Python說的是，變量沒有賦值時

Question

import random
import time
name=input("Welcome to the game what is your name")
print(("This is a numbers game"),(name),("you will be playing against the computer."))
print("The idea of the game is to get closer to 21 to the computer without going over 21"),
ready="N"
ready=input("Are you ready to play the game yet?").lower
if ready=="yes" or ready=="y":
    score=0
    while (score)<21 and (ready == "Y" or ready == "Yes" or ready =="YES" or ready == "yes" or ready =="y"):
        player1=random.randint(1,21)
        score=(score+player1)
        time.sleep(3)
        print(("you have scored"),(score))
        if score <21:
            ready=input("Do you want to add more to your score?")
if score>21: *THE PROBLEMS ON THIS LINE HERE*
    print("Sorry Over 21 , The Computer Wins!")
else:
    print("ok Well done let us see what the computer can do with their turn")
    computerscore=0
    while(computerscore)<21 and (computerscore)<(score):
        computer=random.randint(1,21)
        computerscore=(computerscore+computer)
        time.sleep(3)
        print(("The computer has scored"),(computerscore))
        if (computerscore)<=21 and (computerscore)>(score):
            print("Sorry the computer wins")
        else:
            print("You win well done")
        break

我收到一個錯誤，提示如果分數> 21：NameError：未定義名稱“分數”

但是我把score = 0定義了，不是嗎？

Answer 1

我猜您輸入的yes正確的值，問題可能出在線路上-

ready=input("Are you ready to play the game yet?").lower

您要在ready中將引用分配給lower函數，而應該調用lower()並在ready分配返回值。 范例-

ready=input("Are you ready to play the game yet?").lower()

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另外，如果您希望代碼正常工作，則當您不輸入ready作為yes ，應在if條件之前將score=0設置為yes if ready=="yes" or ready=="y":

Answer 2

可變score在if塊內聲明。

假設ready與"yes"和"y" ，則行score=0永遠不會達到。

因此， if score>21:會引發錯誤。

在輸入第一個if條件之前，您必須設置一個默認值，例如score = 0 。

此外，您輸入了錯誤：

ready=input("Are you ready to play the game yet?").lower

您應該使用.lower()調用該函數。

Answer 3

您需要使用if score>21:行和隨后的所有內容，以便部分代碼包含在較高的if覆蓋范圍內。

import random
import time
name=input("Wecome to the game what is your name")
print(("This is a numbers game"),(name),("you will be playing against the computer."))
print("The idea of the game is to get closer to 21 to the computer without going over 21"),
ready="N"
ready=input("Are you ready to play the game yet?").lower
if ready=="yes" or ready=="y":
    score=0
    while (score)<21 and (ready == "Y" or ready == "Yes" or ready =="YES" or ready == "yes" or ready =="y"):
        player1=random.randint(1,21)
        score=(score+player1)
        time.sleep(3)
        print(("you have scored"),(score))
        if score <21:
            ready=input("Do you want to add more to your score?")
    if score>21: *THE PROBLEMS ON THIS LINE HERE*
        print("Sorry Over 21 , The Computer Wins!")
    else:
        print("ok Well done let us see what the computer can do with their turn")
        #same with the rest

Answer 4

另外，此腳本可能有缺陷，因為有人輸入不同內容的可能性很大。 您可能要包括在該行中：

ready=input("Are you ready to play the game yet? Type 'Y' for Yes").lower()

有關您希望播放器專門放置的內容的更多文字。

但是，如上所述，要點是lower() ，這會導致錯誤。