The map() function
Let's do some mapping!
Do you remember how zip()
works? It merges given Iterables so that items with the same index fall into the same tuple. Moreover, the output is restricted by the shortest Iterable.
Your task is to define your own my_zip()
function with *args
depicting a variable number of Iterables, e.g. lists, strings, tuples etc. Rather than a zip
object, my_zip()
should already return a list of tuples.
Comment: args
should be checked whether they contain Iterables first. But we omit it for simplicity.
This exercise is part of the course
Practicing Coding Interview Questions in Python
Exercise instructions
- Retrieve Iterable
lengths
fromargs
usingmap()
and find the minimal length. - Within the loop, create the
mapping
usingmap()
to retrieve the elements inargs
with the same indexi
. - Convert the mapping to a tuple and append it to the
tuple_list
.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
def my_zip(*args):
# Retrieve Iterable lengths and find the minimal length
lengths = list(map(____, ____))
min_length = ____
tuple_list = []
for i in range(0, min_length):
# Map the elements in args with the same index i
mapping = map(____, args)
# Convert the mapping and append it to tuple_list
tuple_list.append(____(____))
return tuple_list
result = my_zip([1, 2, 3], ['a', 'b', 'c', 'd'], 'DataCamp')
print(result)