def calculate_percentage_by_group(data):
total_sum = sum(data.values())
percentages = {key: (value / total_sum) * 100 for key, value in data.items()}
return percentages
data = {'Group A': 500, 'Group B': 800, 'Group C': 1200}
percentage_by_group = calculate_percentage_by_group(data)
for group, percentage in percentage_by_group.items():
print(f"{group}: {percentage:.2f}%")
Calculate percentage change
def calculate_percentage_change(old_value, new_value):
return ((new_value - old_value) / old_value) * 100
old_value = 50
new_value = 70
percentage_change = calculate_percentage_change(old_value, new_value)
print("Percentage change:", percentage_change, "%")
Calculate byte size of string
import sys
def calculate_byte_size(string):
return sys.getsizeof(string)
my_string = "Hello, world!"
byte_size = calculate_byte_size(my_string)
print("Byte size of the string:", byte_size, "bytes")
Calculate distance between two coordinates
from math import radians, sin, cos, sqrt, atan2
def calculate_distance(lat1, lon1, lat2, lon2):
lat1 = radians(lat1)
lon1 = radians(lon1)
lat2 = radians(lat2)
lon2 = radians(lon2)
dlon = lon2 - lon1
dlat = lat2 - lat1
a = sin(dlat / 2)**2 + cos(lat1) * cos(lat2) * sin(dlon / 2)**2
c = 2 * atan2(sqrt(a), sqrt(1 - a))
distance = 6371 * c
return distance
lat1, lon1 = 40.7128, -74.0060
lat2, lon2 = 34.0522, -118.2437
distance = calculate_distance(lat1, lon1, lat2, lon2)
print("Distance between New York City and Los Angeles:", distance, "km")
Calculate time difference
from datetime import datetime
start_time = datetime(2024, 4, 22, 10, 0, 0)
end_time = datetime(2024, 4, 22, 12, 30, 0)
time_difference = end_time - start_time
print("Time difference:", time_difference)
Display all images in folder
scandir() function
<?php
$directory = "images/";
$files = scandir($directory);
$imageFiles = array_filter($files, function($file) use ($directory) {
$filePath = $directory . $file;
return is_file($filePath) && in_array(pathinfo($filePath, PATHINFO_EXTENSION), array("jpg", "jpeg", "png", "gif"));
});
foreach ($imageFiles as $imageFile) {
echo '<img src="' . $directory . $imageFile . '" alt="' . $imageFile . '">';
}
?>
Display array as string
toString()
const myArray = [1, 2, 3, 4, 5]; const arrayAsString = myArray.toString(); console.log(arrayAsString);
join()
const myArray = [1, 2, 3, 4, 5];
const arrayAsString = myArray.join(', ');
console.log(arrayAsString);
Evaluate the equation and display the result
eval() function
equation = "2 * (3 + 4)"
result = eval(equation)
print("Result:", result)
Display execution time
import time
start_time = time.time()
result = 0
for i in range(1000000):
result += i
end_time = time.time()
execution_time = end_time - start_time
print("Execution time:", execution_time, "seconds")
Display elapsed time
time module
import time
start_time = time.time()
time.sleep(5)
elapsed_time = time.time() - start_time
print("Elapsed time:", elapsed_time, "seconds")