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Python omits some entries while itereting over dictionary, why?


Python omits some entries while itereting over dictionary, why?

By : lestat
Date : November 21 2020, 09:01 AM
wish help you to fix your issue If you only have 7 results, you must have duplicate keys in your data. You can easily verify how many unique keys you have with this:
code :
print(len(set(config_list)))


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Python Dictionary of classes appending values assigns to all dictionary entries

Python Dictionary of classes appending values assigns to all dictionary entries


By : Manuel Mejia
Date : March 29 2020, 07:55 AM
this one helps. These lists are created once, on class definition, and therefore are shared by all instances. You wanted:
code :
class Reaction:
    def __init__(self, bkm_id, ec_nums=None, b_ids=None, k_ids=None, m_ids=None, source = '')
        self.bkm_id = bkm_id
        self.ec_nums = ec_nums
        self.b_ids = b_ids or []
        self.k_ids = k_ids or []
        self.m_ids = m_ids or []
        self.source = source

        self.substrates = []
        self.products = []

    def add_metabolite(self, metabolite, stoichiometry, subs_prod):
        if subs_prod == 'S':
            self.substrates.append(Substrate_Product(metabolite, stoichiometry))
        elif subs_prod == 'P':
            self.products.append(Substrate_Product(metabolite, stoichiometry)) 
Creating dictionary from list in Python - dict key omits Identical items in the list

Creating dictionary from list in Python - dict key omits Identical items in the list


By : OG Seven
Date : March 29 2020, 07:55 AM
this one helps. You can't use a dictionary comprehension for this, that can't know about preceding keys already being present.
You'll have to use a straight-up loop. Add all values to a list, not just the repeating ones. Don't mix structures here, that'll only create more headaches later on. If you don't you'll have to detect if you have a nested list or a flat list with one fruit and price later on.
code :
my_dict = {}
for fruit, price, origin in lst1:
    my_dict.setdefault(origin, []).append([fruit, price])
from collections import defaultdict

my_dict = defaultdict(list)
for fruit, price, origin in lst1:
    my_dict[origin].append([fruit, price])
>>> my_dict = {}
>>> for fruit, price, origin in lst1:
...     my_dict.setdefault(origin, []).append([fruit, price])
...
>>> my_dict
{'Swiss': [['Apple', 20.0], ['Strawberry', 25.0]], 'Brazil': [['Banana', 5.0]], 'Greece': [['Pear', 12.0]], 'Peru': [['Mango', 3.0], ['Avacado', 7.0]]}
>>> from collections import defaultdict
>>> my_dict = defaultdict(list)
>>> for fruit, price, origin in lst1:
...     my_dict[origin].append([fruit, price])
...
>>> my_dict
defaultdict(<class 'list'>, {'Swiss': [['Apple', 20.0], ['Strawberry', 25.0]], 'Brazil': [['Banana', 5.0]], 'Greece': [['Pear', 12.0]], 'Peru': [['Mango', 3.0], ['Avacado', 7.0]]})
Combine dictionary entries into new dictionary entry based on similar keys with python

Combine dictionary entries into new dictionary entry based on similar keys with python


By : Matthew Thode
Date : March 29 2020, 07:55 AM
I wish this helpful for you I've got the following dictionaries: , You can use itertools.groupby:
code :
import itertools
d = [{'grade': '7', 'current_student_sum': 1559}, {'grade': '8', 'current_student_sum': 1638}, {'grade': 'KF', 'current_student_sum': 1588},{'grade': 'KA', 'current_student_sum': 1588}, {'grade': 'PA', 'current_student_sum': 366}, {'grade': 'PF', 'current_student_sum': 54}, {'grade': 'PP', 'current_student_sum': 384}]
new_d = [[a, list(b)] for a, b in itertools.groupby(sorted(d, key=lambda x:x['grade'][0]), key=lambda x:x['grade'][0])]
final_grade = [{'grade':a, 'current_student_sum':sum(i['current_student_sum'] for i in b)} for a, b in new_d]
[{'grade': '7', 'current_student_sum': 1559}, 
 {'grade': '8', 'current_student_sum': 1638}, 
 {'grade': 'K', 'current_student_sum': 3176}, 
 {'grade': 'P', 'current_student_sum': 804}]
Python script struck while creating dictionary as for each key of dictionary , there are multiple values( 300 entries) l

Python script struck while creating dictionary as for each key of dictionary , there are multiple values( 300 entries) l


By : boreas
Date : March 29 2020, 07:55 AM
wish helps you I am a beginner. I have written a script which take input list of 10 million entries (in the form of a:b where a and b are alphanumeric). , I suspect the problem is here:
Top n entries of a dictionary in python

Top n entries of a dictionary in python


By : Vitaliy
Date : March 29 2020, 07:55 AM
Any of those help Hi guys i have a dictionary that looks like this:
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