Python is cool.
100 Days of Code Challenge Day 11
5 min read
Photo by David Clode on Unsplash
Actually, I am a 'noobish' kind of guy and just wanted to have a catchy title :) I started learning python today and that is what this article is actually about. If you don't have a sense of humor, well.....sorry.
My name is Rick and I am in search for gig as a developer :)
I decided a week ago to sign up for another coding bootcamp called devCodeCamp. Some of the technologies they teach will be somewhat new for me. (as listed on their web site)
- C# .NET
- Python & Django
- HTML5, CSS3, Bootstrap
- ASP.NET Core
- Web Services & APIS
- Databases & SQL
- Git & GitHub
- Redux & Redux Toolkit
- Data Structures, Algorithms, Design Patterns
Class starts Monday so I figured I would start becoming acquainted with Python.
1. Naming python files
First thing I learned about the language is the files end with 'py'.#
2. Bringing in other files
When you are working with multiple python files you can 'bring them in' to your main.py file by typing 'import (name of file) - with out the extension.
3. Debugging tool in VS Code.
I've actually never used this tool. (on the left of the editor with a play and bug symbol) When you use it for the first time, it prompts you to create a launch.json file. Do so.
Where the launch.json file says "program", you can change it to run from the a specific file if you like so it doesn't just run on the file you are currently working on.
4. First lines of code
import greeting greeting.display_greeting() hours_worked = 45 pay_rate = 15 over_time_rate = 1.5 if(hours_worked > 40): extra_hours = hours_worked - 40 over_time = extra_hours * pay_rate * over_time_rate total_pay = 40 * pay_rate + over_time else: total_pay = hours_worked * pay_rate print(total_pay)
Importing the other python file that has a function which displays a greeting to the console, declaring variables, if statement, else statement, and some simple logic.
5. While loops
i=1 while i <= 5: print(i) i += 1 word = input('enter a word:') for char in word: print(char)
x = input("Enter your name:") print("Hello, " + x)
def run_calculations(): print(add_two_numbers(3,5)) print(subtract_two_numbers(10,2)) print(multiply_two_numbers_and_divide(5,8,2)) def add_two_numbers(num1, num2): result = num1 + num2 return result def subtract_two_numbers(num, num2): result = num1 - num2 return result def multiply_two_numbers_and_divide(num1, num2, num3): result = (num1 * num2)/num3 return result run_calculations() def add_all_odd_numbers(numbers): grand_total = 0 for val in numbers: if val % 2 != 0: grand_total += val return grand_total print('here it is===>',add_all_odd_numbers([1,2,1,4,3,3,2,4]))
6. First codewars in python
Your Job Find the sum of all multiples of n below m
Keep in Mind
n and m are natural numbers (positive integers)
m is excluded from the multiples
sumMul(2, 9) ==> 2 + 4 + 6 + 8 = 20
sumMul(3, 13) ==> 3 + 6 + 9 + 12 = 30
sumMul(4, 123) ==> 4 + 8 + 12 + ... = 1860
sumMul(4, -7) ==> "INVALID"
def sum_mul(n, m): if n == 0 or n < 0 or m == 0 or m < 0: return 'INVALID' if n > m: return 0 current_value = n result = 0 while current_value < m: result += current_value current_value = n + current_value return result
def sum_mul(n, m): if m>0 and n>0: return sum(range(n, m, n)) else: return 'INVALID'
The sum() function in python
a = (1, 2, 3, 4, 5) x = sum(a) print(x) # result # 15
The sum() function returns a number, the sum of all items in an iterable.
iterable Required. The sequence to sum
start Optional. A value that is added to the return value
a = (1, 2, 3, 4, 5) x = sum(a, 7) print(x) # result 22
x = range(6) for n in x: print(n) # output: # 0 # 1 # 2 # 3 # 4 # 5
The range() function returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and stops before a specified number.
range(start, stop, step)
Optional. An integer number specifying at which position to start. Default is 0
Required. An integer number specifying at which position to stop (not included).
Optional. An integer number specifying the incrementation. Default is 1
x = range(3, 6) for n in x: print(n) # output # 3 # 4 # 5
x = range(3, 20, 2) for n in x: print(n) # output # 3 # 5 # 7 # 9 # 11 # 13 # 15 # 17 # 19