0x00-python-hello_world

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