[英]Python, regex to filter elements endswith a style in a list
使用正則表達式,我想找出列表中的哪些元素,以樣式(yyyy-mm-dd)結尾,例如(2016-05-04)等。
模式r'(2016- \\ d \\ d- \\ d \\ d)'看起來還算天真。 將它與Endswith結合的正確方法是什么?
謝謝。
import re
a_list = ["Peter arrived on (2016-05-04)", "Building 4 floor (2020)", "Fox movie (2016-04-04)", "David 2016-08-", "Mary comes late(true)"]
style = r'\(2016\-\d\d\-\d\d\)'
for a in a_list:
if a.endswith(style):
print a
您不能將正則表達式與字符串操作結合使用。 只需使用re.search
查找匹配項,然后在模式中使用錨點$
檢查匹配項是否在末尾發生
>>> import re
>>> style = re.compile(r'\(2016-\d\d-\d\d\)$')
>>> for a in a_list:
... if style.search(a):
... print (a)
...
Peter arrived on (2016-05-04)
Fox movie (2016-04-04)
使用r'\\(\\d{4}-\\d{2}-\\d{2}\\)$'
例如:
import re
a_list = ["Peter arrived on (2016-05-04)", "Building 4 floor (2020)", "Fox movie (2016-04-04)", "David 2016-08-", "Mary comes late(true)"]
style = r'\(\d{4}-\d{2}-\d{2}\)$'
for a in a_list:
if re.search(style, a):
print a
輸出:
Peter arrived on (2016-05-04)
Fox movie (2016-04-04)
這將是
.*\(2016\-\d{2}\-\d{2}\)$
$符號在末尾表示
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