The import statement

We can use any Python source file as a module by executing an import statement in some other Python source file. When the interpreter encounters an import statement, it imports the module if the module is present in the search path. A search path is a list of directories that the interpreter searches for importing a module.

When the lines of code increase, it is cumbersome to search for the required block of code. It is a good practice to differentiate the lines of code according to their working. It can be done by having separate files for different working codes. As we know, various libraries in Python provide various methods and variables that we access using simple import <library_name>. For example, math library. If we want to use the pi variable we use import math and then math.pi.

To import variables from another file, we have to import that file from the current program. This will provide access to all the methods and variables available in that file.