劉紫淇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('劉紫淇入搜尋關鍵詞: ') 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('劉紫淇輸入搜尋關鍵詞: ') n=int();n=0 for line in lines: if line.find(x) != -1: n=n+1 print(line,end="") print('總共(n)題')

file = open('金融常識.txt','r',encoding='utf-8')
lines = file.readlines()
file.close()
x = input('劉紫淇輸入搜尋關鍵詞: ')
n=int();n=0
for line in lines:
 if x line: 
   n=n+1
   print(line,end="")
   print('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('劉紫淇輸入搜尋關鍵詞: ') n = 0 for line in lines: if x in line: n=n+1 print( n, ' ', line,end='') print(f'總共{n}題')