1. Nate Brunelle Today: Web Reading
CS1110
Nate Brunelle
Today: Web Reading

2. Questions?

3. Representing Data as Text
CSV format: Comma Separated Values
Data has records:
One record per line
Records separated by \n (newline)
E.g. one purchase (Pears,2.8)
Records have cells:
Separated by ,
Each record must have the same number of cells
E.g. the thing purchased (Pears)
Apples,10.0
Pears,2.8
Peaches,5.2
Grapes,19.4
Apples,100.0

4. Processing a CSV Split text into lines (i.e. records)
Split each line (record) into cells
Do what we wanted to do with the cells

5. read() vs. readline() readline(): read(): readlines():
Gives the next line of text from the file
read():
Gives the rest of the file as a string
readlines():
Gives the rest of the file as a list of strings

6. Reading a file vs. web import urllib.request
s = open(filename, ‘r’) for x in s: c = x.strip().split(‘,’) …
import urllib.request
s = urllib.request.urlopen(url)
for x in s:
x = x.decode(‘utf-8’)
c = x.strip().split(‘,’) …