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python Programming Glossary: dictionaries

What does python sys.intern do, and when should it be used?

http://stackoverflow.com/questions/1136826/what-does-python-sys-intern-do-and-when-should-it-be-used

I came across this question about memory management of dictionaries which mentions the intern function. What exactly does it do.. used in Python programs are automatically interned and the dictionaries used to hold module class or instance attributes have interned..

Difference between __str__ and __repr__ in Python

http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python

.join l you can probably also figure out what to do about dictionaries. Summary Implement __repr__ for any class you implement. This..

Python: create a dictionary with list comprehension

http://stackoverflow.com/questions/1747817/python-create-a-dictionary-with-list-comprehension

python list comprehension syntax. Can it be used to create dictionaries too For example by iterating over pairs of keys and values mydict..

Python dictionary, keep keys/values in same order as declared

http://stackoverflow.com/questions/1867861/python-dictionary-keep-keys-values-in-same-order-as-declared

order as declared new to Python and had a question about dictionaries. I have a dictionary that I declared in a particular order and..

What are “named tuples” in Python?

http://stackoverflow.com/questions/2970608/what-are-named-tuples-in-python

in this situation. Named tuples can be converted to dictionaries using pt1._asdict which returns 'x' 1.0 'y' 5.0 and can be operated..

How are Python's Built In Dictionaries Implemented

http://stackoverflow.com/questions/327311/how-are-pythons-built-in-dictionaries-implemented

like to know but the answer is comprehensive . Python dictionaries are implemented as hash tables . Hash tables must allow for..

*args and **kwargs? [duplicate]

http://stackoverflow.com/questions/3394835/args-and-kwargs

an understanding of it. Maybe I think to enter lists and dictionaries as arguments of a function AND at the same time as a wildcard..

How can I merge (union) two Python dictionaries in a single expression?

http://stackoverflow.com/questions/38987/how-can-i-merge-union-two-python-dictionaries-in-a-single-expression

can I merge union two Python dictionaries in a single expression I have two Python dictionaries and I.. dictionaries in a single expression I have two Python dictionaries and I want to write a single expression that returns these two.. I want to write a single expression that returns these two dictionaries merged. The update method would be what I need if it returned..

How do you retrieve items from a dictionary in the order that they're inserted?

http://stackoverflow.com/questions/60848/how-do-you-retrieve-items-from-a-dictionary-in-the-order-that-theyre-inserted

It includes links to various implementations of ordered dictionaries see also these two recipes in the Python Cookbook . You might..

Python: Sort a dictionary by value

http://stackoverflow.com/questions/613183/python-sort-a-dictionary-by-value

post and probably could change my code to have a list of dictionaries but since I do not really need a list of dictionaries I wanted.. of dictionaries but since I do not really need a list of dictionaries I wanted to know if there a simpler solution. python list dictionary..

What is the best way to implement nested dictionaries in Python?

http://stackoverflow.com/questions/635483/what-is-the-best-way-to-implement-nested-dictionaries-in-python

is the best way to implement nested dictionaries in Python I have a data structure which essentially amounts.. state county profession I have to create the lower layer dictionaries via obnoxious try catch blocks. Moreover I have to create annoying..

Security of Python's eval() on untrusted strings?

http://stackoverflow.com/questions/661084/security-of-pythons-eval-on-untrusted-strings

to the program. Obviously eval string without custom dictionaries is unsafe in most cases. python security eval share improve..

In Python how do I sort a list of dictionaries by values of the dictionary?

http://stackoverflow.com/questions/72899/in-python-how-do-i-sort-a-list-of-dictionaries-by-values-of-the-dictionary

Python how do I sort a list of dictionaries by values of the dictionary I got a list of dictionaries and.. dictionaries by values of the dictionary I got a list of dictionaries and want that to be sorted by a value of that dictionary. This..

python dictionary sort by key

http://stackoverflow.com/questions/9001509/python-dictionary-sort-by-key

dictionary share improve this question Standard Python dictionaries are unordered. Even if you sorted the key value pairs you wouldn't..

