搜索字符串并查找字符串所在的行号[PYTHON]

如何搜索字符串并找到字符串所在的行号

比如说

>>> findlinenb('example.txt', ['desktop', 'connection', 'processor'])
desktop in 23
connection in 35, 38, 35
processor in 4, 5, 6, 8

我的代码：

def findlinenb (filename, list):
file = open(filename, "r")
content = file.read()
for i in list:
    if content.find(i):
        print (i, "in", content.count('\n') + 1)

非常感谢您的任何想法或建议

---

Peter

Simply

grep-n“your_string”your_file.txt

感谢您的快速回复。

words = ['desktop', 'connection', 'processor']
occurrences = dict((w, []) for w in words)
with open("example.txt") as f:
    for i, line in enumerate(f, 1):
        for w in words:
            if w in line:
                occurrences[w].append(i)
print occurrences.items()