Dictionaries unlike lists are not ordered (and do not have the 'sort' attribute). Therefore, you can not rely on getting the items in the same order when first added.
What is ... |
Is it possible to retrieve items from a Python dictionary in the order that they were inserted?
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I have a list of dictionaries like so:
listDict = [{'id':1,'other':2},{'id':3,'other':4},{'id':5,'other':6}]
I want a list of all the ids from the dictionaries. So, from the given list I would get the list:
[1,3,5]
It ... |
Ok, so I have a list of dicts:
[{'name': 'johnny', 'surname': 'smith', 'age': 53},
{'name': 'johnny', 'surname': 'ryan', 'age': 13},
{'name': 'jakob', 'surname': 'smith', 'age': 27},
{'name': 'aaron', 'surname': 'specter', 'age': 22},
...
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I have a list of dicts, something like this:
test_data = [
{ 'offset':0, 'data':1500 },
{ 'offset':1270, 'data':120 },
{ 'offset':2117, 'data':30 ...
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EDIT: Clarified the question a bit
How can I get a string from a dictionary with the format
key1 = value1
key2 = value2
in a relatively fast way ? (relative to plain concatenation)
... |
I have a a wxPython checklist box that returns a list of integers. I want to use the integers to look up items in a dictionary. I am not really sure ... |
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I have the following XML example
<?xml version="1.0"?>
<test>
<items>
<item>item 1</item>
<item>item 2</item>
...
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Is there a way to see how many items in a dictionary share the same value in Python?
Let's say that I have a dictionary like:
{"a": 600, "b": 75, "c": 75, "d": ...
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I am new to Python.
Say I have a list:
list = ['A','B','C','D']
The key for each item respectively here is 0,1,2,3 - right?
Now I am going to loop through it with a for ... |
I need to concatenate string to an existing one as follows.
for k,v in r.iteritems():
tableGenString += "%s %s, " % (k, what_type(v))
The problem is that for the last ... |
I wonder if there is a reasonable easy way to allow for this code (with minor modifications) to work.
class Info(object):
@attr("Version")
def version(self):
...
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When I try and sort my dictionary, I get an error: ''nonetype' object is not iterable.
I am doing:
for k,v in mydict.items().sort():
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i read a lot in that forum, but i couldn't find a proper way to add all items to my dictionary... So maybe someone can help me!
first a explanation:
rows = cur.fetchall() ...
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I'm new to Python and I have a simple question, say I have a list of items:
['apple','red','apple','red','red','pear']
Whats the simpliest way to add the list items to a dictionary and ... |
If I understand correctly, in Python 2, iter(d.keys()) was the same as d.iterkeys(). But now, d.keys() is a view, which is in between the list and the iterator. What's the difference ... |
I have a dictionary with either a integer or a tuple of integers as value. How do I find the maximum integer present in dicts' values?
Example:
x1 = {0:2, 2:1, 3:(1, 2), ...
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I have a relatively large dictionary in Python and would like to be able to not only delete items from it, but actually reclaim the memory back from these deletions in ... |
Here is my code:
trainingSet = {"0,0":0, "1,0":1, "2,0":1, "0,1":0, "1,1":1, "1,2":0, "2,0":0, "2,1":0, "2,2":1}
for k,expectedOutput in trainingSet.iteritems():
print 1
coordinates = k.split(",")
...
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Hi I'm new to python. I am trying to add different key value pairs to a dictionary depending on different if statements like the following:
def getContent(file)
for line ...
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say i have a dict: d = {'Abc':5,'Jack':4,'amy':9,'Tom':0,'abc':5}
If i want to write a function such that if i pass that function to the built-in sort function, eg. list(d).sort(function), the sort function ... |
The task is to define a function count_vowels(text) that takes a string text, counts the
vowels in text (using a Python dictionary for the counting), and returns the
vowel frequency information as a ... |
I have a dictionary like
mydict={
(a,1):0,
(a,2):0,
...
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I have a list li:
[
{name: "Tom", age: 10},
{name: "Mark", age: 5},
{name: "Pam", age: 7}
]
I want to get the index of the item that has a certain name. For example, if I ... |
I have a class called Point which has only x_coordinate and y_coordinate floats as its attributes. I have about 700000 of those Point objects which I would like to store in ... |
Is it legitimate to delete items from a dictionary in Python while iterating over it?
