How to get a value of a text block in python?-CodePudding

I have a long string, that contains

Current: 98%

exactly one time. The percentage can be everything between 0 and 100.

E.g.:

This is a multi-line
output and the battery level is
Current: 100%
Thank you.

How can I just get the value between Current: and %?

CodePudding user response：

You could use an approach such as the one below, using regular expressions.

import re
test = """
This is a multi-line
output and the battery level is
Current: 100%
Thank you.
"""
print(re.search(r'Current: (.*?)%', test).group(1))

EDIT: If you need an integer out, you can just wrap the final value with int():

result = int(re.search(r'Current: (.*?)%', test).group(1))

CodePudding user response：

Using a regular expression for this exercise is overkill. Instead, find the position of the percent sign, trim the string at that position, split it, and take the last element:

text[:text.index('%')].split()[-1]
# '100'

I assume that there is only one % in the string.

CodePudding user response：

You can use regex groups to pull out the percentage. This will match a numerical value between Current: (with a space) and the % symbol.

import re

text = """This is a multi-line
output and the battery level is
Current: 100%
Thank you."""

pattern = re.compile(r"Current: ([0-9] )%")

result = re.search(pattern, text)
print(result.group(1))

CodePudding user response：

you can use the filter function on a string if you dont like re

int("".join(filter(str.isdigit, long_string)))