pyOOP-Class-Methods

# This is my first solution to writing a class for counting vowels in a string
# A second solution follows this one, and is perhaps neater / more efficient

# Please bear in mind that this is the first time I have ever attempted to write class methods LOL

class UserMainCode(object):
    @classmethod
    def countvowels(cls, vowels, in1):
   # write code after this line only
        count = 0
        for char in in1:
            if char in vowels:
                count += 1
        return count

    def __init__(self):
        pass                    # no parameters are passed when initialising the method, so we only need "pass" here


obj = UserMainCode()            # Create an instance of the class, passing no parameters


allvowels = 'aeiou'
input1 = 'fggsartuioio'

# Call the vowel counting method, passing it the vowel string, and the string to be analysed
vowel_count = obj.countvowels(allvowels, input1)
print(vowel_count)

#------------------------------------------------
# Here is my second and possibly better solution

class UserMainCode(object):
    @classmethod
    def countvowels(cls, in1):
   # write code after this line only
        count = 0
        for char in in1:
            if char in cls.vowels:      # the class already knows what vowels are
                count += 1
        return count

    @classmethod                    # here we define a second class method
    def __init__(cls, vowels):      # the object instantiation defines the set of vowels
        cls.vowels = vowels         # create a class attribute that defines what vowels are

allvowels = 'aeiou'
myobject = UserMainCode(allvowels)       # Make an instance of the class, telling it the vowels

input1 = 'fggsartuioio'
vowel_count = myobject.countvowels(input1)  # Call the class counting method, passing just the string to analyse
                                            # We only need to pass the string to be counted
                                            # as the class already knows what vowels are

print(vowel_count)

# output
# 6