How to Use enumerate() in Python

Code available in comment below! This video shows the basics of how to use enumerate() in Python. enumerate() is useful for looping through data structures like lists while having access to each index and the corresponding value for each iteration of the loop.

characters = ["Krillin","Goku", "Vegeta", "Gohan", "Piccolo"]

# enumerate() returns a sequence of (index, item) tuples

list(enumerate(characters))

# Use enumerate() in a for loop to get an item and its index

for index, character in enumerate(characters):
print(index, character)

# Why might you want to use enumerate?
# Example: store index positions of duplicate items

characters = ["Krillin","Goku", "Goku", "Gohan", "Piccolo",
"Krillin","Goku", "Vegeta", "Gohan", "Piccolo",
"Piccolo","Goku", "Vegeta", "Goku", "Piccolo"]

character_map = {character:[] for character in set(characters)}

print(character_map)

# Use enumerate to store the index for each occurence
for index, character in enumerate(characters):
character_map[character].append(index)

character_map

[DataDaft]

characters = ["Krillin", "Goku", "Vegeta", "Gohan", "Piccolo"]

# enumerate() returns a sequence of (index, item) tuples

list(enumerate(characters))

# Use enumerate() in a for loop to get an item and its index

for index, character in enumerate(characters):
print(index, character)

# Why might you want to use enumerate?
# Example: store index positions of duplicate items

characters = ["Krillin", "Goku", "Goku", "Gohan", "Piccolo",
"Krillin", "Goku", "Vegeta", "Gohan", "Piccolo",
"Piccolo", "Goku", "Vegeta", "Goku", "Piccolo"]

character_map = {character:[] for character in set(characters)}

print(character_map)

# Use enumerate to store the index for each occurence
for index, character in enumerate(characters):


character_map

[malcolmx]

I've been struggling understanding enumerate for a long time, other youtubers never explain what exactly enumerate does or how it works, they just skip right over it and use it, this video explained it perfectly, thank you!

[myyoutubeprofile-cu]

It's funny how python is supposed to be easier than C++ but as soon as you want to start doing something like this, C++ makes so much more sense.

[Ligmamonkey]

the comment "enumerate() returns a sequence of (index, item) tuples" really helped me out, for some reason all the explanations I was checking out didn't tell me what the hell it actually did, just the use cases.

[dr_frankenmiller]

Always wondered what enumerate meant... thank you explaining that clearly. Yeah you're right I'll probly be using that all the time

[yyanooo]

saved my life lol thank you . very straight to the point and concise !

[HARSHRAJ-]

Thank you so much. It was pretty helpful.

[dalton_arcade]

Great explanation and examples. Thank you.

[just_living_]

clean, simple and to the point ❤❤❤❤❤❤

[andreawu]

short and sweet, i love it. thank you so much!!

[hashim]

in 4 minutes summarized what the lecturer has been trying to say in 50 minutes

[villagebakerystudio]

Only video about enumarate() which can be found in youtube. Thank you very much..

[Fanda]

you should lift man, I recommend starting strength, alphadestiny, jason blaha & natural hypertrophy

[aurovindsahoo]

Hi @Datadaft youyr videos are awesome but not well paced in your profile please arrange all in one group and share it like you can make all predefined function of python and keep it in 1 group

[neuvocastezero]

But, isn't the list already "enumerated"? Wouldn't
for x in character:
print(x, character[x])
provide the same information?

[lulprumpt]

man what i typed all this exactly and i get error unhashable type 'list' on the line using append...i googled and none of it makes sense

[sudhansumtripathy]

when I enumerate, how is the character getting mapped, not able to understand this -- character_map[character].append(index), it read the character in characters and saved the items to characters_map, I am stuck at character_map[character], [character ], how is it saving the the list.

[Sam-wlvo]

What's the name of the site he uses?

[ryanmanchikanti]

Could you please explain the term yield and how its used in python