Convert string values to list python

Question

I'm trying to figure out an easy way to take a string in a line from a file that is being read using readline(). Specifically, there are multiple integer values which is where I am running into issues:

10 20 30

I would like the values above to be converted into a list of separate integers:

[10, 20, 30]

The values would then be summed within a separate class. I'm certain there is something simple I could do here, but I'm just drawing a blank. Thanks in advance!

Here's more context as to what I am trying to do. I'm passing the integers into an updateMany method in my class:

vals = infile.readline() 
a.updateMany(int(vals.split())

updateMany() takes the list and sums them, adding them to a list variable local to the class.

Show us what you tried and add some more examples.

Mehraban
– Mehraban

2015-01-19 05:26:24 +00:00
Commented Jan 19, 2015 at 5:26 — Mehraban
– Mehraban, Commented Jan 19, 2015 at 5:26
Sorry - added more to the above. TY!

lrryhll
– lrryhll

2015-01-19 05:37:24 +00:00
Commented Jan 19, 2015 at 5:37 — lrryhll
– lrryhll, Commented Jan 19, 2015 at 5:37

Alex Martelli · Accepted Answer · 2015-01-19 05:18:10Z

5

For example:

thelist = [int(s) for s in thestring.split()]

answered Jan 19, 2015 at 5:18

Alex Martelli

887k175 gold badges1.3k silver badges1.4k bronze badges

Sign up to request clarification or add additional context in comments.

Comments

tom10 · Accepted Answer · 2015-01-19 05:18:25Z

2

You could use:

x = [int(i) for i in "10 20 30".split()]

then

sum(x)

answered Jan 19, 2015 at 5:18

tom10

69.5k11 gold badges133 silver badges143 bronze badges

Comments

Irshad Bhat · Accepted Answer · 2015-01-19 07:06:53Z

2

You van use map(). It takes items from a list and applies given function upon them.

>>> string = "10 20 30"
>>> map(int, string.split())
[10, 20, 30]

edited Jan 19, 2015 at 7:06

answered Jan 19, 2015 at 5:24

Irshad Bhat

8,7792 gold badges31 silver badges37 bronze badges

Comments

lqhcpsgbl · Accepted Answer · 2015-01-19 06:12:28Z

0

If you just use space as separator, you can use split method of a string object:

>>> num_line = '10 20 30'
>>> [int(num) for num in num_line.split() if num]
[10, 20, 30]

If your separator is more than one char like ',' and '.' or space, you can use re.split():

>>> import re
>>> re_str = "[,. ]"
>>> num_line = '10, 20, 30.'
>>> [int(num) for num in re.split(re_str, num_line) if num]
[10, 20, 30]

answered Jan 19, 2015 at 6:12

lqhcpsgbl

3,8023 gold badges23 silver badges30 bronze badges

Comments

lrryhll · Accepted Answer · 2015-01-19 18:38:08Z

0

Thanks everyone for your help and different ways of solving this. I ended up using the following to get my values:

intList = [int(i) for i in vals.split(sep=' ')]
a.updateMany(intList)

Cheers!

answered Jan 19, 2015 at 18:38

lrryhll

554 bronze badges

Collectives™ on Stack Overflow

Convert string values to list python

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related