Programs in Python . . How to import modules in Python? We can import the definitions inside a module to another module.
We use the import keyword to do this. To import our previously defined module factorial we type the following in the Python prompt. >>> import factorial Using the module name we can access the functions defined inside the module. The dot (.) operator is used to access the functions.
The syntax for accessing the functions from the module is <module name> . <function name> For example: >>> factorial.fact( ) factorial . fact ( ) Function call Dot operator Module name Python has number of standard (built in) modules. Standard modules can be imported the same way as we import our user-defined modules.
We are now going to see the Standard modules which are required for our program to run C++ code. . . .
Python’s sys module This module provides access to builtin variables used by the interpreter. One among the variable in sys module is argv sys.argv sys.argv is the list of command-line arguments passed to the Python program. argv contains all the items that come via the command-line input, it's basically a list holding the command-line arguments of the program. To use sys.argv , import sys should be used.
The first argument, sys.argv[ ] contains the name of the python program (example pali.py) and sys.argv [ ]is the next argument passed to the program (here it is the C++ file), which will be the argument passed through main (). For example 12th Computer Chapter - - main(sys.argv[ ]) The input file (C++ file) is send along with its path as a list(array) using argv[ ] . argv[ ] contains the Python program which need not be passed because by default contains source code reference. .
. . Python's OS Module The OS module in Python provides a way of using operating system dependent functionality. The functions that the OS module allows you to interface with the Windows operating system where Python is running on.
os.system(): Execute the C++ compiling command (a string contains Unix, C command which also supports C++ command) in