大约有 45,000 项符合查询结果(耗时:0.0394秒) [XML]

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How to use a dot “.” to access members of dictionary?

... You can do it using this class I just made. With this class you can use the Map object like another dictionary(including json serialization) or with the dot notation. I hope to help you: class Map(dict): """ Example: m = Ma...
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How does Python's super() work with multiple inheritance?

...e understanding the super() function (new style classes) especially when it comes to multiple inheritance. 16 Answers ...
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Inverse dictionary lookup in Python

Is there any straightforward way of finding a key by knowing the value within a dictionary? 13 Answers ...
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MySQL vs MongoDB 1000 reads

I have been very excited about MongoDb and have been testing it lately. I had a table called posts in MySQL with about 20 million records indexed only on a field called 'id'. ...
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How do I correctly clean up a Python object?

__del__(self) above fails with an AttributeError exception. I understand Python doesn't guarantee the existence of "global variables" (member data in this context?) when __del__() is invoked. If that is the case and this is the reason for the exception, how do I make sure the object destructs...
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Shards and replicas in Elasticsearch

...t shard and replica is in Elasticsearch, but I didn't manage to understand it. If I download Elasticsearch and run the script, then from what I know I have started a cluster with a single node. Now this node (my PC) have 5 shards (?) and some replicas (?). ...
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What is __future__ in Python used for and how/when to use it, and how it works

... modules. I do not understand what __future__ is for and how/when to use it even after reading the Python's __future__ doc . ...
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How is __eq__ handled in Python and in what order?

Since Python does not provide left/right versions of its comparison operators, how does it decide which function to call? 3...
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__FILE__ macro shows full path

...follow | edited Apr 22 '15 at 20:00 Jayesh 44.6k1919 gold badges6868 silver badges9292 bronze badges ...
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When is “i += x” different from “i = i + x” in Python?

...This depends entirely on the object i. += calls the __iadd__ method (if it exists -- falling back on __add__ if it doesn't exist) whereas + calls the __add__ method1 or the __radd__ method in a few cases2. From an API perspective, __iadd__ is supposed to be used for modifying mutable objects i...