How can I convert a Python tuple to string?

A tuple is a collection of objects which ordered and immutable. Tuples are sequences, just like lists. The differences between tuples and lists are, the tuples cannot be changed unlike lists and tuples use parentheses, whereas lists use square brackets. There are three different ways we can convert a python tuple to string.

• Using a for loop.

• Using the python join() method

• Using the functool.reduce() method

Using the for loop

In python, we can easily iterate the tuple elements using the for loop, then we will append/add each element to the string object. In this below example we will see how to convert the tuple to string.

Example

To avoid the TypeError while concatenating, we have changed the type of loop element before adding to the string.

t = ('p', 'y', 't', 'h', 'o', 'n', ' ', 3, '.', 10, '.', 0 )
print("Input tuple: ", t)
print(type(t))

s = ''  # crete en empty string 
for ele in t:
    s += str(ele)

print("String Output: ", s)
print(type(s))

Output

Input tuple:  ('p', 'y', 't', 'h', 'o', 'n', ' ', 3, '.', 10, '.', 0)
<class 'tuple'>
String Output:  python 3.10.0
<class 'str'>

Using the python join() method

To convert a Python tuple to a string, we will use join() method. The join() is a python string method that takes an iterable object like tuple as its argument and returns a Python string joined using a string separator or delimiter.

Syntax

str.join(iterable)

Example

Let’s take an example and convert a python tuple to string.

t = ('p', 'y', 't', 'h', 'o', 'n' )
print("Input tuple: ", t)
print(type(t))

output = "".join(t)
print("String Output: ", output)
print(type(output))

Output

Input tuple:  ('p', 'y', 't', 'h', 'o', 'n')
<class 'tuple'>
String Output:  python
<class 'str'>

Example

The join() method will raise a TypeError, if we apply the join() method to a tuple that contains mixed data types (string, float, and integer). To avoid this error, we need to convert all tuple elements to the string data type.

t = ('p', 'y', 't', 'h', 'o', 'n', ' ', 3.10, '.', 0 )
print("Input tuple: ", t)
print(type(t))

output = "".join(map(str,t))
print("String Output: ", output)
print(type(output))

Output

Input tuple:  ('p', 'y', 't', 'h', 'o', 'n', ' ', 3.1, '.', 0)
<class 'tuple'>
String Output:  python 3.1.0
<class 'str'>

By using the map() function we first converted the all tuple elements to the string data type. Then it is passed to the join method.

Using the functool.reduce() method

The reduce() function is available in the functool module and it takes a function as its first argument and an iterable as its second argument.

Syntax

functools.reduce(function, iterable[, initializer])

Example

import functools
import operator

t = ('p', 'y', 't', 'h', 'o', 'n' )
print("Input tuple: ", t)
print(type(t))

output = functools.reduce(operator.add, t)
print("String Output: ", output)
print(type(output))

Output

Input tuple:  ('p', 'y', 't', 'h', 'o', 'n')
class 'tuple'>
String Output:  python
<class 'str'>

We have to import two Python modules funtools and operator to use the reduce() and the add() functions, for converting the tuple to a string.