Dict « tuple « Python Data Type Q&A

1. tuple list from dict in python    stackoverflow.com

How can I obtain a list of key-value tuples from a dict in python? Thanks

2. Python : List of dict, if exists increment a dict value, if not append a new dict    stackoverflow.com

I would like do something like that.

list_of_urls = ['http://www.google.fr/', 'http://www.google.fr/', 
                'http://www.google.cn/', 'http://www.google.com/', 
   ...

3. Python: Access dictionary value inside of tuple and sort quickly by dict value    stackoverflow.com

I know that wasn't clear. Here's what I'm doing specifically. I have my list of dictionaries here: dict = [{int=0, value=A}, {int=1, value=B}, ... n] and I want to take them in ...

4. Concatenate tuples in empty dict    stackoverflow.com

errors = {}

#errorexample
errors['id'] += ('error1',)
errors['id'] += ('error2',)

#works but ugly
errors['id'] = ('error1',)
errors['id'] += ('error2',)

5. Transform tuple to dict    stackoverflow.com

How can I transform tuple like this:

(
    ('a', 1),
    ('b', 2)
)

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

6. python tuple to dict    stackoverflow.com

For the tuple, t = ((1, 'a'),(2, 'b')) dict(t) returns {1: 'a', 2: 'b'} Is there a good way to get {'a': 1, 'b': 2} (keys and vals swapped)? I'm wanting to be able ...

7. How to dump/append all the values of a dict into a list if key is a tuple?    stackoverflow.com

I have a dict as follows with unit names and testnames in a list:

dictA = {('unit1', 'test1'): 10,  ('unit2', 'test1'): 78,  ('unit2', 'test2'): 2, ('unit1', 'test2'): 45}  
units ...

8. Creating a dict from list of key, value tuples while maintaining duplicate keys    stackoverflow.com

So I've got a comprehension to the effect of:

dict((x.key, x.value) for x in y)

9. Why can't I use a list as a dict key in python?    stackoverflow.com

I'm a bit confused about what can/can't be used as a key for a python dict.

dicked = {}
dicked[None] = 'foo'     # None ok
dicked[(1,3)] = 'baz' ...

10. Create a table. Dict, list, tuple? Confused.    python-forum.org

Hey there, I'm trying to teach myself Python, and in the process I'm trying to create a matrix/table sort of set of values. I thought a dictionary was exactly what I needed. Then when I tried to make it, I realised I'd need something like a dictionary of dictionaries of dictionaries. Then I tried a list. I got very confused, and ...