How to convert list to string python
How to convert list to string python
How to Convert Python List to String – Definitive Guide
Python Lists are used to store multiple items in one variable. Lists are ordered, and changeable and it also allows duplicate values.
You can convert the python list to String using the String join() method.
Lists can also hold values of different data types. For example, a list can contain both String and Integer values.
With this list of values, you may need to convert Python list to string for printing or any other usage in your program.
If You’re in Hurry…
You can convert python list to String using the join() method as shown below.
Output
If You Want to Understand Details, Read on…
In this tutorial, you’ll learn the different methods available to convert items in a list to a single string in Python.
Table of Contents
Using For Loop
In this section, you’ll learn how to convert a list to a string using for loop.
Example
Output
In the below subsections, you’ll see how you can use the separators.
List to String With comma separated
In this example, you’ll learn how to convert a list to a string with commas.
The function accepts a delimiter character which can be used as a separator.
This method will concatenate the separator at the end of the last string object as well. You can use the slice operator [] to slice out the separator at the end of the concatenated String.
Example
Output
This is how you can concatenate a list as a string with a separator.
Using Join() Method
In this section, you’ll learn how to convert list to string using join() method.
Join method takes all the items from an iterable and joins them into one String object. You can pass the list with the string objects to the Join() method and it’ll return a list.
Snippet
Join() method joins the String with the passed delimiter character.
Example
Output
This is how you can use the join() method.
Next, you’ll see how to use the list comprehension method.
Using List Comprehension
In this section, you’ll learn how to convert a list to a string using list comprehension.
List comprehension allows you to create a new list based on the values of an existing list based on a specific condition.
Basically, it iterates the list and each element will be converted into a String and joined into a single string.
Snippet
Example
Output
This is how you can convert list to String using List comprehension.
Using Map() Method
In this section, you’ll learn how to convert list to string using map().
Map executes a specified function to each item in an iterable.
Basically, it iterates the list and each element will be sent to the function as an input parameter.
In this method, each item in the list will be passed to the join() function which will join the list items into a String object.
Snippet
Example
Output
This is how you can convert python list to String using the map() function.
Next, you’ll use the str() function.
Using str() Method
In this section, you’ll learn how to convert list to String using the str() method.
Output
In this, you can convert list to String by removing brackets. For removing brackets, you can strip() the brackets [ ] from the String object that is created.
Conclusion
To summarize, converting python List to String is one of the commonly used functionality.
You’ve learned how to convert python list to string with different delimiters and a multiline String or a Tab-separated String.
Using the JOIN() method is the recommended method to convert the List to String. Because the other methods also use the join() to concatenate the different items into one string.
If you’ve any feedback, feel free to comment below.
Python List to String
In this tutorial, we’ll Python list to string conversion. A Python list serves the purpose of representing elements for manipulation. It basically represents a collection of homogeneous elements.
Python String also serves the purpose of the collection of elements in the form of characters as input.
The elements of the List can be converted to a String by either of the following methods:
1. Python List to String Using join() Method
Python join() method can be used to convert a List to String in Python.
The join() method accepts iterables as a parameter, such as Lists, Tuples, String, etc. Further, it returns a new string that contains the elements concatenated from the iterable as an argument.
Note: The mandatory condition for join() method is that the passed iterable should contain string elements. If the iterable contains an integer, it raises a TypeError exception.
Syntax:
Example:
In the above example, the join() method accepts the inp_list as a parameter and concatenates the elements of the list to the out_str and thus returns a string as output.
Output:
2. List Comprehension along with the join() method to convert Python List to String
Python List Comprehension creates a list of elements from an existing list. It further uses the for loop to traverse the items of the iterable in an element-wise pattern.
Python List Comprehension along with join() method can be used to convert a list to a string. The list comprehension will traverse the elements element-wise and the join() method would concatenate the elements of the list to a new string and represent it as output.
Example:
Output:
3. Python List to String conversion with map() function
Python’s map() function can be used to convert a list to a string.
The map() function accepts the function and iterable objects such as lists, tuples, string, etc. Taking it ahead, the map() function maps the elements of the iterable with the function provided.
Syntax:
Example:
In the above snippet of code, map(str, inp_list) function accepts str function and inp_list as arguments. It maps every element of the input iterable( list) to the given function and returns the list of elements. Further, join() method is used to set the output into string form.
Output:
4. Iteration using for loop to convert Python List to String
In this technique, elements of the input list are iterated one by one and are added to a new empty string. Thus, converting a list to a string.
Example:
Output:
Conversion of List of characters to a string
Even a set of characters in the form of a list can be converted to a string in the same manner as above. Here is an example to demonstrate the conversion of a list of characters to a string.
Example:
Output:
Conclusion
Thus, in this article, we have studied the different techniques and methods of conversion of Python List to String.
How to convert list to string in Python
In this Python tutorial, we will discuss how to convert a list to a string in python. Also, we will discuss:
Python convert list to string
The Python join() method is used for converting a list into string easily.
Example:
After writing the above code (Python convert list to string), Ones you will print ” value ” then the output will appear as a “ California Chicago Houston”. Here, the “.join “ will convert the list to string. You can refer to the below screenshot for creating a python convert list to string.
We can also convert the list to string using list comprehension method in python.
Example:
After writing the above code (Python convert list to string), Ones you will print ” value ” then the output will appear as a “ California Chicago Houston ”. Here, the “.join([str(element) for element in place]) “ will convert the list to string. You can refer to the below screenshot for creating a python convert list to string.
In this way, we can convert a list to a string in Python.
Convert string to list in Python
To convert a string to list in Python, we have the split() method which is used to separate the string in python.
