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Modules
As you start to write larger programs, you will want to save the function de?nitions in multiple ?les, collected together according to what they do. So, for example, we may collect a set of utility functions together into in one file, called utility.py. This ?le is known as a module in Python.
Now, if we want to use those procedures in another shell or file, we will require to say import utility so that all those procedures become available to us and to the Python interpereter. Now, if we have a function in utility.py named foo, we may use it with the name utility.foo. You may study more about modules, and how to instance reference functions described in procedures, in the Python documentation.
Non-local references So far, whenever we needed to compute a variable, there was a binding for that variable in the 'local' environment (the environment in which we were e
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Variables We cannot go very far without variables. A variable is a value related to a name that we can bind to have a particular value and then later use in an expression.
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Imagine a "particle" located on the centre square of a two-dimensional grid of dimensions 11 by 75. The particle can only move one square at a time, either up, down, left, or right
Import the sample code below into the Python IDLE and enhance it, run it and debug it. Add features to make this a more realistic database tool by providing for easy data entry an
how to calculate angle between 2 moving line in 2d space
protocol rdt2.2 considers there is a bit errors between sender to receiver and also from receiver to sender. So now we have to consider checking bit errors introduced in reply from
Procedures in Firrst-class objects In Python, unlike many other languages, methods are behave in much the same way as num bers: they can be stored as values of variabl
Rewrite the area.py program (shown below, or in the Creating Functions section of the tutorial) so that it has separate functions for the perimeter and area of a square, a rectangl
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