全局函數未定義

Question

我在定義我的模塊時遇到了此錯誤。我正嘗試通過動態編程方法編寫一個編輯距離問題的程序。

這裏就是我堅持的模塊：

def cost(i,j,M,w,text,pattern,compare): #Defining the cost functions or can say recurrence formula 
    M[0,j]=0 
    text1=list(text) 
    pattern1=list(pattern) 

    for i in range(1,m+1): 
     for j in range(1,n+1): 
      insertions = M[i-1,j]+1 
      deletions = M[i,j-1]+1 
      matches=M[i-1,j-1] 


    if text1[i]==patttern1[j]: 
     matches = matches+1 
     return matches 
    else : 
     return matches 

和錯誤是：

Traceback (most recent call last): File "/Users/sayaneshome/Documents/plschk.py", line 202, in fill(M, w, text, max) #Filling matrix M with scores File "/Users/sayaneshome/Documents/plschk.py", line 117, in fill c = cost(i,j,M,w,text,pattern,compare) File "/Users/sayaneshome/Documents/plschk.py", line 95, in cost if text1[i]==patttern1[j]: NameError: global name 'patttern1' is not defined

Answer 1

你patttern1有三個t的。刪除一個即可獲得pattern1。