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0x00. Python - Hello, World

Learning Objectives 📑

  • Why Python programming is awesome
  • Who created Python
  • Where does the name ‘Python’ come from
  • Who is Guido van Rossum
  • What is the Zen of Python
  • How to use the Python interpreter
  • How to print text and variables using print
  • How to use strings
  • What are indexing and slicing in Python
  • What is the official Python coding style and how to check your code with pycodestyle

Tasks 📃

Mandatory

  • 0-run

    • Write a Shell script that runs a Python script.
    • The Python file name will be saved in the environment variable $PYFILE

  • 1-run_inline

    • Write a Shell script that runs Python code.
    • The Python code will be saved in the environment variable $PYCODE

  • 2-print.py

    • Write a Python script that prints exactly "Programming is like building a multilingual puzzle, followed by a new line.
    • Use the function print

  • 3-print_number.py

    • Complete this source code in order to print the integer stored in the variable number, followed by Battery street, followed by a new line.
    • You can find the source code here
    • The output of the script should be:
      • the number, followed by Battery street,
      • followed by a new line
    • You are not allowed to cast the variable number into a string
    • Your code must be 3 lines long

  • 4-print_float.py

    • Complete the source code in order to print the float stored in the variable number with a precision of 2 digits.
      • You can find the source code here
    • The output of the program should be:
      • Float:, followed by the float with only 2 digits
      • followed by a new line
    • You are not allowed to cast number to string

  • 5-print_string.py

    • Complete this source code in order to print 3 times a string stored in the variable str, followed by its first 9 characters.
      • You can find the source code here
    • The output of the program should be:
      • 3 times the value of str
      • followed by a new line
      • followed by the 9 first characters of str
      • followed by a new line
    • You are not allowed to use any loops or conditional statement

  • 6-concat.py

    • Complete this source code to print Welcome to Holberton School!
      • You can find the source code here
    • You are not allowed to use any loops or conditional statements.
    • You have to use the variables str1 and str2 in your new line of code
    • Your program should be exactly 5 lines long

  • 7-edges.py

    • Complete this source code
      • You can find the source code here
    • You are not allowed to use any loops or conditional statements
    • Your program should be exactly 8 lines long
    • word_first_3 should contain the first 3 letters of the variable word
    • word_last_2 should contain the last 2 letters of the variable word
    • middle_word should contain the value of the variable word without the first and last letters

  • 8-concat_edges.py

    • Complete this source code to print object-oriented programming with Python, followed by a new line.
      • You can find the source code here
    • You are not allowed to use any loops or conditional statements
    • Your program should be exactly 5 lines long
    • You are not allowed to create new variables
    • You are not allowed to use string literals

  • 9-easter_egg.py

    • Write a Python script that prints “The Zen of Python”, by TimPeters, followed by a new line.
    • Your script should be maximum 98 characters long (please check with wc -m 9-easter_egg.py)

  • 10-check_cycle.c

    • Write a function in C that checks if a singly linked list has a cycle in it.
    • Prototype: int check_cycle(listint_t *list);
    • Return: 0 if there is no cycle, 1 if there is a cycle
    • Requirements:
      • Only these functions are allowed: write, printf, putchar, puts, malloc, free
    • You are not allowed to use global variables
    • Your code must be compiled with the -Wall -Werror -Wextra -pedantic flags

Advanced

  • 100-write.py

    • Write a Python script that prints exactly and that piece of art is useful - Dora Korpar, 2015-10-19, followed by a new line.
    • Use the function write from the sys module
    • You are not allowed to use print
    • Your script should print to stderr
    • Your script should exit with the status code 1
    • (Dora Korpar was a Holberton student in Cohort 0 of San Francisco)

  • 101-compile

    • Write a script that compiles a Python script file.
    • The Python file name will be stored in the environment variable $PYFILE
    • The output filename has to be $PYFILEc (ex: export PYFILE=my_main.py => output filename: my_main.pyc)
    • Requirements:
      • Only these functions are allowed: print, open, exit, reload, compile
      • You are not allowed to use * for importing or __import__
      • Your code should not be executed when imported
    • Tip: you have to use the Python compile() function

  • 102-magic_calculation.py

    • Write the Python function def magic_calculation(a, b): that does exactly the same as the following Python bytecode: 
       3           0 LOAD_CONST               1 (98)
             3 LOAD_FAST                0 (a)
             6 LOAD_FAST                1 (b)
             9 BINARY_POWER
            10 BINARY_ADD
            11 RETURN_VALUE
    • Your code should be written at line 4 (...)
    • You are not allowed to use the * character
    • Your code should be maximum 4 lines long