CODEWITHSUNDEEP
pythonstringlist
chattrat423
chattrat423

Reputation: 603

Python list iteration and join

I am trying to write a function that returns a string that looks like this (2,3|5,6|8,9), but my function on returns a blank string

numbers = [(4,5,6),(1,2,3),(7,8,9)]
def get_numbers(x):
  mystring = ""
  x = sorted(x)
  for n in x:
    if mystring is not "":
      mystring+="|"
    mystring+",".join(str(z) for z in n[1:])
  return mystring

How can I fix this?

Upvotes: 0

Views: 174

Answers (3)

DevLounge
DevLounge

Reputation: 8437

just for fun, a ugly one liner ;-)

'(' + '|'.join([','.join(map(str, l[1:])) for l in numbers]) + ')'

I also added the brackets as you wrote that you want a string looking like this.

Upvotes: 0

JRazor
JRazor

Reputation: 2817

Use join for change list and tuple to string

values = map(lambda x: x[1:], sorted(numbers))

print "|".join([",".join(map(str, value)) for value in values])

Upvotes: 1

th3an0maly
th3an0maly

Reputation: 3510

There's a tiny bug. You typed mystring= instead of mystring +=

numbers = [(4,5,6),(1,2,3),(7,8,9)]
def get_numbers(x):
  mystring = ""
  x = sorted(x)
  for n in x:
    if mystring is not "":
      mystring+="|"
    mystring+=",".join(str(z) for z in n[1:])
  return mystring

Upvotes: 2

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