- Python : 3.7.0
- OS : Ubuntu 18.04.1 LTS
- IDE : PyCharm 2018.2.4
- Conda : 4.5.11
- typesetting : Markdown
code
"""
@Author : 行初心
@Date : 18-9-23
@Blog : www.cnblogs.com/xingchuxin
@Gitee : gitee.com/zhichengjiu
"""
def main():
# 過濾器
# 通過 過濾器 可以保留自己需要資源
value = filter(None, [1, -1, 0, True, False, [1, 0, True, False], []])
value_list = list(value)
# 有內容的列表被保留了下來，沒有內容的列表被刪除
# True被保留，False被刪除
# 0被刪除 ，1被保留
print(value_list)
if __name__ == '__main__':
main()
result
/home/coder/anaconda3/envs/py37/bin/python /home/coder/PycharmProjects/DataStructure/demo.py
[1, -1, True, [1, 0, True, False]]
Process finished with exit code 0
more knowledge
Help on class filter in module builtins:
class filter(object)
| filter(function or None, iterable) --> filter object
|
| Return an iterator yielding those items of iterable for which function(item)
| is true. If function is None, return the items that are true.
|
| Methods defined here:
|
| __getattribute__(self, name, /)
| Return getattr(self, name).
|
| __iter__(self, /)
| Implement iter(self).
|
| __next__(self, /)
| Implement next(self).
|
| __reduce__(...)
| Return state information for pickling.
|
| ----------------------------------------------------------------------
| Static methods defined here:
|
| __new__(*args, **kwargs) from builtins.type
| Create and return a new object. See help(type) for accurate signature.
resource
- [文檔] docs.python.org/3
- [規范] www.python.org/dev/peps/pep-0008
- [規范] zh-google-styleguide.readthedocs.io/en/latest/google-python-styleguide/python_language_rules
- [源碼] www.python.org/downloads/source
- [ PEP ] www.python.org/dev/peps
- [平台] www.cnblogs.com
- [平台] gitee.com
Python具有開源、跨平台、解釋型、交互式等特性，值得學習。
Python的設計哲學：優雅，明確，簡單。提倡用一種方法，最好是只有一種方法來做一件事。
代碼的書寫要遵守規范，這樣有助於溝通和理解。
每種語言都有獨特的思想，初學者需要轉變思維、踏實踐行、堅持積累。