I'm a beginner in python and I'm stuck on a task I need to complete. I need to define a function that returns a list in a given range in which every time the number 7 appears or the number % 7 == 0 (no remainder), it is replaced with the word 'BOOM', otherwise the number returns the same. is needs to be done using the 'for' loop.

its supposed to look like this:

print(seven_boom(17))
['BOOM', 1, 2, 3, 4, 5, 6, 'BOOM', 8, 9, 10, 11, 12, 13, 'BOOM', 15, 16, 'BOOM']
print(seven_boom(17))

this is what ive tried and i have no idea what to do (end_number is the end of the range in the list but it needs to be included):

def seven_boom(end_number):
 list = [range(0, end_number   1)]
 for i in list:
   if i % 7 == 0 or i[0:] == 7:
     i =1
     return list.replace(7, 'BOOM')

CodePudding user response：

Something like this should work:

end_number = 18
def seven_boom(end_number):
    List = range(0, end_number   1)
    boomList = ["BOOM" if (x%7 == 0) or ("7" in str(x)) else x for x in List ]
    return boomList

CodePudding user response：

I think this can answer your question.

 listEx= [x for x in range (1,20)] ## creates a list using ints from 1 to 19


def changeList(listex): # get a list as a parameter
text = 'boom' # you can change the text its the element to implement if condition meets
listnew = [item if item % 7 !=  0 and '7' not in str(item) else text for item in listex ] # checks if number is divisible by 7 and changes the appending element
return listnew # return the changed list

it can be done simpler and cleaner but for now it should be enough. Also check list comprehensions in python List Comprehension

CodePudding user response：

Simply:

1. creates a list in the range
2. loop through the list values
3. check if 7 appears in the value or if it divisible by 7
4. If true, update the list value
5. return updated list

def seven_boom(end_number):
     #creates a list
     created_list = [x for x in range(end_number 1)]
      #loop through the list values
     for i, v in enumerate(created_list):
           #check if 7 in value or value divisible by 7
           if v % 7 == 0 or '7' in str(v):
                #update the list value
               created_list[i] = 'boom'
     #return updated list
     return created_list

CodePudding user response：

I'm sure someone will edit it but next time use the curly brackets to make code easy to read. Also don't use "list" as a variable name as it is a keyword in Python. List will convert your data into a list form. I don't think leaving range in the square brackets is a good idea.

word = []
def seven_boom(end_number):
    numbers = list(range(0, end_number   1))

    for i in numbers:
        if i % 7 ==0 or '7' in str(i):
            word.append("BOOM")
        else:
            word.append(i)
    return word