Adding in python2

Question

This is a check digit exercise.

A=str(56784321)
for x in [0,2,4,6]:
    B = int(A[x])*2
        if len(str(B))==2:
            B = int(str(B)[0])+int(str(B)[1])
            print (B)

Output:

How can I use further code to add 4 of them together?

Community · Accepted Answer · 2017-05-23 11:48:11Z

1

With minimal changes to your code, you can use Python generators. See this question for a good reference.

def split_str(A):
  for x in [0,2,4,6]:
    B=int(A[x])*2
    if len(str(B))==2:
      B= int(str(B)[0])+int(str(B)[1])
    yield B

A=str(56784321)
for f in split_str(A):
  print f
print 'Sum is', sum(split_str(A))

Prints:

1
5
8
4
Sum is 18

edited May 23, 2017 at 11:48

CommunityBot

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answered Oct 26, 2012 at 2:40

Vladimir Sinenko

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4 Comments

PyJar Over a year ago

How can you do it with out putting them into function?

Vladimir Sinenko Over a year ago

@pythonBeginner, you could create an empty list before your code and append B values to it instead of yielding them. This is not that hard, you could try that yourself as an exercise.

PyJar Over a year ago

@VladimirSinenko Thanks for your advise, but could you give me an example of creating an empty list?

Vladimir Sinenko Over a year ago

It's created like this: var = []. You'll further need var.append() operator to populate the list. I suggest you to read the Python tutorial from the start.

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