['End_Day'] = End_Day 
     End_Month = str(End_Date.strftime("%m")) 
     calculated_dates['End_Month']= End_Month 
     End_Year = str(End_Date.strftime("%Y")) 
     calculated_dates['End_Year']= End_Year 
     return calculated_dates

它運行，如果我做了以下內容：

file7 = 'C:\\...\\file1.txt' 
fileList = Curl.readfile(file7) 
print('readTickers is complete') 
print(fileList) 
D1 = Curl.CalcDates(90, 90) 
print(D1)

我希望它運行，如果我改變行D1如下; D1 = Curl.CalcDates（90）

但它沒有 - 我得到以下錯誤;

Traceback (most recent call last): 
File "C:\Users\Edge\Desktop\readTICKR class432.py", line 56, in <module> 
D1 = Curl.CalcDates(90) 
TypeError: CalcDates() missing 1 required positional argument: 'Days1'

爲什麼當我打電話給Curl.CalcDates時需要雙重爭論？
我該如何解決這個問題，以便我可以使用一個單獨的論證？

來源

2016-02-21 Edge Snyder

原因CalcDates是一種實例方法，因此您需要先創建一個Curl對象。

D1 = Curl(file7, Days1).CalcDates(90)

此外，您還需要修復您的__init__函數。

def __init__(self, file7, Days1): 
    self.file7 = file7 
    self.Days1 = Days1

來源

2016-02-21 20:23:40 styvane

爲什麼當我的班級打電話給我的班級工作時，需要兩個參數？

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