Environments in python, Python Programming

Environments in Python

Generally, Python establishes the following binding environments:

1.  builtin    : the mother of all environments: it contains the de?nitions of all sorts of basic function, like sum and list. It is the parent of all module environments.

2.  Module: each  separate ?le that  contains Python code  is called  a module and  establishes its own environment, whose  parent is      builtin

3.  Procedure calls: A Function that is described at the 'top level' of a module (that is, not nested in the de?nition of another procedure) has the module's  environment  as its parent, and  has its name  described in the module's environment.  Methods that are described under  other  procedures have  the  procedure-call environment of the  containing procedure as their parent.

We have seen two operations that cause bindings to be created:  assignments and procedure calls. Bindings  are also created when  you compute an import statement. If you compute import math then  a ?le associated with  the  math module is computed and  the  name  math is related, in the current environment, to the math  module, which  is an environment. No other values  are included to the current environment, and if you need  to show to names  in that part, you have to examine them, as in math.sqrt. If you run from math import sqrt then  the  math ?le is computed, and  the  name  sqrt is related, in the  current environment, to whatever the name  sqrt is bound in the math function. But note  that  if you  do this,  the name math is not related to anything, and  you cannot take any other  procedures in the math module unless  you import them  outside,  as well


Posted Date: 8/11/2012 2:44:35 AM | Location : United States

Related Discussions:- Environments in python, Assignment Help, Ask Question on Environments in python, Get Answer, Expert's Help, Environments in python Discussions

Write discussion on Environments in python
Your posts are moderated
Related Questions
I have python game project which is due by next Tuesday. Do you think that I can get it on time if I order today?

Normalize a vector Let's imagine we want  to normalize a vector  of three  variables;  that  is to compute a new  vector  of three values,  such that its size  is 1. Here is o

Primitives, Composition, Abstraction, and Patterns   We will  start  by thinking about  how  the  PCAP  framework applies to computer programs, in general. We may do that by

Non-local references in procedures There  is an important subtlety in the  way  names  are handled in the  environment created by a function call. When  a value  that  is not

I need server, client and trusted side communicating and charging a service with that protocol (or needham shroeder)

1)    Write a python programmecomparing for and while loops like the following. Math Times table For Loop: 2x1=2 2x2=4 ..... 2x12=24 While Loop: 3x1=3 3x

Programming models Just  as there  are several methods for organizing entire  software systems, there  are  different strategies for formally expressing computational processe

We encourage you to adopt an interactive style of debugging and programming. Use the Python shell a lot. Write short pieces of code and check them.  It is much  simpler to test the

Write a program on python to give solution for driven and damped rlc circuit