我有这样的事情:“我的item1,item2,item3,item4,”
我只想答案:“item4”
我用这个:
(?<=\,).*(?=\,$)
但它返回我:“item2,item3,item4”
我怎么才能得到最后一个?
我知道那些懒惰的标志? ,但我无法使用它。
感谢您的帮助。
答案 0 :(得分:1)
使用.*
代替.
,因为.*?
也会匹配字符逗号。这里非贪婪的表格(?<=,)[^,]*(?=,$)
也不起作用。
# Byte-compiled / optimized / DLL files
__pycache__/
*.py[cod]
*$py.class
# C extensions
*.so
# Distribution / packaging
.Python
env/
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
*.egg-info/
.installed.cfg
*.egg
# PyInstaller
# Usually these files are written by a python script from a template
# before PyInstaller builds the exe, so as to inject date/other infos into it.
*.manifest
*.spec
# Installer logs
pip-log.txt
pip-delete-this-directory.txt
# Unit test / coverage reports
htmlcov/
.tox/
.coverage
.coverage.*
.cache
nosetests.xml
coverage.xml
*,cover
# Translations
*.mo
*.pot
# Django stuff:
*.log
# Sphinx documentation
docs/_build/
# PyBuilder
target/
答案 1 :(得分:0)
只是一个建议,你也可以使用split命令,如下所示:
x = "my item1,item2,item3,item4"
print x.split(",")[-1]
这将打印最后一个元素。