Question

我需要用“我搜索

”这个词打印每一行

text = open("example.txt").read()
start = 0
while 1:
    found = text.find("python", start)
    if found == -1:
        break
    for line in found:
        print line
    start = found + 1

但我收到错误：

TypeError: 'int' object is not iterable (12 line)

Answer 1

您无法迭代整数found。相反，迭代文件中的行，并使用if SUBSTRING in STRING语法;

with open('example.txt') as f:
    for line in f:
        if 'python' in line:
            print(line)

Answer 2

found是＆＃34; python＆＃34;的（整数）位置，你不能迭代它。

你可能意味着像

found = text.find("python", start)
while found != -1:
    # Do something with found: 
    # ...
    start = found + 1
    found = text.find("python", start)

但是，由于您明确希望使用包含单词的每一行，因此最好从行开始。使用

for line in open(filename):

或（见phihags回答）

with open(filename) as f:
    for line in f:

比尝试一次处理所有文本更好。

Python需要从文本中打印行

2 个答案: