我有一个数组$text:
Array
(
[0] => "(This is so cool!)"
[1] => "look at @[48382669205:275:JAY Z] and @[28940545600:27:Beyonc\303\251]'s page"
[2] => "@[30042869909:32:Van Jones] on Bowe Bergdahl drama"
)
我想匹配删除@ [0-9]文本,所以我的输出如下:
Array
(
[0] => "(This is so cool!)"
[1] => "look at JAY Z and Beyonc\303\251's page"
[2] => "Van Jones on Bowe Bergdahl drama"
)
我尝试了很多东西(preg_replace等),但这个正则表达式是如此棘手,我无法得到我想要的结果!任何帮助表示赞赏.
我的测试文件是:
PolicyChain:ComplementaryUser Caught
PolicyChain:SourceIP Caught
我的正则表达式是:
cat testfile | grep -E -o '[^PolicyChain:].+?'
它匹配:
mplementaryUser Caught
SourceIP Caught
我最终只是想在冒号后但在空格之前匹配字符串.请帮忙？？
我想检查一行是否以标点符号(.,？!)结尾,如果没有,则添加句点.
A button is missing!
A button on their back allowed them to hug
A cat is carried by the scruff of its neck by a teenage boy?
A cattery is where cats are commercially housed
输出:
A button is missing!
A button on their back allowed them to hug.
A cat is carried by the scruff of its neck by a teenage boy?
A cattery is where cats are commercially housed.
我真的很难过,我试着点击一个字符串的最后一个字符 - 任何帮助？
对于匹配的if条件,如何为Python字典替换字符串中的单个字符？
鉴于:
if key[-1] == "d" and val[-1] == "t":
print key, val
versed v3rst
vexed vEkst
voiced vOIst
我想把最后一个字母"t"改为"d".我试过了:
if key[-1] == "d" and val[-1] == "t":
val[-1] = val[-1].replace("t", "d")
print key, val
但是我得到错误:
val[-1] = val[-1].replace("t", "d")
TypeError: 'str' object does not support item assignment
有小费吗？这似乎是一个简单的if和replace.
简单的 SQL 问题，我搜索了但似乎找不到已经提出的答案。
我想查询名称，然后查询每个名称的唯一 url 计数。
输入：
NAME URL
John google.com
John google.com
John youtube.com
Bob youtube.com
Bob twitter.com
期望的输出：
NAME URL_count
John 2
Bob 2
我试过：
SELECT DISTINCT(name), COUNT(URL) as URL_count
FROM database_table
WHERE date='2013-06-12'
似乎没有产生我需要的结果！帮助？
我从nltk抓取了文本语料库,现在想要处理它以确保文件中的每一行都以标点符号结束.
Her mother
had died too long ago for her to
remember her caresses; and her place had been supplied
by an excellent woman as governess, who had fallen little short
of a mother in affection.
应该成为:
Her mother had died too long ago for her to remember her caresses;
and her place had been supplied by an excellent woman as governess, who had fallen little short of a mother in affection.
我试过匹配,如果在行尾没有标点符号,但无法弄清楚如何向上移动下一行.非常感谢任何帮助!