这应该使您入门不错：
infile = r"D:documents and SettingsxxxxDesktoptest_log.txt"important = []keep_phrases = ["test", "important", "keep me"]with open(infile) as f: f = f.readlines()for line in f: for phrase in keep_phrases: if phrase in line: important.append(line) breakprint(important)
它绝不是完美的，例如，没有异常处理或模式匹配，但是您可以很容易地将它们添加到其中。查看正则表达式，这可能比词组匹配更好。如果文件很大，请逐行读取它，以避免出现MemoryError。
输入文件：
This line is super important!don't need this one...keep me!bla blanot botheredALWAYS include this test line
输出：
['This line is super important!n', 'keep me!n', 'ALWAYS include this test line']
注意：这是Python 3.3。
