December 2018
Intermediate to advanced
226 pages
4h 57m
English
Content preview from Practical Network Automation - Second Edition
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Using regular expressions (regex)
There are times when an engineer wants to parse specific data from a sentence or a big chunk of data. Regex is the best tool of the trade for this purpose. Regex is a common concept in every programming language, with the only difference being the syntax in each programming language.
The following example shows how to use regex in Python:
import resample="From Jan 2018 till Nov 2018 I was learning python daily at 10:00 PM"# '\W+' represents Non-Alphanumeric characters or group of charactersprint(re.split('\W+', sample))#Extract only the month and Year from the string and print itregex=re.compile('(?P<month>\w{3})\s+(?P<year>[0-9]{4})')for m in regex.finditer(sample): value=m.groupdict() print ("Month: "+value['month']+" ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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