Add « dictionary « Python Data Type Q&A

1. How do I add a Python-style Get() method which takes a default value to my C# dictionaries?    stackoverflow.com

I'd like to be able to specify a default value to return if the key I specify can't be found in the dictionary. e.g.

int default = 5;
string key = "MyKey";
int foo = ...

2. python dict.add_by_value(dict_2)?    stackoverflow.com

The problem:

>>> a = dict(a=1,b=2    )
>>> b = dict(    b=3,c=2)

>>> c = ???

c = {'a': 1, 'b': 5, 'c': 2}

3. Add to a dictionary in python?    stackoverflow.com

Is it possible to add a key to a python dictionary after it has been created? It doesn't seem to have an .add() method...

4. "Adding" Dictionaries in Python?    stackoverflow.com

Possible Duplicate:
python dict.add_by_value(dict_2) ?

5. Fastest ways to key-wise add a list of dicts together in python    stackoverflow.com

Say I have a bunch of dictionaries

a = {'x': 1.0, 'y': 0.5, 'z': 0.25 }
b = {'w': 0.5, 'x': 0.2 }

6. Python dictionary simple way to add a new key value pair    stackoverflow.com

Say you have,

foo = 'bar'
d = {'a-key':'a-value'}

d = {'a-key':'a-value','foo':'bar'}
e = {'foo':foo}

d['foo'] = foo

#Either of the following for e
e = {'foo':foo}
e = dict(foo=foo)

7. how to add all of these values in a python dictionary    stackoverflow.com

last one for the night, want to see what clever ways there are with python to add all of the 'count' values from the following type of dictionary:

{0: {'count': 1000}, 1: ...

8. Python dictionary: add or increment entry    stackoverflow.com

I'm currently re-engaging with Python after a long absence and loving it. However, I find myself coming across a pattern over and over. I keep thinking that there must be a ...

9. How would I merged nested dictionaries in a list in python?    stackoverflow.com

for example if i had the result

[{'Germany': {"Luge - Men's Singles": 'Gold'}}, 
{'Germany': {"Luge - Men's Singles": 'Silver'}},
{'Italy': {"Luge - Men's Singles": 'Bronze'}}]
[{'Germany': {"Luge - Women's Singles": 'Gold'}},
{'Austria': {"Luge - ...

10. using Python to import a CSV (lookup table) and add GPS coordinates to another output CSV    stackoverflow.com

So I have already imported one XML-ish file with 3000 elements and parsed them into a CSV for output. But I also need to import a second CSV file with 'keyword','latitude','longitude' ...

11. How to add key,value pair to dictionary?    stackoverflow.com

How to add key,value pair to dictionary?.Below i have mentioned following format?

{'1_somemessage': [[3L,
                   ...

12. Adding or merging python dictionaries without loss    stackoverflow.com

I'm trying to count up ip addresses found in a log file on two servers and then merge the dictionary stats together without loosing elements or counts. I found a partial ...

13. Add new keys to a dictionary while incrementing existing values    stackoverflow.com

I am processing a CSV file and counting the unique values of column 4. So far I have coded this three ways. One uses "if key in dictionary", the second traps ...

14. Adding new Keys to a Dictionary    stackoverflow.com

lst = {}

try:
    lst[someKey].append(someValue)
except KeyError:
    lst[someKey] = []
    lst[someKey].append(someValue) # redundant ?

15. Adding dictionary indexes through a function    stackoverflow.com

I've been trying on how to add a new index in a dictionary using a for loop.
I want to keep adding indexes with a for loop each time I enter the ...

16. Counting with python dictionaries and adding functionality    stackoverflow.com

 a = 0
 b = 0
 c = 0
 d = 0

fruit = {
'lemons': [],
'apples': [],
'cherries': [],
'oranges': [],
 }


def count():
    fruit = input("What fruit are you getting ...

17. "Programmatically" add stuff to a class?    stackoverflow.com

I'm writing a class that has a dict containing int to method mappings. However setting the values in this dict results in the dict being populated with unbound functions.

class A:
 ...

