CODEWITHSUNDEEP
python
steveeweeveewoo
steveeweeveewoo

Reputation: 99

Changing duplicate values in python

I have a dictionary of lists of numbers, e.g.:

tDict = {1:[400,200,400,100,0],2:[100,200,300,400,400],3:[200,200,200,100,100]}

I am not allowed to have duplicate values in the lists so my strategy is to iterate through and replace duplicate values with incremented values. This would produce:

{1:[400,200,401,100,0],2:[100,200,300,400,401],3:[200,201,202,100,101]

I have tried multiple combinations of counters etc to achieve this:

for k,v in tdict.items():
    for x in range(len(v)):
        for y in range(len(v):
            if v[x]==v[y] and y!0
                v[y]+=1

etc. (Im pretty new to python as you can probably guess). Any help would be greatly appreciated.

Upvotes: 1

Views: 84

Answers (2)

Moses Koledoye
Moses Koledoye

Reputation: 78546

Here's one way to do it with itertools.count building a new dict from each of the lists and then incrementing the count object when a new instance of an integer is found. The current count is then added to the number:

from itertools import count

for k, v in tDict.items():
   d = {k: count() for k in v}
   tDict[k] = [x+next(d[x]) for x in v]

print tDict
# {1: [400, 200, 401, 100, 0], 
#  2: [100, 200, 300, 400, 401], 
#  3: [200, 201, 202, 100, 101]}

Upvotes: 3

Dhruv Aggarwal
Dhruv Aggarwal

Reputation: 177

Try This:

for k, v in tDict.iteritems():
   new_list = []
   for item in v:
       while item in new_list:
           item += 1
       new_list.append(item)
   tDict[k] = new_list

Upvotes: 0

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