CODEWITHSUNDEEP
pythonlistmathappend
Shoryu
Shoryu

Reputation: 225

Making new lists out of other list variables

When i want to make a new list out of carefully selected integer variables, and ask for the sum of the new list, the answer i get is always 0.

    else:
        if "--" in epart:
            epart = epart[2:]
            esplit = [int(epart) for epart in esplit]
            total.append(epart)
        else:
            epart = [int(epart) for epart in esplit]
            total.append(epart)

print sum(total)

At the top of the code is:

total = []

How do I get the code to print the sum of the totals, if:

esplit = ["34", "-3", "5", "--4"]
for epart in esplit:

Rather then 0, the program shoud print 40

Upvotes: 0

Views: 50

Answers (2)

Jan Vlcinsky
Jan Vlcinsky

Reputation: 44112

You might use "string.replace" to turn "--" into "" and then convert values into int:

>>> esplit = ["34", "-3", "5", "--4"]
>>> sum([int(itm.replace("--", "")) for itm in esplit])
40

Upvotes: 2

Josip Grggurica
Josip Grggurica

Reputation: 421

esplit = ["34", "-3", "5", "--4"]
print sum([int(elem[2:]) if "--" in elem else int(elem) for elem in esplit])

Upvotes: 1

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