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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.
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
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
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
Procedure calls When you compute an expression of the form ( , ..., ) the Python interpreter treats this as a procedure call. It will be simpler to talk about
Coding examples Following are some attempts at defining a function isSubset, which takes two arguments, a and b, and returns True if a is a subset of b, assuming that
Task This problem creates a list containing names. The list of names will be printed, sorted, printed again in the new sorted order, written to a new output file, and searched. Ca
Use the function to compute and print the sum of first n prime numbers.
Programs and Data Object-oriented programming is a popular way of managing programs, which groups together data with the procedures that works on them, thus facilitatin
Models It is a new system that is considerably easier than the system being modelled, but which saves the important points of the original machine. We might create a physical
Programming models Just as there are several methods for organizing entire software systems, there are different strategies for formally expressing computational processe
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