18. Python: Populate or add value to current value in a dictionary    stackoverflow.com

I have data in the form of

00 154
01 72
02 93
03 202
04 662
05 1297
00 256

19. adding a layer to a dictionary    stackoverflow.com

I have a global dictionary like the following in my code:

param_values = {
            'aa' : [(-1,-1),   (-1,-1), ...

20. Python dictionary, adding a new value to key if present multiple times in list    stackoverflow.com

Im trying to split a string of letters into a dictionary which automatically adds the value +1 for every letter present more than once. The only problem is that my code adds ...

21. How can I add all values in a list of dictionaries?    stackoverflow.com

Is there a simple way of getting the total price of all the fruits in a list of dictionaries in Python?

[{'name':'apple','price':10},{'name':'banana','price':5},{'name':'grapes','price':15}]

22. adding new pair in dictionary why the last added 'mynewkey': 'mynewvalue' came first in dictionary    stackoverflow.com

>>> d = {'key':'value'}
>>> print d
{'key': 'value'}
>>> d['mynewkey'] = 'mynewvalue'
>>> print d
{'mynewkey': 'mynewvalue', 'key': 'value'}

23. python: adding to a dict gives error    stackoverflow.com

playlist = {}
playlist.update(position, title)

24. How do I add a list of dictionaries to another list of dictionaries?    stackoverflow.com

I'm using a for loop to add a dictionary to a list of dictionaries (which I'm calling data_file), using data_file.append() It works fine :) But then later I try to add some ...

25. python add dictionary to existing dictionary    stackoverflow.com

What am I doing wrong here? The append inside the dictionary doesn't seem to be working

final = []

topid = { 
    "ida" : "ida",
    "idb" ...

26. Adding few values into a single value in a dictionary    stackoverflow.com

I have a dictionary with strings as keys, and lists of strings as values. How do I append an additional string to a given key? For example, given:

dic = {"i'm": ['the']}

27. Adding keys to a dictionary    bytes.com

28. Adding dictionary indexes through a function.    dreamincode.net

Hi, I've been trying on how to add a new index in a dictionary using a for loop. I want to keep adding indexes with a for loop each time I enter the value, the 'index' through a function. So the dictionary just keep growing. For example: My dictionary has it's values as lists, and to add values to that list, ...

29. Adding Values in Dictionaries    python-forum.org

Hi, Ok, so I have this partial program that will read a text document line for line. It will put each line of the users tech id, name, etc into a list and each list into a final dictionary. Now my question is, how would I make it so that I could manually add certain numbers parts of the lists in ...

30. adding wxtextctrl objects to list/dictionary    python-forum.org

adding wxtextctrl objects to list/dictionary by MonsterAdurm Mon Feb 28, 2011 8:36 pm Hi, im trying to cleanup/organise my code a bit better. Atm i have about 30 textbox properties in a panel that define how an object moves/behaves on the screen. Ive set them all up individually in previous versions and I thought it would be easier, more succinct, ...

31. add key-value into dictionary    python-forum.org

add key-value into dictionary by futhonguy Thu Jul 15, 2010 6:28 pm hi there, i have a set of information below that i would like to use to create a report. I'm a newbie to python programming and would appreciate if help is available for me to understand the uses of this language. Basically using the set of information, i ...

32. Dictionary - adding key without overwriting existing key    python-forum.org

Dictionary - adding key without overwriting existing key by merlinemrys Sun Oct 19, 2008 2:35 pm Hi @ all, I would like to build up a dictionary to count the frequency of some events during calculation some values. The dictionry should store the values like: Code: Select all mydict = {'a': {3: 1, 4: 16, 2: 18}, 'b': {9: 11, ...

33. adding second value to dictionary    python-forum.org

sooo close :S by kdt Mon Jul 23, 2007 2:50 am For some strange reason this part of the code executes 3 times before displaying the above error message. Can someone please help to debug what the problem is. The offending line is in bold. Code: Select all from string import * def compare(list): line_num=0 ...

34. Adding to a existing dictionary    python-forum.org

myDict = {} def loadDict( file_name ): for line in file( file_name ): line = line[0:-1] # remove newline at line end (key, value) = line.split( ':' ) myDict[key] = value