remains useful way of thinking about computer graphics the idea is that turtle is wandering beach and as it walks around it drags its tail in the sand leaving trail behind it all that you can do with turtle is discussed in the chap there are two ways to import module in pythonthe convenient way and the safe way which way you choose to import code may be personal preferencebut there are some implications about using the convenient method of importing code the convenient way to import the turtle module would be to write the following from turtle import turtle(this is convenientbecause whenever you want to use the turtle classyou can just write turtle which is convenientbut not completely safe because you then have to make sure you never use the identifier turtle for anything else in your code in factthere may be other identifiers that the turtle module defines that you are unaware of that would also be identifiers you should not use in your code the safe way to import the turtle module would be as follows import turtle turtle turtle(while this is not quite as convenientbecause you must precede turtle with "turtle "it is safe because the namespace of your module and the turtle module are kept separate all identifiers in the turtle module are in the turtle namespacewhile the local identifiers are in the local namespace this idea of namespaces is an important feature of most programming languages it helps programmers keep from stepping on each otherstoes the rest of this text will stick to using the safe method of importing modules indentation in python programs indentation plays an important role in python programs an indented line belongs to the line it is indented under the body of function is indented under its function definition line the then part of an if statement is indented under the if while loop' body is indented under it the methods of class are all indented under the class definition line all statements that are indented the same amount and grouped together are called block it is important that all statements within block are indented exactly the same amount if they are notthen python will complain about inconsistent indentation because indentation is so important to pythonthe wing ide lets you select series of lines and adjust their indentation as groupas shown in fig you first select the lines of the block and then press the tab key to increase their indentation to decrease the indentation of block you select the lines of the block and press shift-tab as you write python code this is common chore and being able to adjust the indentation of whole block at time is real timesaver this copy belongs to 'acha