Пространства имён

3.13.5.py

# -*- encoding: utf-8 -*-
"""
Использование атрибутов, методов и классов модуля
"""

import library
library.sys
print library.name
print library.func, library.klass
print library.__dict__.keys()

3.13.6.py

# -*- encoding: utf-8 -*-
"""
Изменение атрибутов модуля
"""

import simple                  # first import: loads and runs file's code
print simple.spam                # assignment makes an attribute
simple.spam = 2                # change attribute in module
import simple                  # just fetches already-loaded module
print simple.spam                # code wasn't rerun: attribute unchanged

3.13.7.py

# -*- encoding: utf-8 -*-
"""
Атрибуты модуля и глобальные переменные
"""

X = 11               # my X: global to this file only
import globs          # gain access to names in moda
globs.f()             # sets globs.X, not my X
print X, globs.X

3.13.8.py

# -*- encoding: utf-8 -*-
"""
Перезагрузка модуля
"""

import changer
changer.printer()
import changer
changer.printer()      # no effect: uses loaded module
reload(changer)        # forces new code to load/run
changer.printer()      # runs the new version now

changer.py

# -*- encoding: utf-8 -*-
"""
Модуль changer
"""

#File: changer.py

message = "First version" 

def printer():
    print message 

globs.py

# -*- encoding: utf-8 -*-
"""
Модуль globs
"""

#File: globs.py

X = 88               # my X: global to this file only

def f():
    global X         # change my X
    X = 99           # cannot see names in other modules

library.py

# -*- encoding: utf-8 -*-
"""
Модуль library
"""

#File: library.py

print 'starting to load...'

import sys
name = 42

def func(): pass

class klass: pass

print 'done loading.'

simple.py

# -*- encoding: utf-8 -*-
"""
Модуль simple
"""

#File: simple.py

print 'hello'
spam = 1