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How to join a list of integers into a string in Python - LearnShareIT

How to join a list of integers into a string in Python

How to join a list of integers into a string in Python. That’s the topic I want to introduce to you today. If you’re curious about this topic, read it all. 

Join a list of integers into a string in Python

Use list comprehension.

List comprehension is a simple, easy-to-understand way to join a list of integers into a string.

Example:

  • List comprehension will iterate through the elements of an integer list along with the str() function, which will convert the iterated elements into strings.
intList = [1, 2, 3, 4, 5]

# Use list comprehension to convert a list of integers to a string
intStr = ', '.join([str(i) for i in intList])
print(intStr)
print(type(intStr))

Output:

1, 2, 3, 4, 5
<class 'str'>

You can use a for loop.

Example:

  • Create an empty string that stores the substrings.
  • Use for loop iterate over the elements and convert the elements in the list to a string.
  • Add substrings to the original empty string.
  • Finally, remove the extra spaces at the end of the string.
intList = [1, 2, 3, 4, 5]

# Create an empty string that stores the substrings.
emptyStr = ''

# Use for loop iterate over the elements and convert the elements in the list to a string.
# Add substrings to the original empty string.
for i in intList:
    emptyStr += str(i) + ', '

# Remove the excess element at the end of the string.
newStr = emptyStr.rstrip(', ')
print(newStr)
print(type(newStr))

Output:

1, 2, 3, 4, 5
<class 'str'>

Use the join() function in conjunction with the map() function.

Syntax:

str.join(object)

Parameters:

  • str: Delimiter for string concatenation.
  • object: List or tuple containing elements that are strings to be concatenated.

The join() function returns an object that is a character string of the elements of the specified list or tuple joined together by a delimiter.

Syntax:

map(function, iterable, ...)

Parameters:

  • function: The function to execute for each element in the iterable.
  • iterable: the iterable objects you want to traverse.

Example:

  • The map() function is used to convert the integers in the list to a string.
  • The map object is then passed to the join() function.
intList = [1, 2, 3, 4, 5]

# The join() and map() functions combine to convert a list of integers to a string
result = ', '.join(map(str, intList))
print(result)
print(type(result))

Output:

1, 2, 3, 4, 5
<class 'str'>

Use the index and the str() function.

Example:

  • Perform access to each index of the list. The indexes to be accessed are of integer type, want it to return a string, and use the str() function to transform.
intList = [1, 2, 3, 4, 5]

newStr = ''
for index in range(len(intList)):
    newStr = str(intList[index])
    print(newStr)
    
print(type(newStr))

Output:

1
2
3
4
5
<class 'str'>

Summary:

The article how to join a list of integers into a string in Python would like to stop here. I hope you found a method that works for you if you don’t have any ideas. Use list comprehension, which is relatively easy to understand and implement. If you have any suggestions or comments about the article, please comment.

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