Learning Python

Front 1

What does this mean?

import gio

Back 1

This tells Python to use the GIO (Gnome Input Output) module.

Front 2

What's the difference between the three methods if importing a module:

import [module]
from [module] import *
__import__

Back 2

import [module] imports the module and and creates a reference to it in the current namespace. You can use module.name to refer to things defined in the module.

from [module] import * imports all public objects (not beginning like _this) from the module. You can refer to these by their own name, and don't have to use module.name

X = __import__(‘module’) works like "import [module]" but you can assign it a name.

Front 3

How would you figure out which OS you were running Python on?

Back 3

import os

youros = os.name
switch(youros) {
case nt:
printf("Windows.\n");
break;
case dos:
printf("DOS.\n");
break;

case os2:
printf("OS\/2.\n");
break;

case mac:
printf("Mac OS.\n");
break;

case ce:
printf("Windows CE.\n");
break;

case posix:
printf("Unix or Linux.\n");
break;

Front 4

What is the difference between a "set" and a "frozenset"

Back 4

A set is an unordered collection of objects that can be modified after creation. A frozenset cannot be modified.

Front 5

How would you mount SMB shares using 'gio'?

Back 5

import gio

def mount(f):
op = gio.MountOperation()
op.connect('ask-password', ask_password_cb)
f.mount_enclosing_volume(op, mount_done_cb)

def ask_password_cb(op, message, default_user, default_domain, flags):
op.set_username(USERNAME)
op.set_domain(DOMAIN)
op.set_password(PASSWORD)
op.reply(gio.MOUNT_OPERATION_HANDLED)

def mount_done_cb(obj, res):
obj.mount_enclosing_volume_finish(res)