从共享共同元素的文本中读取行？

Question

如果我有一个名为＆＃39; names.txt＆＃39;的文件包含以下内容：

Adam Jones
Mary Smith
Matt Good
Huey Lee
Matt Armstrong

我如何只用马特＆＃39;打印线条？ （不使用行号）？

Answer 1

with open("names.txt", "r") as f:
    for line in f:
        if line.startswith("Matt"):
            print line.strip()

Answer 2

with open("names.txt") as txt:
    [line for line in txt.readlines() if "Matt" in line]

但是这将返回带有Matt的行list

Answer 3

试试这个：

with open("names.txt") as names:
for row in names:
    if row.startswith("Matt"):
        print(row.strip())

Answer 4

使用find：

f=open('file.txt')
for x in f:
    if x.find('Matt')>=0:
        print(x)