Python how to join list of lists using join function

Question

I am new to Python. Have a question regarding join function.

masterlist = [
    ('ap172', ['33', '212-583-1173', '19 Boxer Rd.', 'New York', 'NY', '10005']),
    ('axe99', ['42', '212-582-5959', '315 W. 115th Street, Apt. 11B', 'New York', 'NY', '10027'])
]

I want to print each element of list delimited by pipe.

If I try:

for i in masterlist:
    mystring = '|'.join(i)                                      
    print mystring

The error is:

TypeError: sequence item 1: expected string, list found

So I am trying:

for i in masterlist:
    mystring = i[0] 
    mystring += '|'.join(i[1])                                  
    print mystring

and I get:

ap17233|212-583-1173|19 Boxer Rd.|New York|NY|10005
axe9942|212-582-5959|315 W. 115th Street, Apt. 11B|New York|NY|10027

So it works but would like to know if there is a better way to join the above masterlist using join function?

I don't know if this is what you meant to do, but the first two elements, ie 'ap172' and '33', aren't being separated by a pipe. — Manny D
– Manny D, Commented Sep 26, 2011 at 21:45

varunl · Accepted Answer · 2011-09-27 07:05:42Z

3

I think splitting up the tuples in the for loop would be cleaner.

for identifier, data in masterlist:
     print "%s%s" %(identifier, '|'.join(data))

edited Sep 27, 2011 at 7:05

varunl

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answered Sep 26, 2011 at 21:49

Winston Ewert

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1 Comment

SUM Over a year ago

Hi, To get what I was trying I modified the last statement to: print "%s%s%s" %(identifier, '|', '|'.join(data)) Thanks!

donkopotamus · Accepted Answer · 2011-09-26 22:17:14Z

2

from itertools import chain
for symbol, items in masterlist:
    print "|".join(chain( [symbol], items))

answered Sep 26, 2011 at 22:17

donkopotamus

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Comments

Buddy Lindsey · Accepted Answer · 2011-09-26 21:46:39Z

1

To get what you got you can try

for i in masterlist:
    print i[0] + '|'.join(i[1])

To get what I think your after you can try this

for i in masterlist:
    print i[0] + '|' + '|'.join(i[1])

There are many many ways to do this, these are just 2.

answered Sep 26, 2011 at 21:46

Buddy Lindsey

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Comments

Austin Marshall · Accepted Answer · 2011-09-26 21:51:10Z

1

for i in masterlist:
    print '|'.join([i[0]] + i[1])

answered Sep 26, 2011 at 21:51

Austin Marshall

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