How to find nth data in python after special char?

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I have a file that contains some information in the line. I just want to print the words after the last character ∑. How can I do this?

text:

App∑Category∑Rating∑Reviews∑Size∑Installs∑Type∑Price∑Content Rating∑Genres∑Last Updated∑Current Ver∑Android Ver
Photo Editor & Candy Camera & Grid & ScrapBook∑ART_AND_DESIGN∑4.1∑159∑19M∑10,000+∑Free∑0∑Everyone∑Art & Design∑7-Jan-18∑1.0.0∑4.0.3 and up
Coloring book moana∑ART_AND_DESIGN∑3.9∑967∑14M∑500,000+∑Free∑0∑Everyone∑Art & Design;Pretend Play∑15-Jan-18∑2.0.0∑4.0.3 and up

Code:

def mapper(_, line):
    words = line.split('∑')

Result: [4.0.3 and up, 4.0.3 and up]

bigdata mapreduce python split
2 Answers

You can just use the index [-1] as follows:

def mapper(_, line):
    words = line.split('∑')
    print(words[-1])
user_131791990

An efficient method is to use rsplit with a maxsplit of 1, and take the last item:

def mapper(_, line):
    last = line.rsplit('∑', maxsplit=1)[-1]

Note that this will default to the full line if there isn't the split character in the line.

If you want to ensure that there is a valid split:

def mapper(_, line):
    chunks = line.rsplit('∑', maxsplit=1)
    last = chunks[1] if len(chunks)==2 else None # or other default value
user_163434640
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