How do I deal with large, hex numbers in Sage (say ones with 256 or 512 bytes)? How would I import them from a CSV file?
(cf. this related answer)
You can deal with .csv files by importing the csv module.
Hexadecimals are represented by numbers starting with 0x, see this page :
sage: 0x100
256
sage: 0x123
291To transform an hexadecimal string representation s of a number to a Sage integer (that can be very long), you can do:
sage: s = '123'
sage: ZZ('0x'+s)
291If you need more informations, you should provide a sample of your csv file and the result you would expect.
Here's what I did, and it works very well:
import csv
mylist=[]
with open('~/Downloads/datasmall.txt', 'rb') as csvfile:
data = csv.reader(csvfile)
for row in data:
mylist.append([int(row[1]),float.fromhex(row[2])])Asked: 10 years ago
Seen: 6,650 times
Last updated: Mar 07 '15
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