“Adding” Dictionaries in Python? [duplicate]

http://stackoverflow.com/questions/1031199/adding-dictionaries-in-python

Adding&rdquo Dictionaries in Python duplicate Possible Duplicate python dict.add_by_value..

combine modelformset and inlineformset in django views

http://stackoverflow.com/questions/11929355/combine-modelformset-and-inlineformset-in-django-views

can come up with that will work. I would create a List of Dictionaries. Each Dictionary will have a baseForm key which will hold your..

How to implement Caesar cipher [duplicate]

http://stackoverflow.com/questions/13216749/how-to-implement-caesar-cipher

NOT for the exam python share improve this question Dictionaries in Python don't preserve a particular order. So you can't be..

How do I do variable variables in Python?

http://stackoverflow.com/questions/1373164/how-do-i-do-variable-variables-in-python

this question Use dictionaries to accomplish this. Dictionaries are stores of keys and values. dict 'x' 1 'y' 2 'z' 3 dict 'y'..

Java Equivalent to Python Dictionaries

http://stackoverflow.com/questions/1540673/java-equivalent-to-python-dictionaries

Equivalent to Python Dictionaries I am a long time user of Python and really like the way that..

can't multiply sequence by non-int of type 'str' Dont understand

http://stackoverflow.com/questions/18261018/cant-multiply-sequence-by-non-int-of-type-str-dont-understand

way to affect your code. Instead you can use a dictionary. Dictionaries map strings to values and so you can take your variable declarations..

In what order should the Python concepts be explained to absolute beginners? [closed]

http://stackoverflow.com/questions/2439638/in-what-order-should-the-python-concepts-be-explained-to-absolute-beginners

they master it perfectly this is very very important. Dictionaries with common errors. Nesting with tuples and lists. Insist on..

Items ordering in Python dictionary

http://stackoverflow.com/questions/3127945/items-ordering-in-python-dictionary

created python dictionary share improve this question Dictionaries are unordered containers if you want to preserve order you can..

Memory Efficient Alternatives to Python Dictionaries

http://stackoverflow.com/questions/327223/memory-efficient-alternatives-to-python-dictionaries

Efficient Alternatives to Python Dictionaries In one of my current side projects I am scanning through some..

How are Python's Built In Dictionaries Implemented

http://stackoverflow.com/questions/327311/how-are-pythons-built-in-dictionaries-implemented

are Python's Built In Dictionaries Implemented Does anyone know how the built in dictionary type..

Ordering in Python (2.4) dictionary

http://stackoverflow.com/questions/3469633/ordering-in-python-2-4-dictionary

Python version python share improve this question Dictionaries are unordered that is they do have some order but it's influenced..

Python: Should I use a class or dictionary?

http://stackoverflow.com/questions/4045161/python-should-i-use-a-class-or-dictionary

Classes are for bundling related data and usually code . Dictionaries are for storing key value relationships where usually the keys..

python looping seems to not follow sequence?

http://stackoverflow.com/questions/4123266/python-looping-seems-to-not-follow-sequence

list dictionary for loop share improve this question Dictionaries are not ordered. If you need to rely on the ordering you need..

Textually diffing JSON

http://stackoverflow.com/questions/4599456/textually-diffing-json

sequence types lists tuples etc sets and dictionaries. Dictionaries and sequences will be diffed recursively when applicable. ..

Store a list of dictionaries in GAE

http://stackoverflow.com/questions/5874009/store-a-list-of-dictionaries-in-gae

question Welcome to Stack Overflow I see a few issues Dictionaries are not supported value types for App Engine properties. You're..

reverse dictionary order

http://stackoverflow.com/questions/6083531/reverse-dictionary-order

way to do this python share improve this question Dictionaries are not ordered . So there is no way to do it. If you have python2.7..

python: Dictionaries of dictionaries merge

http://stackoverflow.com/questions/7204805/python-dictionaries-of-dictionaries-merge

Dictionaries of dictionaries merge I need to merge multiple dictionaries..

Create a function that opens a file and creates a dictionary

http://stackoverflow.com/questions/8117441/create-a-function-that-opens-a-file-and-creates-a-dictionary

comment and your preview code you are on the right track. Dictionaries in Python are passed by reference so you should just be able..