Added extract numbers from string in python

snippets/python/s/extract-number-from-string.md

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+---
+title: Extract number(s) from string
+type: snippet
+language: python
+tags: [string,regexp]
+cover: succulent-10
+dateModified: 2023-09-16T05:00:00-04:00
+---
+Extracts number(s) from a string. Returns all numbers present in a string as float in a list.
+
+- Uses regex to find all numbers.
+- **re.findall()** function is used to find all numeric values in the input string '**text**'
+- The regular expression **r'\d+\.\d+|\d+'** matches both floating-point numbers (e.g., 25.99) and integers (e.g., 19).
+- The extracted numbers are initially stored as strings. This can be converted to numeric types (e.g., float or int) based on requirements.
+
+```py
+def extract_numbers(text):
+  numbers = re.findall(r'\d+\.\d+|\d+', text)
+  # Convert the extracted strings to float if needed
+  numbers = [float(number) for number in numbers]
+  return numbers
+
+```
+
+```py
+extract_numbers("The price of the products are $25.99 and $19.95.") # [25.99, 19.95]
+```