Python string get leading characters up to first comma
I have the following string:
strIn = "Head,0.000235532,0.43656735"
I would like to retrieve from this a variable type = "Head" and an array vals = [0.000235532,0.43656735]
How can I do this using Python? I've considered using strIn[0],...,strIn[5] to get the type, but then I realized I'll get types of various lengths. Thanks.
If you're using Python 3, you can do
type_, *vals = strIn.split(',')
vals = [float(v) for v in vals] # Convert list of strings to list of floats.
This uses str.split to split the string into a list based on the provided character, and then uses Python 3's extended tuple unpacking to put the first value into type_ and the remaining values into vals . See this answer for more discussion on how to use tuple unpacking.
If you're on Python 2 you can't use the extended unpacking syntax, so you have to add an additional step:
str_list = strIn.split(',')
type_ = str_list[0]
vals = [float(v) for v in str_list[1:]]
As you are in python2 first split with , then use slicing and float function :
>>> none=strIn.split(',')[0]
>>> none
'Head'
>>> vals=map(float,strIn.split(',')[1:])
>>> vals
[0.000235532, 0.43656735]
As type is a built-in name recommended that dont use it !
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