layout: post

title: "[Python] namedtuple"

date: 2018-07-03 14:30:00 +0800

author: Zhang Yu

categories: python

tags: python

collections.namedtuple(typename, field_names, *, verbos=False, rename=False, module=False)

example:

Point = namedtuple('Point', ['x', 'y'])

p = Point(11, y=22)

**Named tuple are especially useful for assigning field names to result tuples returned by the csv or sqlite3 modules:**

EmployeeRecord = namedtuple('EmployeeRecord', 'name, age, title, department, paygrade')

import csv

for emp in map(EmployeeRecord._make, csv.reader(open('employees.csv', 'rb'))):

pirint(emp.name, emp.title)

import sqlite3

conn = sqlite3.connect('/companydata')

cursor = conn.cursor()

cursor.execute("SELECT name, age, title, department, paygrade FROM employees')

for emp in map(EmployeeRecord._make, cursor.fetchall()):

print(emp.name, emp.title)