Python-Code

wort = "1234567"
chars = []
numbers = []
mix = []

for e in wort:
    try:
        int(e)
    except:
        chars.append(e)
    else:
        numbers.append(e)

if len(chars) == len(numbers):
    for i in range(0, len(chars)):
        mix += chars[i]
        mix += numbers[i]
    print(mix)
if len(chars) == len(numbers) + 1:
    for i in range(0, len(numbers)):
        mix += chars[i]
        mix += numbers[i]
    mix += chars[len(chars) - 1]
    print(mix)
if len(chars) + 1 == len(numbers):
    for i in range(0, len(chars)):
        mix += numbers[i]
        mix += chars[i]
    mix += numbers[len(numbers) - 1]
    print(mix)

if (len(chars) - len(numbers)) ** 2 >= 4:
    print("nicht möglich")

Python-Code

"""
#358: String abwechselnd neu anordnen
Gegeben ist ein String (Text) bestehend aus Kleinbuchstaben und Ziffern. Ziel ist es diesen String neu anzuordnen,
sodass sich Kleinbuchstaben und Ziffern abwechseln.
"""


def merge_2(f1, f2, kz):
    aus1 = ""
    aus2 = ""
    for i in range(0, len(f1)):
        aus1 += str(f1[i]) + str(f2[i])
        aus2 += str(f2[i]) + str(f1[i])
    if kz == 2:
        print(aus1, "oder", aus2)
    else:
        print(aus1)


def merge_1(inp):
    num = filter(lambda x: x.isdigit(), inp)
    num = (''.join(num))
    alp = filter(lambda x: x.isalpha(), inp)
    alp = (''.join(alp))

    if len(num) == 0 and len(alp) > 0:
        print('""', "da nur Buchstaben")
    elif len(alp) == 0 and len(num) > 0:
        print('""', "da nur Ziffern")
    elif len(num) - len(alp) < -1 or len(num) - len(alp) > 1:
        print('""', "nicht abwechselnd möglich")
    elif len(num) > len(alp):
        merge_2(num, alp + " ", 1)
    elif len(num) < len(alp):
        merge_2(alp, num + " ", 1)
    else:
        merge_2(alp, num, 2)


merge_1("train1234")
merge_1("1234567")
merge_1("abcdefg")
merge_1("abcdef123")
merge_1("abcdef12345678")
merge_1("abcd1234")
merge_1("train123456")

Python-Code

def mix_word(string):
    #1
    number = []                       
    letter = []                    
    for symbol in string:
        if symbol in list("1234567890"):
            number.append(symbol)
        else:
            letter.append(symbol)


    #2
    if max(len(number), len(letter)) - min(len(number), len(letter)) > 1:
        return None


    #3
    if len(number) > len(letter):
        size = [number, letter]
    else:
        size = [letter, number]


    #4
    string = ""
    for symbol in range(len(size[0])):
        string += (size[0][symbol])
        if not len(size[1]) - symbol <= 0:
            string += (size[1][symbol])


    return string
        


"""
The program:

1. It splits the word into numbers and letters
2. searches an error
3. sorts the list by length
4. and mixes it


The variables:

string: is the word, that should to be mixed - later it is the mixed word
number: contains all the numbers of the string
letter: contains letters (also symbols and space) of the string
symbol: goes through the items of the string
size: [0] is the bigger list, [1] is the smaller list
"""