在python上打印if else語句

Question

我對else語句有疑問。 如何使代碼打印找不到？ 它保持打印找不到

import os

f = open('D:/Workspace/snacks.txt', "r");
class line:
    for line in f.readlines():
        if line.find('chocolate') != -1:
            print "found ", line
        elif line.find('milkshake') != -1:
            print "found ", line
        else:
            print "not found" 

Answer 1

with open('foo') as f:
    lines = f.readlines()
    for line in lines:
        if 'chocolate' in line.lower():
            print "Found: ", line
        elif 'milkshake' in line.lower():
            print "Found: ", line
        else:
            print "Not Found."

Answer 2

首先，您需要關閉文件，可以與wrapper一起使用，使python為您處理它。 刪除課程行。 其余代碼看起來不錯。

import os

with open('D:/Workspace/snacks.txt', "r") as f:
    for line in f.readlines():
        if line.find('chocolate') != -1 or line.find('milkshake') != -1:
            print "found ", line
        else:
            print "not found"