标签:help bash new .com 思想 ubuntu 学习 inf pyc
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- ???????Python : 3.7.0
- ?????????OS : Ubuntu 18.04.1 LTS
- ????????IDE : PyCharm 2018.2.4
- ??????Conda : 4.5.11
- ???typesetting : Markdown
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"""
@Author : 行初心
@Date : 18-9-23
@Blog : www.cnblogs.com/xingchuxin
@Gitee : gitee.com/zhichengjiu
"""
def main():
# 过滤器
# 通过 过滤器 可以保留自己需要资源
value = filter(None, [1, -1, 0, True, False, [1, 0, True, False], []])
value_list = list(value)
# 有内容的列表被保留了下来,没有内容的列表被删除
# True被保留,False被删除
# 0被删除 ,1被保留
print(value_list)
if __name__ == '__main__':
main()
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/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
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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.
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Python具有开源、跨平台、解释型、交互式等特性,值得学习。
Python的设计哲学:优雅,明确,简单。提倡用一种方法,最好是只有一种方法来做一件事。
代码的书写要遵守规范,这样有助于沟通和理解。
每种语言都有独特的思想,初学者需要转变思维、踏实践行、坚持积累。
Python3基础 list 查看filter()返回的对象
标签:help bash new .com 思想 ubuntu 学习 inf pyc
原文地址:https://www.cnblogs.com/xingchuxin/p/10440891.html