On Mar 3, 2013, at 9:24 PM, DoanVietTrungAtGmail wrote: > Dear tutors > > I am checking out csv as a possible data structure for my records. In each > record, some fields are an integer and some are a list of integers of > variable length. I use csv.DictWriter to write data. When reading out using > csv.DictReader, each row is read as a string, per the csv module's standard > behaviour. To get these columns as lists of integers, I can think of only a > multi-step process: first, remove the brackets enclosing the string; second, > split the string into a list containing substrings; third, convert each > substring into an integer. This process seems inelegant. Is there a better > way to get integers and lists of integers from a csv file?
A quick search for "python list object from string representation of list" returned an idea from stackoverflow which I have adapted for integers: >>> import ast >>> num_string = "[1, 2, 3]" >>> ast.literal_eval(num_string) [1, 2, 3] Take care, Don _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
