使用python来做正则表达式：

import re

txt = "xcv xfr wfs"

#Check if the string ends with "wfs":
x = re.findall("wfs\Z", txt)
print(x)

if x:
  print("Yes, there is a match!")
else:
  print("No match")

txt_new = "234 2432 sw 543 sdfsd"
y = re.findall("sdf\Z", txt_new)
print(y)
if y:
    print("Yes, there is a match!")
else:
    print("No match")

字符 \Z: Returns a match if the specified characters are at the end of the string

结果如下：

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