How to Extract Float Value from a String in Python?

This tutorial shows examples to extract the float value from a string in Python.

Example: Extract Float Value from a String in Python

Suppose you have a number of strings similar to Current Level: 4.89 db. and you want to extract just the floating-point number.

user_input = "Current Level: 4.89 db"
for token in user_input.split():
    try:
        print (float(token), "is a float")
    except ValueError:
        print (token, "is something else")

Output:

Current is something else
Level: is something else
4.89 is a float
db is something else

Example 2: Using re Library

import re
re.findall("\d+\.\d+", "Current Level: 47.5 db.")

Output:

['47.5']

Reference: Extract float from a string in Python.

See also:

• Add Two Lists in Python