split and join

Learn to split with split and join with join.

split splits a string by a separator into a list. join does the opposite: it joins a list with a separator into a string:

parts = "a,b,c".split(",")
# ["a", "b", "c"]
joined = ",".join(parts)
# "a,b,c"

If no separator is given, split uses whitespace. join requires all list items to be strings; otherwise it raises TypeError.

These two methods are very handy for working with CSV files and log lines.

split separator usage

The split separator can be any character. Splitting by space is common:

words = "hello world python".split()
# ["hello", "world", "python"]

If no separator is given, split() treats multiple spaces as one and trims leading/trailing spaces. This is ideal for parsing user input.

You can split more precisely by giving a separator.

Assign "a,b,c" to text. Assign text.split(",") to parts. Assign "-".join(parts) to result. Then print print(result).

Show example solution

text = "a,b,c"
parts = text.split(",")
result = "-".join(parts)
print(result)

Complete the join call

result = ____.join(["a", "b", "c"])

Show answer

result = ",".join(["a", "b", "c"])