謝庭宇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('輸入搜尋關鍵詞: ')
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('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('總共{n}題')

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