Question

I need help with this python programming assignment

For this task you're going to write a function that joins strings from a list. The function called join ) has one formal parameter and one optional parameter. Recall that an optional parameter is like end or sep in the print( function. You don't have to use it because there's a default value. For the print () function, e.g., \'n' (newline) is the default value for end. The formal parameter is alist whose elements are strings. The optional parameter sep has a default value of a single blank space (i.e.. seprecall that a blank space is a string). join) returns a single string consisting of the concatenation of all the elements in the 1list, each separated by sep: >>> title = [, Spider-Man: , , , Into, , Spider-Man Into The Spider-verse Spider-Man: IntoTheSpider-verse" , The, , , Spider-Verse' ] 2 >>> join(title) # Use default value of sep 4 >>> join (titie, sep-,,) # sep is an empty string >>join (title, '-') 7 Spider-Man:--Into-*-The-Spider-verse" aracters >>>name- 'Interstellar1 9 >>> join (name) 0 Interstellar " >>> join (name, sep-"-+-") # It still works 12 Interstellar # Make sure it works with a one-element list In this code the list title defined in line I has four string elements. When this list is passed as the argument of join) in line 2, the return value is a single string with the default value of sep (blank space) separating the elements of the original list. In line 4 we override the default value of sep by setting it to an empty string with the result shown in line 5. In line 6 the join) function is called with the separator -*-. We don't have to use sep- explicitly if we put it in the proper place relative to the function definition. Line 7 shows the resulting string. In line 8 a list is created with a single string. Lines 9 through 12 show that the join () function behaves properly for this one-element list. You'll have to think a bit about how to define join) so that the separator isn't added to the last element! Think about how to implement join) and give it a try before looking at the hints that follow. Use the IDLE Shell window for this work. Hints: . You have to initialize an accumulator to an empty string before using a for-loop. . Recall how to concatenate strings. All you have to do is add them together-e.g. Ho+ 'Ho 'Ho' creates the string Ho Ho Ho' . range (len (listname) will return a list of integers as long as the list. What does range (len (1istname)-1 return? . Recall that the final item in a list can be accessed using the index [-1] . Add the last element of the list outside the for-loop

please double check the indentations

Answer 1

PYTHON PROGRAM:

def join(lst,sep=' '):
accumulator=''
if len(lst)==1:
accumulator=lst[0]
return accumulator
else:
for i in range(1,len(lst)-1):
accumulator=accumulator+sep+lst[i]
accumulator=lst[0]+accumulator+sep+lst[-1]
return accumulator

title=['Spider-Man:','Into','The','Spider-Verse']
print(join(title))
print(join(title,sep=''))
print(join(title,sep='-*-'))
print()
name=['Insteller']
print(join(name))
print(join(name,sep="-*-"))
print()
title=['Love','is','in','the','air']
print(join(title))
print(join(title,sep=''))
print(join(title,sep='-*-'))

INDENTATIONS:

def join(1st,sep- accumulator-' if len(1st)--1: accumulator-lst[e] return accumulator for i in range (1,len(1st)-1): accumulator-lst[e]+accumulator+sep 1st0-1] else: accumulator-accumulator sep 1st[i] return accumulator title-Г Spider-Man: . , . Into . , . The . , ' Spider-Verse . ] print (join(title)) print (join(title,sep- ')) print(join(title,sep--*-)) print() name-I'Insteller'] print(join(name)) print (join(name, sep-"-*-")) print() title-['Love', 'is', 'in', 'the, 'air'] print (join(title)) print (join(title,sep- ')) print(join(title,sep--*-))

OUTPUT:

Spider-Man: Into The Spider-Verse Spider-Man: IntoTheSpider-Verse Spider-Man: -*-Into-*-The-*-Spider-Verse Insteller Insteller Love is in the air Loveisintheair Love-*-is-*-in-*-the-*-air