Python combine single string element with multiple string elements

Question

I have two lists:

This one has two elements with strings with delamination ';'.

new_lst = [
    '50% Polyester;50% Polyester;50% Polyester;50% Polioster;50% Poliestere',
    '50% Elastane;50% Elasthanne;50% Elasthan;50% Elastano;50% Elastan'
]

The Second list only has one element with same deliminator ';'

newSpecialComp = [
    'Back:;Dos:;Rockseite:;Parte trasera:;Schiena:'
]

I need to combine the FIRST element from the first list new_lst with the first element of the second list newSpecialComp.

Desired output to be a list with two elements but first being the combination of the two above.:

Final_lst = [
    'Back: 50% Polyester;Dos: 50% Polyester;Rockseite: 50% Polyester;Parte trasera: 50% Polioster;Schiena: 50% Poliestere',
    '50% Elastane;50% Elasthanne;50% Elasthan;50% Elastano;50% Elastan'
]

for i, j in zip(newsetSpecialComp, new_lst):
        elem2 = ';'.join(map(lambda x:i+' '+x,j.split(';')))
        final_lst.append(elem2)
        print('Final_lst :', final_lst)

This is what i tried. The output is close but not ideal:

Final_lst = [
    'Back: 50% Polyester;Back: 50% Polyester;Back: 50% Polyester;Back: 50% Polioster;Back: 50% Poliestere', 
    'Dos: 50% Elastane;Dos: 50% Elasthanne;Dos: 50% Elasthan;Dos: 50% Elastano;Dos: 50% Elastan'
]

Error - Syntactical Remorse · Accepted Answer · 2020-01-14 13:15:02Z

1

I think the notation you are missing to help you solve this is zip():

new_lst = [
    '50% Polyester;50% Polyester;50% Polyester;50% Polioster;50% Poliestere',
    '50% Elastane;50% Elasthanne;50% Elasthan;50% Elastano;50% Elastan'
]
newSpecialComp = [
    'Back:;Dos:;Rockseite:;Parte trasera:;Schiena:'
]

finalList = new_lst.copy()

# Assuming len(newSpecialComp) <= len(new_lst)
for index, val in enumerate(newSpecialComp):
    finalList[index] = ';'.join(' '.join(x) for x in zip(val.split(';'), new_lst[index].split(';')))

print(*finalList, sep='\n')

Output:

Back: 50% Polyester;Dos: 50% Polyester;Rockseite: 50% Polyester;Parte trasera: 50% Polioster;Schiena: 50% Poliestere
50% Elastane;50% Elasthanne;50% Elasthan;50% Elastano;50% Elastan

--- The more Verbose way to write it ---

new_lst = [
    '50% Polyester;50% Polyester;50% Polyester;50% Polioster;50% Poliestere',
    '50% Elastane;50% Elasthanne;50% Elasthan;50% Elastano;50% Elastan'
]
newSpecialComp = [
    'Back:;Dos:;Rockseite:;Parte trasera:;Schiena:'
]

finalList = new_lst.copy()

# Assuming len(newSpecialComp) <= len(new_lst)
for index, val in enumerate(newSpecialComp):
    str1 = val.split(';')
    str2 = new_lst[index].split(';')
    combined_strings = [' '.join(x) for x in zip(str1, str2)]
    finalList[index] = ';'.join(combined_strings)

print(*finalList, sep='\n')

edited Jan 14, 2020 at 13:15

answered Jan 14, 2020 at 13:07

Error - Syntactical Remorse

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2 Comments

babis95 Over a year ago

Thank you so much it works. Could you give a brief explanation of what is happening your code?

Error - Syntactical Remorse Over a year ago

Add prints to str1, str2, and combined_strings in the bottom code block. I could explain it but it would be shorter and probably better if you look at the values as the code runs. If you still don't understand it let me know.

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