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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.
Worked example 1 Let's examine what happens when we compute the following Python code: def p(x, y): z = x*x - y return z + 1/z >>> p(1.0, 2.0) -2.0
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write program for character stuffing
De?nition A method de?nition has the abstract form: def ( , ..., ): ... There are essentially three parts: is a name for
Print vs Return Here are two different method declarations: def f1(x): print x + 1 def f2(x): return x + 1 What happens when we call them? >>> f1(3) 4 >>
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
Programming
Simple expressions A cornerstone of a programming language is the ability to compute expressions. We will start here with arithmetic expressions, just to take the concep
Every programming language has to have some method for indicating grouping of operations. Here is how you execute an if-then-else structure in Java: if (s == 1){ s = s
Python has a built-in list data structure that is easy to use and incredibly convenient. So, for that point, you can say >>> y = [1, 2, 3] >>> y[0] 1 >>> y[2]
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