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  • Iterate through the elements in the dictionary The output: Key:username Value:sunny Key:lastname Value:sun Key:firstname Value:changqi The Codes: user_0 = { 'username':'sunny', 'lastname':'...

    Iterate through the elements in the dictionary

    The output:

    Key:username Value:sunny
    
    Key:lastname Value:sun
    
    Key:firstname Value:changqi

    The Codes:

    user_0 = {
        'username':'sunny',
        'lastname':'sun',
        'firstname':'changqi',
        }
    for key,value in user_0.items():
        print('\nKey:'+key+' Value:'+value)

     

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  • Rebuilding the dictionary

    2020-12-08 23:41:02
    <div><p>In order to get some more useful file names the dictionary has to be rebuild. <p>In DSII I obtained most file names by injecting a DLL into the game that hooked the file name hashing function ...
  • It misses the audio part, which I suppose needs to be done redirecting to the Wordnik's API, but how? Do you have any particular function to redirect requests to other Spice APIs? I've first ...
  • Locale in the dictionary

    2020-12-03 04:23:19
    * Perhaps we should someday get it from the dictionary ?? */ </code></pre> <p>For dictionaries which doesn't specify a locale, the mechanism will be like now (setting the locale from the ...
  • The Data Dictionary

    2012-11-06 23:41:00
    Introduction to the Data Dictionary One of the most important parts of an Oracle database is its data dictionary, which is a ready-only set of tables that provides information about the database...

    Introduction to the Data Dictionary

    One of the most important parts of an Oracle database is its data dictionary, which is a ready-only set of tables that provides information about the database. A data dictionary contains:

    - The definitions of all schema objects in the database (tables, views, indexes, clusters, synonyms, sequences, procedures, functions, packages, triggers, and so on)

    - How much space has been allocated for, and is currently used by, the schema objects.

    - Default values for columns

    - The names of Oracle users

    - Privileges and roles each user has been granted

    - Auditing information, such as who has accessed or updated various schema objects

    - Other general database information

    The data dictionary is structured in tables and views, just like other database data. All the data dictionary tables and views for a given database are stored in that database's SYSTEM tablespace.

    Not only is the data dictionary central to every Oracle database, it is an important tool for users, from end users to application designers and database administrators. Use SQL statements to access the data dictionary. Because the data dictionary is read only, you can issue only queries (SELECT statements) against it's tables and views.

    Structure of the Data Dictionary

    The data dictionary consists of the following:

    Base Tables - The underlying tables that store information about the associated database. Only Oracle should write to and read these tables. Users rarely access them directly because they are normalized, and most of the data is stored in a cryptic format.

    User-Accessible Views - The views that summarize and display the information stored in the base tables of the data dictionary. These views decode the base table data into useful information, such as user or table names, using joins and WHERE clauses to simplify the information. Most users are given access to the views rather than the base tables.

    SYS, Owner of the Data Dictionary The Oracle user SYS owns all base tables and user-accessible views of the data dictionary. No Oracle user should ever alter (UPDATE, DELETE, or INSERT) any rows or schema objects contained in the SYS schema, because such activity can compromise data integrity. The security administrator must keep strict control of this central account.

    How the Data Dictionary Is Used the data dictionary has three primary uses:

    - Oracle accesses the data dictionary to find information about users, schema objects, and storage structures.

    - Oracle modifies the data dictionary every time that a data definition language (DDL) statement is issued.

    - Any Oracle user can use the data dictionary as a read-only reference for information about the database.

    How Oracle Uses the Data Dictionary

    Data in the base tables of the data dictionary is necessary for Oracle to function. Therefore, only Oracle should write or change data dictionary information.Oracle provides scripts to modify the data dictionary tables when a database is upgraded or downgraded.

    During database operation, Oracle reads the data dictionary to ascertain that schema objects exist and that users have proper access to them. Oracle also updates the data dictionary continuously to reflect changes in database structures, auditing, grants, and data.

    - Public Sysnonyms for Data Dictionary Views Oracle creates public synonyms for many data dictionary views so users can access them conveniently. The security administrator can also create additional public synonyms for schema objects that are used systemwide. Users should avoid naming their own schema objects with the same names as those used for public synonyms.

    - Cache the Data Dictionary for Fast Access Much of the data dictionary information is kept in the SGA in the dictionary cache, because Oracle constantly accesses the data dictionary during database operation to validate user access and to verify the state of schema objects. All information is stored in memory using the least recently used(LRU) algorithm.

    - Other Programs and the Data Dictionary Other Oracle products can reference existing views and create additional data dictionary tables or views of their own. Application developers who write programs that refer to the data dictionary should refer to the public synonyms rather than the underlying tables: the synonyms are less likely to change between software releases.

