sksoumik

import cv2

# read an image from disk in RGB format
image = cv2.imread("your/image/path", 1)

# display the image in a specified window
cv2.imshow("Window Name", image)

# set the time 5 seconds for displaying the window 
cv2.waitKey(5000)

sksoumik

import functools

sequence = [10, 20, 30, 15]


"""
-----------------------------------------------------
Example 1: sum up all the items in the sequence list.
-----------------------------------------------------
"""

sksoumik

# Reading json files
import json

def read_json_content(file_path):
    with open(file_path, 'r', encoding='utf-8') as fp:
        data = json.loads(fp.read())
        
    if data is None:
        raise Exception('Invalid JSON')
    return data

sksoumik

# Read multiple json files from a directory and convert them to pandas dataframe
# Add file names as a new column in DataFrame
import pandas as pd
import json
import os


path_to_json = 'path/to/json/files'

data_list = []

sksoumik

import cv2
import matplotlib.pyplot as plt


sample_image = cv2.imread("path/of/image")
plt.axis("off")
plt.imshow(cv2.cvtColor(sample_image, cv2.COLOR_BGR2RGB))
plt.show()

sksoumik

seq = [1, 2, 3, 4]
# result contains odd numbers of the list
result = filter(lambda x: x + 1, seq)
print(list(result))  # Output: [1, 2, 3, 4]
# Does nothing on seq as the lambda function does not hold any condition

# filter only works on condition, so we need to give some conditional statement with lambda
result = filter(lambda x: x % 2 == 0,
                seq)  # returns the elements which are only divisible by two
print(list(result))  # output: [2, 4]

sksoumik

def add_t(x):
    return x + 1


tuple_1 = (1, 2, 3, 4)
map_sample_1 = tuple(map(add_t, tuple_1))
print(map_sample_1)  # output: (2, 3, 4, 5)
# ---------------------------------------------------------------

sksoumik

# A lambda function that multiplies two numbers
multiply = lambda x, y: x * y
print(multiply(2, 2))  # output: 4

# A lambda function that multiplies three numbers
multiply = lambda x, y, z: x * y * z
print(multiply(2, 2, 2))  # output: 8

# A lambda function that adds 10 to the number passed in as an argument, and print the resul
a = lambda a: a + 10

sksoumik

class Person(models.Model):
    name = models.CharField(max_length=255)  # Mandatory
    bio = models.TextField(max_length=500, blank=True)  # Optional (don't put null=True)
    birth_date = models.DateField(null=True, blank=True) # Optional (here you may add null=True)

sksoumik

# Merge Sort | Time Complexity O(NlogN)
def mergeSort(alist):
    print("Splitting ", alist)
    if len(alist) > 1:
        mid = len(alist) // 2
        lefthalf = alist[:mid]
        righthalf = alist[mid:]

        mergeSort(lefthalf)
        print("LeftHalf ", lefthalf)