For example:
for k, v in mydict.iteritems():
if k == val:
del ...
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I'm looking to get all values associated with a key in a dictionary. Sometimes the key holds a single dictionary, sometimes a list of dictionaries.
a = {
'shelf':{
...
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I have easy access to a list of variables as such:
[a, b, c,]
I was wondering, can you introspect (or something) on the variable names to get a dict that looks like ... |
l = [
{'bob':'hello','jim':'thanks'},
{'bob':'world','jim':'for'},
{'bob':'hey','jim':'the'},
{'bob':'mundo','jim':'help'}
]
for dict in l:
print dict['jim']
Is there a one liner ... |
This is a very basic snippet adder/viewer/remover. The way I want it to work, the user would enter a name (dictionary key) and then the text body (value of key), to ... |
I have a dictionary with 46,000 key:value pairs where each key has a 3 item list as values:
my dict = {key1: ['A', 'B', 'C'], key2: ['B', 'A', 'G'], key3: ['Z', 'H', ...
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Can we know the position of items in Python's ordered dictionary ?
For example:
If I have dictionary :
// Ordered_dict is OrderedDictionary
Ordered_dict = {"fruit": "banana", "drinks": "water", "animal": "cat"}
Now how to ... |
I have a dictionary in python like this:
x = {country:{city:population}:......}
and I want to create a new dictionary like y = {country:cities_population}, where cities_population adds all the population in every city in ... |
I came across these three types when I used collections.Counter's viewkeys(),viewitems() and viewvalues() method.
The value those three methods returned are of type dict_keys, dict_items and dict_values.
They are iterable, as I have ... |
Suppose you have a list of dictionaries like this one:
a = [ {'name':'pippo', 'age':'5'} , {'name':'pluto', 'age':'7'} ]
What do you to extract from this list only the dict where name==pluto?
To make ... |
I have a dictionary of N items. Their values are strings, but I'm looking for an easy way to detect if they are all empty strings.
{'a': u'', 'b': u'', 'c': u''}
... |
I am reading from a file with data like this:
{"day" :"Monday", "alarm":"on", "kids":"School" , "work":"days"}
{"day" :"Tuesday", "alarm":"on", "kids":"School" , "work":"days"}
{"day" :"Wednesday", "alarm":"on", "kids":"School" , "work":"days"}
{"day" :"Thursday", "alarm":"on", "kids":"School" , "work":"nights"}
{"day" :"Friday", ...
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I want to iterate a dictionary, examine the value and delete items that matches certain values.
Example
d = {1, 1, 2, 1, 4, 5}
for i in d:
...
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Trying to exclude items from a dictionary with an if stateme by stevo Thu Apr 22, 2010 3:41 pm After reading a few books over past few days I decided to redo one of my original projects, with my vastly improved understanding of dictionaries. Cleaned up the code a bit, did some debugging print statements to verify the dictionaries were ... |
>>> dict = { ... 'a' : 0, ... 'b' : { ... 'c' : 1, ... 'd' : { 'e' : 7 } ... } ... } >>> dict {'a': 0, 'b': {'c': 1, 'd': {'e': 7}}} >>> location1 = ['b','d','e'] >>> dic = dict >>> ... |
Your understanding of the .items method for dictionaries is spot on. However, never ever, ever never name a variable the same name as a python builtin type. dict is a builtin python type. Once you overwrite a builtin in type or a builtin function by assigning to that name, strange things will happen. Because you are just beginning python and you ... |
def add_rec(from_value, subject_value): test = {} test['From'] = from_value test['Subject'] = subject_value return test ##----------------------------------------------------- list_test =[] data_list = [ ['modtodd@wi.rr.com', 'Test Subject'], ['hanson@wi.rr.com', 'Test Subject 2'], ['thanson@qisadvisors.com', 'Test Subject 3'] ] for rec in data_list: ... |
It all goes back to the basics of the Python language design: List items have a consecutive index, and are accessed by index. Dictionary items are accessed by their key, so the index of the key doesn't matter. Actually, finding a key in a dictionary is faster than finding an item in a list. |