iterate « dictionary « Python Data Type Q&A

1. In Python, how to I iterate over a dictionary in sorted order?    stackoverflow.com

There's an existing function that ends in:

return dict.iteritems()

2. How do I iterate over a Python dictionary, ordered by values?    stackoverflow.com

I've got a dictionary like:

{ 'a': 6, 'b': 1, 'c': 2 }

(b, 1)
(c, 2)
(a, 6)

3. Iterating over key and value of defaultdict dictionaries    stackoverflow.com

The following works as expected:

d = [(1,2), (3,4)]
for k,v in d:
  print "%s - %s" % (str(k), str(v))

d = collections.defaultdict(int)
d[1] = 2
d[3] = 4
for k,v in d:
  ...

4. In Python - a way to choose which dictionary to iterate over (and manipulate values in)    stackoverflow.com

Here's my problem: Lets say I have two dictionaries, dict_a and dict_b. Each of them have similar keys and values that I can manipulate in the same way, and in fact that's ...

5. Iterating over Dictionaries...For Loops in Python    stackoverflow.com

Am a bit puzzled by the following code:

d = {'x': 1, 'y': 2, 'z': 3} 
for key in d:
    print key, 'corresponds to', d[key]

6. Why do you have to call .iteritems() when iterating over a dictionary in python?    stackoverflow.com

Why do you have to call iteritems() to iterate over key, value pairs in a dictionary? ie

dic = {'one':'1', 'two':'2'}
for k, v in dic.iteritems():
    print k, v

7. Iterate through a dictionary and return results in a table    stackoverflow.com

I`m looking at printing the content of a dictionary into a table, the dictionary is defined like this :

d = {"date": tuple(date),"open":tuple(open),"close":tuple(close),"min":tuple(min),"max":tuple(max),"gain":tuple(gain),"loss":tuple(loss),"avg_gain":tuple(avg_gain),"avg_loss":tuple(avg_loss)}

8. How to Iterate a dictionary of references to matplotlib figures    stackoverflow.com

I have a number of functions each of which creates one or more figures. As the figures are created, a reference is added to a dictionary, like so:

self.figures['figureKey'] = figure()

9. Python query: iterating through log file    stackoverflow.com

Please can someone help me solve the following query? I have a log file with thousands of lines like the following:-

    jarid: 7e5ae720-9151-11e0-eff2-00238bce4216 recv: 1 timestamp: 00:00:02,217
   ...

10. iterating dictionary and fetching values from inner dictionaries    stackoverflow.com

am trying to build a logic which am not quit sure how to do with python. I have the following dictionary

{datetime.datetime(2011, 7, 18, 13, 59, 25): (u'hello-world', u'hello world'), datetime.datetime(2011, ...

11. Python: Iterate dictionary that has set() as its value    stackoverflow.com

I have dictionary where values are python sets, When I iterate without properly handling the sets, this is what I get.

Press Enter to continue...
Kunnskap set([])
Samfunn set([])
Helse set([])
Natur set([])
Geografi set([])
Teknologi set([])
Historie set([])
Dagligliv ...

12. Need Help in Iterating and Subtracting Dictionary Values    python-forum.org

I have the following: dict1: {1: array([23, 22, 24]), 2: array([22, 25, 27]), etc.} dict2: {same idea} dict3: {same idea} Where the keys are integers (not strings) and the values are arrays of three dimensional coordinates. I would like to compute a vector by iterating through any 2 dictionaries and subtracting the value of one dictionary from another. One condition that ...

13. Iterating over a dictionary to find particular key/values    python-forum.org

Hi, I am having troubles answering the following problem, any help would be appreciated. Consider a dictionary that has strings as keys and integers as values. Write a function big_keys that takes such a dictionary as the first argument and returns the list of keys all of whose values are bigger than the second argument. You must use a for loop ...

14. Iterating Over Dictionary From Arbitrary Location    python-forum.org

Hi all. I am new to Python and have a problem regarding data structures. In my application I will be having several messages and my own type of IDs (Lamport clocks) to go with these messages. I will need to frequently ask for specific messages based on the ID. Hence a dictionary seems a better choice than a list, as I ...