CSC108H1 Lecture Notes - Lecture 3: Semiperimeter, Operand, Standard Streams
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CSC108H1 Full Course Notes
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Python contains many functions, but not all of them are immediately available as builtin functions. Instead of being available as builtins, some functions are saved in different modules. A module is a file containing function definitions and other statements. We may also define our own modules with our own functions. import. In order to gain access to the functions in a module, we must import that module. The general form of an import statement is: import module_name. To access a function within a module, we use: module_name. function_name. For example, we can import the python module math and call the function sqrt from it: import math def area2(side1, side2, side3): semi = semiperimeter(side1, side2, side3) area = math. sqrt(semi * (semi - side1) * (semi - side2) In addition to importing python"s modules, we can also import the modules that we write. For example, to use the functions from triangle. py (from the video) in another module, we would import triangle.
