Check if the string color is a legal Tkinter color string.

Set focus on canvas (in order to collect key-events)

dummy method - to be overwritten by child class

Bind fun to mouse-click event on turtle. fun must be a function with two arguments, the coordinates of the clicked point on the canvas

Bind fun to mouse-move-event (with pressed mouse button) on turtle. fun must be a function with two arguments, the coordinates of the

If key is given, bind fun to key-press event of key. Otherwise bind fun to any key-press. Canvas must have focus. See method listen.

Bind fun to key-release event of key. Canvas must have focus. See method listen

Bind fun to mouse-button-release event on turtle. fun must be a function with two arguments, the coordinates of the point on the canva

Bind fun to mouse-click event on canvas. fun must be a function with two arguments, the coordinates of the clicked point on the canvas

Install a timer, which calls fun after t milliseconds.

returns list of coordinate-pairs of points of item Example (for insiders): >>> from turtle import * >>> getscreen()._pointlist

Resize the canvas the turtles are drawing on. Does not alter the drawing window.

Turns pen clockwise by angle.

Configure image item as to draw image object at center of canvas. Set item to the first item in the displaylist, so it will be drawn b

Return 'line' or 'polygon' or 'image' depending on type of item.

Reverse a _goto. Used for undo()

Redraw graphics items on canvas

Performs the writing for write()

hare and tortoise

Use a stack to check if a string of parentheses is balanced. >>> balanced_parentheses("([]{})") True >>> balanced_parentheses("[()]{}{[()(

'forward' method, which canvas itself has inherited...

Bellman-Ford algorithm for finding the shortest path from a source node to all other nodes in a graph. :param graph: the graph :param sou

A recursive binary search function. It returns location of x in given array arr[l..r] is present, otherwise -1

builds a Binary Tree taking (int) value as an argument and returns the root to the tree built.

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Shut the turtlegraphics window. Example (for a TurtleScreen instance named screen): >>> screen.bye()

Function for checking valid squares.

Delete all drawings and all turtles from the TurtleScreen. No argument. Reset empty TurtleScreen to its initial state: white backgro

Delete stamp with given stampid Argument: stampid - an integer, must be return value of previous stamp() call. Example (for

Delete all or first/last n of turtle's stamps. Optional argument: n -- an integer If n is None, delete all of pen's stamps,

This function makes the clone of given tree. It mainly uses copyLeftRightNode() and copyRandom()