Can you put strings in a list in python?
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Sometimes, while working with data, we can have a problem in which we need to add elements to a container. The list can contain any type of data type. Let’s discuss certain ways in which we can perform string append operations in the list of integers. Show
Method #1 : Using + operator + list conversion In this method, we first convert the string into a list and then perform the task of append using + operator. Python3
Output The original list : [1, 3, 4, 5] The original string : gfg The list after appending is : [1, 3, 4, 5, 'gfg'] Method #2: Using append() This particular function can be used to perform the operation of appending a string element to the end of a list without changing the state of the string to a list of characters. Python3
Output The original list : [1, 3, 4, 5] The original string : gfg The list after appending is : [1, 3, 4, 5, 'gfg'] Method#3: Using insert() This function is used to insert and add the element at the last of the list by using the length of the list as the index number. Python3
Output The original list : [1, 3, 4, 5] The original string : gfg The list after appending is : [1, 3, 4, 5, 'gfg'] Method#4: Using extend(): This method can be used to solve this problem, extend function is used to merge the one list to the end of second list. We add a string to the end of the list by using extend function. Python3
Output The original list : [1, 3, 4, 5] The original string : gfg The list after appending is : [1, 3, 4, 5, 'gfg'] A list in python is an ordered sequence that can hold a variety of object types, such
as, integer, character or float. A list in python is equivalent to an array in other programming languages. It is represented using square brackets, and a comma(,) is used to separate two objects present in the list. A list and an array in other programming languages differ in the way that an array only stores a similar data type, meaning that an array is homogeneous in nature, but a list in python can store different data types at a time, and therefore it can either be homogeneous or heterogeneous. Below are some examples of homogeneous and heterogeneous lists in python: Homogenous Lists:Heterogeneous Lists:Accessing an Item From the ListAn item from the list can be accessed by referring to its index in the list. The indexing of elements in the list starts from 0. Let’s take an example of the list we created in the last step. To access an element from the list, we pass the index of that element in the print function. As mentioned earlier, that indexing starts from 0, so when index [1] is passed, it gives the result as “dog”. Similarly, if we pass the index, say [2], it will give the output 2.2 What Is a String in Python?A string in python is an ordered sequence of characters. The point to be noted here is that a list is an ordered sequence of object types and a string is an ordered sequence of characters. This is the main difference between the two. A sequence is a data type composed of multiple elements of the same data type, such as integer, float, character, etc. This means that a string is a subset of sequence data type, containing all elements as characters. Here is an example of string in python and how to print it.
For declaring a string, we assign a variable to the string. Here, a is a variable assigned to the string simplilearn. An element of a string can be accessed in the same way as we saw in the case of a list. The indexing of elements in a string also starts from 0. How to Convert a List to String in Python
The join function is one of the simplest methods to convert a list to a string in python. The main point to keep in mind while using this function is that the join function can convert only those lists into string that contains only string as its elements. Refer to the example below. Here, all the elements in the list are individual string, so we can use the join function directly. Note that each element in the new string is delimited with a single space. Now, there may be a case when a list will contain elements of data type other than string. In this case, The join function can not be used directly. For a case like this, str() function will first be used to convert the other data type into a string and then further, the join function will be applied. Refer to the example given below to understand clearly.
In this example, firstly we declare a list that has to be converted to a string. Then an empty string has to be initialized to store the elements. After that, each element of the list is traversed using a for loop, and for every index, the element would be added to the initialized string. At the end, the string will be printed using the print() function.
The map function can be used in 2 cases to convert a list to a string.
The map() function will accept 2 arguments;
At the end, the join() function is used to combine all the values returned by the str() function.
List comprehension in python generates a list of elements from an existing list. It then employs the for loop to traverse the iterable objects in an element-wise pattern. To convert a list to a string, use Python List Comprehension and the join() function. The list comprehension will traverse the elements one by one, and the join() method will concatenate the list's elements into a new string and return it as output. An example of conversion of list to string using list comprehension is given below.
In this method, Assign a list and traverse each element and add each into an empty string using for loop The code in python is as given below instr= ['Hello', 'How', 'are', 'you', 'doing?'] emptystr = "" # passing in a string for i in instr: emptystr += i +'' print(emptystr) The output will be - Hello How are you doing?
# listToString is a function def listToString(instr): # initialize empty string emptystr="" # string traversal using for loop for ele in instr: emptystr += ele instr = ['Hello', 'How', 'are', 'you', 'doing?'] print(listToString(instr)) The output will be - Hello How are you doing? The article explains two of the data types List,and String in Python language and some ways of converting List to String in Python programming language. All methods have code that has readability and functions that are used often to convert List into String. It is important to understand each of the functions and its use, the syntax used and the developer should have hands-on experience with the expected effect on output using these functions. In all these methods iteration is used to move from one element to the next element in a list and then add each of the elements and convert them as a single string. In case you wish to master the A to Z of Python, enroll in our Python Certification Training today! And in case you have any questions regarding the tutorial, drop a comment below and our experts will help you out. Can strings be in lists Python?Lists are one of the most common data structures in Python, and they are often used to hold strings.
Can a list have string?Lists are similar to strings, which are ordered collections of characters, except that the elements of a list can have any type and for any one list, the items can be of different types. There are several ways to create a new list.
Can we add string and list in Python?You can concatenate a list of strings into a single string with the string method, join() . Call the join() method from 'String to insert' and pass [List of strings] . If you use an empty string '' , [List of strings] is simply concatenated, and if you use a comma , , it makes a comma-delimited string.
How do I add multiple strings to a list in Python?We can do this in many ways.. append() We can append values to the end of the list. We use the append() method for this. ... . insert() You can insert values in a list with the insert() method. Here, you specify a value to insert at a specific position. ... . extend() extend() can add multiple items to a list. Learn by example:. |
