CODEWITHSUNDEEP
pythonlistdictionaryironpython
Geoffry Trill
Geoffry Trill

Reputation: 19

Search in a list for characters

I have done a large amount of searching but cannot find what I am after. I am using Iron Python.

I have a large list of strings (MyList) that I have extracted and I would like to see if there are values that contain the Items in the SearchStrings Dictionary. The searchStrings Dictionary could have over 500 items within.

MyList = ["123steel","MylistConcrete","Nothinginhere","45","56","steel","CONCRETE"]
SearchStrings = {'concrete' : 'C','CONCRETE' : 'C','Steel' : 'S', 'STEEL' : 'S'}

I need to return the index and then matching code from the SearchString.

i.e If we find 'MylistConcrete' i will know the index '1' and can return 'C'

I hope this makes sense to everyone. Let me know if you need any clarification

Thanks in Advance,

Geoff.

Upvotes: 0

Views: 75

Answers (3)

Simas Joneliunas
Simas Joneliunas

Reputation: 3138

First of all, I'd suggest you to use string.lower() to eliminate case dependencies in the search. This will make your dictionary smaller and more manageable.

Then you can use a simple map function to create a new array with your values while preserving the index (or alter the original should you require that).

MyList = ["123steel","MylistConcrete","Nothinginhere","45","56","steel","CONCRETE"]
SearchStrings = {'concrete' : 'C', 'steel' : 'S'}

def check_search_strings(x):
    for k, v in SearchStrings.items():
        if k in x.lower():
            return v
    return None

indexes = list(map(check_search_strings, MyList))

print (indexes)

Upvotes: 2

lenik
lenik

Reputation: 23556

for m in MyList :
    for k in SearchStrings :
        if k.lower() in m.lower() :
            print 'found', k, 'in', m, 'result', SearchStrings[k]

Upvotes: 1

ascripter
ascripter

Reputation: 6223

Iterate over your items in MyList and check for every item (lowercase) if any of the dict's (lowercase) keys is in it. Then replace. This assumes that you don't have different values for identical words as keys (except for lower- / uppercase difference)

my_list = ["123steel", "MylistConcrete", "Nothinginhere", "45", "56", "steel", "CONCRETE"]
search_strings = {'concrete': 'C', 'CONCRETE': 'C', 'Steel': 'S', 'STEEL': 'S'}

for i in range(len(my_list)):
    for k, v in search_strings.items():
        if k.lower() in my_list[i].lower():
            my_list[i] = v
            break   # avoids completing the loop if first item is found
print(my_list)

The result is

['S', 'C', 'Nothinginhere', '45', '56', 'S', 'C']

Upvotes: 1

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