    How to Use the Data Dictionary

    The views of the data dictionary serve as a reference for all database users. Access the data dictionary view with SQL statements. Some views are accessible to all Oracle users, and others are intended for database administrators only.

    The data dictionary is always available when the database is open. It resides in the SYSTEM tablespace, which is always online.

    The data dictionary consists of sets of views. In many cases, a set consists of three views containing similar information and distinguished from each other by their prefixes:

    Views with the Prefix USER

    The views most likely to be of interest to typical database users are those with the prfix USER. These views:

    - Refer to the user's own private environment in the database, including information about schema objects created by the user, grants made by the user, and so on

    - Display only rows pertinent to the user

    - Have columns identical to the other views, except that the column OWNER is implied.

    - Return a subset of the information in the ALL views

    - Can have abbreviated PUBLIC synonyms for convenience

    e.g: SELECT objecvt_name, object_type FROM USER_OBJECTS;

    Views with the Prefix ALL

    Views with the prefix ALL refer to the user's overall perspective of the database. These views return information about schema objects to which the user has access through public or explicit grants o fprivileges an roles, in addition to schema objects that the user owns. For example, the following query returns information about all the objects to which you have access:

    SELECT owner, object_name FROM ALL_OBJECTS;

    Views with the Prefix DBA

    Views with the prefix DBA show a global view of the entire database. Synonyms are not created for these views, because DBA views should be queried only by administrators. Therefore, to query the DBA views, adminstrators must prefix the view name with its owner, SYS, as in the following:

    SELECT owner, object_name FROM SYS.DBA_OBJECTS;

    Oracle recommends that you implement data dictionary protection to prevent users having the ANY system privileges from using such privileges on the data dictionary. If you enable dictionary protection (07_DICTIONARY_ACCESSIBILITY is false), then access to objects in the SYS schema (dictionary objects) is restricted to users with the SYS schema. These users are SYS and those who connect as SYSDBA.

    The DUAL Table

    The table named DUAL is a small table in the data dictionary that Oracle and user-written programs can reference to guarantee a known result. This table has one column called DUMMY and one row containing the value X.

    Dynamic Performance Tables

    Throughout its operation, Oracle maintains a set of virtual tables that record current database activity. These tables are called dynamic performance tables.

    Dynamic performance tables are not true tables, and they should not be accessed by most users. However, database administrators can query and create views on the tables and grant access to those views to other users. These views are somethimes called fixed views because they cannot be altered or removed by the database administrator..

    SYS owns the dynamic performance tables; their names all begin with V_$. Views are create on these tables, and then public synonyms are created for the views. The synonym names begin with V$. For example, the V$DATAFILE view contains information about the dtabase's datafiles, and the V$FIXED_TABLE view contains information about all of the dynamic performance tables and views in the database.

    转载于:https://www.cnblogs.com/landexia/archive/2012/11/06/2757962.html

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  • The Flat Dictionary

    2014-08-05 10:08:00
    The Flat Dictionary 原来的代码没处理dict为空的情况 1 def flatten(dictionary): 2 #[] is a list 3 #() is a tuple 4 stack = [((), dictionary)] 5 6 result = {} #result is a dict 7 ...

    The Flat Dictionary

    原来的代码没处理dict为空的情况

     1 def flatten(dictionary):
     2     #[] is a list
     3     #() is a tuple
     4     stack = [((), dictionary)]
     5 
     6     result = {} #result is a dict
     7 
     8     while stack:
     9         path, current = stack.pop() #get a tuple
    10 
    11         for k, v in current.items(): #dict::items return key and values tuple
    12             if isinstance(v, dict): #is a instance of dict
    13                 stack.append((path + (k,), v)) #add key to tuple such as (xxx, yyy, zzz) and the element in stack is like ((xxx, yyy, zzz), value)
    14             else:
    15                 result["/".join((path + (k,)))] = v
    16 
    17         if len(current) == 0: #when the dict is empty
    18             result["/".join(path)] = ""
    19 
    20     return result

