爲什麼我的if/elif/else不工作？

Question

import CSV 

file_name = input("PLease type in a file name including the extension e.g. .docx or .txt\nelse:") 
start = 0 
error = 0 
with open(file_name, newline='') as csvfile: 
    reader = csv.reader(csvfile, delimiter=' ', quotechar='|') 
    answer = input("Do you want all information to be displayed or only part of it?(A/P)") 
    answer = answer.upper() 
    print(answer) 

    if answer == "A" or "a": 
     All_Info() 
    elif answer == "P" or "p": 
     Part_Info() 
    else: 
     if error < 2: 
      error = error + 1 
      answer = input("Please only type in A or P") 

當我嘗試運行該程序並在鍵入csv文件名後按p鍵時忽略了elif並直接轉到if語句，請幫忙！

Answer 1

它應該是elif answer == "P" or answer == "p"，你需要兩個answer ==的條件。

/E您的第一個if是說(If answer equals "A" is true) or ("a" is true)和「a」的計算結果爲真實的，因爲它是非零的，所以它使用的是第一if聲明，即使你打「P」