0x02-python-import_modules

0x02. Python - import & modules

Resource

• Modules
• Command line arguments

Tasks

0. Import a simple function from a simple file : Write a program that imports the function def add(a, b): from the file add_0.py and prints the result of the addition 1 + 2 = 3

   • You have to assign:
     • the value 1 to a variable called a
     • the value 2 to a variable called b
     • and use those two variables as arguments when calling the functions add and print
   • a and b must be defined in 2 different lines: a = 1 and another b = 2
   • Your program should print: <a value> + <b value> = <add(a, b) value> followed with a new line
   • You can only use the word add_0 once in your code
   • You are not allowed to use * for importing or __import__
   • Your code should not be executed when imported - by using __import__, like the example below.

1. My first toolbox! : Write a program that imports functions from the file calculator_1.py, does some Maths, and prints the result.

   • Do not use the function print (with string format to display integers) more than 4 times
   • You have to define:
     • the value 10 to a variable a
     • the value 5 to a variable b
     • and use those two variables only, as arguments when calling functions (including print)
   • a and b must be defined in 2 different lines: a = 10 and another b = 5
   • Your program should call each of the imported functions. See example below for format
   • the word calculator_1 should be used only once in your file
   • You are not allowed to use * for importing or __import__
   • Your code should not be executed when imported

2. How to make a script dynamic! : Write a program that prints the number of and the list of its arguments.

   • The output should be:
     • Number of argument(s) followed by argument (if number is one) or arguments (otherwise), followed by
     • : (or . if no arguments were passed) followed by
     • a new line, followed by (if at least one argument),
     • one line per argument:
       • the position of the argument (starting at 1) followed by :, followed by the argument value and a new line
   • Your code should not be executed when imported
   • The number of elements of argv can be retrieved by using: len(argv)
   • You do not have to fully understand lists yet, but imagine that argv can be used just like a C array: you can use an index to walk through it. There are other ways (which will be preferred for future project tasks), if you know them you can use them.

3. Infinite addition : Write a program that prints the result of the addition of all arguments.

   • The output should be the result of the addition of all arguments, followed by a new line
   • You can cast arguments into integers by using int() (you can assume that all arguments can be casted into integers)
   • Your code should not be executed when imported
   • Last but not least, your program should also handle big numbers.

   guillaume@ubuntu:~/0x02$ ./3-infinite_add.py 1111111111111111111111111111111111111111111111111111111111112222222222222222222222222222222222223435467866765443534434222222254444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555666666666666666666666666666666777777777777777777777777777777888888888888888888888888888888899999999999999999999999990000000000000000000 11111111111111111111111111111111111111111111111111222222222222222222222222222333333333333333333334567788888899999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
   11111111111111111111111111111111111111111111111111222222222222222222222222222333333333333333333334568900000011111111111111111111111111111111111111111111111111112222222222222222222222222222222222223435467866765443534434222222254444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555666666666666666666666666666666777777777777777777777777777777888888888888888888888888888888899999999999999999999999989999999999999999999
   guillaume@ubuntu:~/0x02$

4. Who are you? : Write a program that prints all the names defined by the compiled module hidden_4.pyc (please download it locally).

   • You should print one name per line, in alpha order
   • You should print only names that do not start with __
   • Your code should not be executed when imported
   • Make sure you are running your code in Python3.8.x (hidden_4.pyc has been compiled with this version)

5. Everything can be imported : Write a program that imports the variable a from the file variable_load_5.py and prints its value.

   • You are not allowed to use * for importing or __import__
   • Your code should not be executed when imported