    (k,)一个元素的tuple

    转载于:https://www.cnblogs.com/hzhesi/p/3891625.html

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  • <p>I noticed in the source code that <code>GenericDictionaryAssertions</code> uses intersect to compare the keys from the dictionary and the unexpected keys, which does not use the equality comparer ...
  • 数据字典 The Relational Database Dictionary
  • <div><p>I need to create an interactive form (AcroForm) if it does not exist in a...Then, check and add a Font entry in the DR dictionary of the AcroForm dictionary. How to achieve that in this library? ...
  • Is there a way to use the gspread to write the data of a dictionary at once. <p>something like DictWriter in CSV module! <p>thanks </p><p>该提问来源于开源项目:burnash/gspread</p></div>
  • ll include fetching from the dictionary the name, fetching the volume info and the error messages all over. <p>No functional changes right now.</p><p>该提问来源于开源项目:gluster/glusterfs</p>...
  • <p>But the order of the species in the dictionary should not affect whether RMG can find all the species or not. </p><p>该提问来源于开源项目:ReactionMechanismGenerator/RMG-Py</p></div>
  • The Visual Dictionary of Human Being lets you discover the structure of the human body and its constitutive organs, and have a look to equipment used to ensure everybody's health and well-being.,解压...
  • <div><p>Provide a clear and easily accessible user interface for adding or replacing a dictionary entry at any time during a Plover session. This might be as simple as defining a meta command to pop ...
  • <ul><li>Add a lock on updating the dictionary by multiple threads.</li></ul> <h2>Reference/Link to the issue solved with this PR (if any) 该提问来源于开源项目:Azure/azure-iot-sdk-csharp</p></...
  • elements of the content in the shorthand xml.</li><li>The build system identifies the required CPEs and generates the appropriate product <code>cpe-dictionary</code>.</li><li>The the main product ...
  • <div><p>When building the dictionary, some lemmas are silently dropped. <p>The test case is attached. The form: <p>odgrywać|pact:pl:gen.loc:m1.m2.m3.f.n1.n2.p1.p2.p3:imperf:aff:refl.nonrefl <p>has no...
  • <div><p><code>unsavedChanges</code> is an internal method, do we really need to copy the dictionary in order to make it immutable? Unless someone casts it back to mutable, what would be the harm to ...
  • // Sort dictionary by the value field List<KeyValuePair<int, int>> redBallsList = redBallsDict.ToList(); List<KeyValuePair<int, int>> bl...
                // Sort dictionary by the value field
                List<KeyValuePair<int, int>> redBallsList = redBallsDict.ToList();
                List<KeyValuePair<int, int>> blueBallsList = blueBallsDict.ToList();
    
                redBallsList.Sort((firstPair, nextPair) =>
                {
                    //return nextPair.Value.CompareTo(firstPair.Value);
                    return -1 * firstPair.Value.CompareTo(nextPair.Value);
                }
                );
    
                blueBallsList.Sort((firstPair, nextPair) =>
                {
                    //return nextPair.Value.CompareTo(firstPair.Value);
                    return -1 * firstPair.Value.CompareTo(nextPair.Value);
                }
                );
    
                // Sort an int Arrary
                int[] PerfectBallsIntArr = new int[6];
                for (int i = 0; i < 6; i++)
                {
                    PerfectBallsIntArr[i] = Convert.ToInt32(PerfectBallsArr[i]);
                }
    
                Array.Sort(PerfectBallsIntArr);

     

    转载于:https://www.cnblogs.com/researcher/p/5004985.html

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  • The Illustrated Dictionary of Electronics
  • <p>Changed the vertical alignment of the dictionary pathes in the "Dictionary" tab from top to center. <h3>Reason <p>Looks nicer. <h3>Tested Platforms <p>Debian (LMDE)</p><p>该提问来源于开源...
  • <p>the given key was not present in the dictionary <h2>Environment data <p><code>dotnet --info</code> output: <p>.NET Command Line Tools (1.0.0-rc2-002543) <p>Product Information: Version: 1.0.0-rc2-...
  • <div><p>Added all of the vanilla records to the ore dictionary. Would be helpful for those adding new records or those using records in crafting recipes. </p><p>该提问来源于开源项目:...
  • Looking at the code, it quickly becomes clear why: To find an object, the whole dictionary is searched in a loop (i.e. ...
  • We can stop RedPen flagging 「コミュニティー」 by adding it to the KatakanaEndHyphen word list or dictionary, but this results in neither word being flagged. We want 「コミュニティ」 to be flagged. I...
  • <div><p>Tried to add a Unicode character to the dictionary in Notepad++ and it gave me an error message: <h2>Word cannot be added <h2>Sadly, this word contains symbols out of current ...
  • <div><p>Is it possible to incorporate the pyim-greatdict dictionary found <a href="https://github.com/tumashu/pyim-greatdict">here</a>? It looks a good dictionary with over 3 million words. Thanks....
  • System.ArgumentException: The key already existed in the dictionary. at System.Collections.Concurrent.ConcurrentDictionary<code>2.System.Collections.Generic.IDictionary.Add(TKey key, TValue value) ...
  • Your program fails to do its job if the dictionary you're choosing from is too large for the humans to be able to immediately recognize and understand most of the words. Most people have a ...

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