Example:
After writing the above code (convert string to list in Python), Ones you will print ” split() “ then the output will appear as a “[‘New’, ‘to’, ‘Python’] ”. Here, the “split()” method will convert the string to list separated with commas. You can refer to the below screenshot for creating a python convert string to list.
In this way, we can convert string to a list in Python.
Remove character from string Python
We can use string replace() function to remove a character from the given string in python, it will remove the particular mention character from the string and the result will be a new string without the specified character.
Example:
After writing the above code (remove a character from string Python), Ones you will print ” replace(‘o’) “ then the error will appear as a “ replace takes at least 2 arguments (1 given) ”. Here, the ” replace()” will remove the character from the string but it needs two arguments otherwise it will give an error message. You can refer to the below screenshot to remove a character from string Python.
The above error can be resolved by giving the two arguments to replace(). You can see the below code.
Example:
You can refer to the below screenshot to remove a character from string Python.
In this way, we can remove characters from a string in Python.
Python capitalize the first letter of string
The python has a built-in capitalize() method which is used to return the first character of a string in the upper case.
Example:
After writing the above code (python capitalize the first letter of string), Ones you will print ” s “ then the output will appear as a “ Welcome to python ”. Here, the “capitalize()” method will return the string first character in upper case. You can refer to the below screenshot for python capitalize the first letter of string.
This is how in Python, we can capitalize the first letter of a string.
Python string to lowercase
In python, the string lowercase() method will convert all uppercase characters of a string to the lowercase characters.
Example:
After writing the above code (python string to lowercase), Ones you will print ” s “ then the output will appear as a “ python is interesting ”. Here, the ” lower() “ method will return all the characters in lowercase. You can refer to the below screenshot for python string to lowercase.
This is how we can convert a string to a lowercase in Python.
Length of string in python
In python, we can use the built-in len() method to get the length of string in Python and this will return an integer value as a length of the string.
Example:
After writing the above code (Length of string in python), Ones you will print ” len(msg) “ then the output will appear as a “ 32 ”. Here, the ” len() “ method will return the length of the string. You can refer to the below screenshot for the length of string in python.
This is how we can get the length of a string in Python.
Python remove spaces from a string
In python, to remove spaces from the string, we can define a function, also we will use replace() method to remove all the space from the string.
Example:
After writing the above code (python remove spaces from a string), Ones you will print ” (removespace(string1)) “ then the output will appear as a “ PYTHON ”. Here, the ” replace() “ method will remove all the space from the string. You can refer to the below screenshot for python to remove spaces from a string.
This is how we can remove spaces from a string in Python.
Remove newline from string python
In Python, to remove newline from string, we have the function rstrip() means right strip which will remove the trailing newline.
Example:
After writing the above code (remove the newline from string python), Ones you will print ” rstrip() “ then the output will appear as a “ New to Python ”. Here, the ” rstrip() “ function will remove the newline from the string.
You can refer to the below screenshot for python to remove the newline from string python.
Here, we checked how to remove newline from a string in Python.
Python remove the last character from string
Example:
After writing the above code (Python remove the last character from a string), Ones you will print ” remove “ then the output will appear as a “ Pytho ” and “ n “ is removed. Here, to remove the last character from string the string slicing technique is used. You can refer to the below screenshot for python to remove the last character from a string.
Here, we checked how to remove the last character from string.
Python convert array to string
To convert array to string in Python, we can use join() method to convert it into string.
Example:
After writing the above code (Python convert array to string), Ones you will print ” string ” then the output will appear as a “ Hello World ”. Here, the “.join “ will convert the array to string. You can refer to the below screenshot for creating a python convert array to a string.
Here, we checked how to convert array to string.
Convert list to set python
To convert list to set in Python, we can use the set() function for converting the list to set and a set does not allow duplicates so it will remove all duplicate from the list.
Example:
After writing the above code (convert list to set python), Ones you will print ” value ” then the output will appear as a “ Set is: <‘Jack’, ‘Harry’, ‘Tom’>”. Here, the set() function will convert the list to set and all duplicate elements will be removed. You can refer to the below screenshot for converting the list to set python.
Here, we checked how to convert list to set python
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In this tutorial, we have seen how we can convert a list into a string in python. Also, we have discussed:
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Converting a list to a string [duplicate]
I have extracted some data from a file and want to write it to a second file. But my program is returning the error:
This appears to be happening because write() wants a string but it is receiving a list.
8 Answers 8
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Return a string which is the concatenation of the strings in the iterable iterable. The separator between elements is the string providing this method.
will give «‘a’,’b’,’c'» as output
What is the most efficient way to concatenate many strings together? str and bytes objects are immutable, therefore concatenating many strings together is inefficient as each concatenation creates a new object. In the general case, the total runtime cost is quadratic in the total string length.
To accumulate many str objects, the recommended idiom is to place them into a list and call str.join() at the end:
(another reasonably efficient idiom is to use io.StringIO )
To accumulate many bytes objects, the recommended idiom is to extend a bytearray object using in-place concatenation (the += operator):
How to Convert List to String in Python?
Table of Contents
Python is one of the most popular programming languages today, and in this tutorial, we will learn various ways to change a list to a string. Apart from this, we will also discuss nuances of Python, including what is a list in python, what is a string, and more. Let’s start.
What Is a List in Python?
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.
Python Training Course
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 List
An 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
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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
Using Join Function
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.В
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.
Traversal of a List Function
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.
Using map() Function
The map function can be used in 2 cases to convert a list to a string.В
В 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.
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List Comprehension
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.
Iterating Through the List
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?’]
# passing in a stringВ
# listToString is a function
# initialize empty string
# string traversal using for loop
for ele in instr:В
instr = [‘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.
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