如何对同一个字符串进行多次迭代分区？

Question

我有一个未知长度的字符串，可以重复感兴趣的模式任意次数。 字符串如下所示：

blahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblah

blahblahblahblahblahblahblahblahblahblah

JOHNNYSMITH has entered the above notes on 12/05/2017 14:18 blahblahblahblahblahblahblahblahblahblahblahblahblahblahblah

blahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblah

JOHNNYSMITH has entered the above notes on 12/05/2017 14:19

SARAHJOHNSON has entered the above notes on 12/05/2017 17:45 blahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblah

SARAHJOHNSON has entered the above notes on 12/05/2017 17:46

我正在尝试将注释、用户名和日期分开，以创建一个外观更好的注释框（带有一些css）。下面是我要分开的用户名

before_keyword, keyword, after_keyword = stringg.partition("has entered the above notes on ")
namedate = before_keyword.split()[-1] + "--" + after_keyword.split()[0] + after_keyword.split()[1]
comment = before_keyword.replace(before_keyword.split()[-1], '').rstrip()
print comment
print namedate

这适用于上面注释中输入的用户名的第一种情况。如何遍历字符串以收集字符串中的所有注释/用户名/日期并分别打印出来。你知道吗

谢谢。你知道吗

编辑：输入假名字而不是用户名2389来显示我的名字是如何出现的。你知道吗

Answer 1

我会用正则表达式来做这个。你知道吗

只需循环遍历每一行（FOREACH），然后测试该行的表达式：

(USERNAME\S*) has entered the above notes on (\d{1,2}/\d{1,2}/\d{4}) (\d{1,2}:\d{1,2})

如果这一行匹配，你有你的3个信息（括号中）：用户名，日期和时间。将前面的行存储在一个数组（缓冲区）中，这样就可以得到文本。你知道吗