Do you know how to use enumerate in Python? Have you ever thought about the process of enumerating in Python? Let’s experience what is enumerated in Python.
But before we start the programming journey, let’s know what is meaning of enumerate is.
Enumerate meaning is to count anything. This is the simple meaning of the word enumerate. But the deeper definition of the word is to count & produce it one by one. Let’s take an example:
Suppose, you are provided a bag of apples. Now, you have asked to enumerate the apples. This means you have to draw out the apples one by one from the bag. As well as you have to produce it. Also, you need to have a count of it.
Now, think about a situation.
If the number of apples is less than five or ten numbers of apples are present in the bag. It will be quite easy task for it but if the number is fifty or hundred? Then, the task will not be so easy.
The same thing goes for Python language also. Now, let’s think about a situation from a programming aspect.
Suppose, in a competitive programming exam, a question is provided to you. You are asked to write a code that can provide you with the number of alphabets present in a string. Also, you are provided a time limit to do that. This means you have to do it by using time complexity theory also.
So, there is no way to run a for a loop & count the alphabets there. Also, if the string is quite long like this “ilovecodingzapplatformmuchasitprovidesanicetutorialplatformforus”. Then it will a problem to find out the number of alphabet present there. As efficiency is also a matter to get selected.
So, what will you do in such cases?
So, in such cases, you need to use enumerate function in Python. This will be a matter of a minute to get the answer to such questions.
But wait, is there any way to get rid of such situations? Yes! There are.
What is Enumerate in Python? Know More
Enumerate is an inbuilt function of Python. This function in Python helps to get rid of such situations. Enumerate function in Python can apply to the structures which are enumerated only. This means it applies to the String or List-like structures.
As String or List have numbers of elements present there. These elements are countable. That is why enumeration in Python can apply to those areas only. Generally, it will take a single line to generate the count of the elements. As well as it will distribute the elements with the numbers. This will help to easily find out the elements in a big string.
General Syntax: enumerate(name, starting-value)
Here, we have to provide the name of the structure. Like we have to provide the name of the String, we need to enumerate. In the case of List, we have to provide the List name there.
The Starting-Value is from where you need to start the count. The default value is zero. This means, that if you don’t provide the value there, the counting will start from zero. Then it will go like 0, 1, 2, 3…
In case you need to provide any number there, it will start from there. If you provided starting value as 1, then the counting goes like 1, 2, 3, 4…
In the case of List & String enumerate will provide the output as another List. Then if needed you have to remove the brackets from both sides of the List.
How to Use Enumerate in Python? Read Below
There are mainly two types of methods to use enumerate in Python. Otherwise, there is no way to use such things in Python. Let’s make a list of those methods:
- Using Simple Enumerate Syntax
- Using Enumerate Syntax & Loop
Of these, the first one is the most commonly used method. This method is applicable for both Lists & Strings. But the loop method is only applicable to the List method only.
The second method is quite long. It is advisable to use only the first method. As it will save the time of the program. It will efficiently help the time complexity of the program.
Let’s look at the method one by one.
How to Use Enumerate in Python Using Simple Enumerate Syntax:
Here first we have to declare a List in Python. As well as we have to provide the elements there. Then we have to do operations on it.
Then we have to convert the enumerated things to the List structure. If we do0 not convert it into the List structure it will provide a weird structured output. Hence, it will a problem.
First, we try to provide the output with the default starting value which is zero. This printing & conversation can be done in a single line.
General Syntax: list(enumerate(list-name))
Then we will try to enumerate the List from a programmer-specific output. Suppose, we try to enumerate this thing from 100. Then we need to provide the starting number as 100.
General Syntax: list(enumerate(list-name, 100))
Example:
# Declaring The List
sub = ['Bengali', 'English', 'Math']
# Printing Enumerate Counting From Zero
print("Enumerate Form Counting Zero: ")
print(list(enumerate(sub)))
# Printing Enumerate Counting From 100
print("Enumerate Form Counting 100: ")
print(list(enumerate(sub,100)))
Let’s look at the output of the above code. Hence, we come to know how to use enumerate in Python.
Output:
Now, we will look into the procedure for the String.
For this case, we need to declare a string there. We also have to provide value there. Then we will try to do the same case for String also. Here, in this case, also the syntax will be the same. But in place of the List name, we have to provide the String name there.
General Syntax: list(enumerate(string-name))
Example:
# Declaring The String
name = 'Codingzap'
# Printing Enumerate Counting From Zero
print("Enumerate Form Counting Zero: ")
print(list(enumerate(name)))
Let’s look at the output of the above code. Hence, we come to know how to use enumerate in Python.
Output:
How to Use Enumerate in Python Using Simple Enumerate Syntax & Loop:
In such cases, we have to declare a List. As well as we have to provide the values there. Then using a for loop we have to run the List in the enumerate function. This will provide enumerated output in every single line. Here the brackets will also be available at every end of the data.
If the programmer needs the output without the brackets, then they have to follow the next method. There we have run a count number that will run with them for a loop. Hence it will provide the output without brackets.
Also, there is a way to start counting from the new value. The approach for that will also same as the previous methods.
Example:
# Declaring The List
sub = ['Bengali', 'English', 'Math']
# Normal Way To Print Enumerate In Loop
print("Normally Print Using Loop: ")
for topic in enumerate(sub):
print(topic)
# Way To Print Enumerate Without Brackets
print("Printing Without Brackets: ")
for num, topic in enumerate(sub):
print(num, topic)
# Changing Default Start Value And Printing
print("Printing From Another Start Value: ")
for num, topic in enumerate(sub, 5):
print(num, topic)
Let’s look at the output of the above code. Hence, we come to know how to use enumerate in Python.
Output:
Conclusion:
As we saw the enumeration in Python is very important to use.
It reduces the workload related to the fields of String & List.
It counts & produces the elements in the List easily.
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