林宏恩python輸入input尋找find沒找到-1

file = open('金融常識.txt','r',encoding='utf-8') lines = file.readlines() file.close() x = input('林宏恩入搜尋關鍵詞: ') for line in lines: if line.find(x) != -1: print(line,end="") file = open('金融常識.txt','r',encoding='utf-8') lines = file.readlines() file.close() x = input('林宏恩輸入搜尋關鍵詞: ') n = 0 for line in lines: if line.find(x) != -1: n=n+1 print(n,' ',line,end='') print(f'總共{n}題') file = open('金融常識.txt','r',encoding='utf-8') lines = file.readlines() file.close() x = input('=林宏恩輸入搜尋關鍵詞: ') n = 0 for line in lines: if x in line: n=n+1 print( n, ' ', line,end='') print(f'總共{n}題') file = open('金融常識.txt','r',encoding='utf-8') reading = file.read() file.seek(0) #回到檔案的開始 lines = file.readlines() file.close() print('read()方法讀共', len(reading), 'readlines()方法讀共', len(lines)) x = input('=林宏恩輸入搜尋關鍵詞: ') n = 0 for line in lines: if x in line: n=n+1 print( n, ' ', line,end='') print(f'總共{n}題')