python

Leetcode solutions Problem 1: Two Sum 1 2 3 4 5 6 7 8 9 10 11 12 class Solution(object): def twoSum(self, nums, target): """ :type nums: List[int] :type target: int :rtype: List[int] """ for i in range(0, len(nums)): for j in range(0, len(nums)): if nums[i]+nums[j] == target and i!=j: op = [i,j] return op Problem 2: Roman to integer 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 class Solution(object): def romanToInt(self, s): """ :type s: str :rtype: int """ roman = {'I':1,'V':5,'X':10,'L':50,'C':100,'D':500,'M':1000,'IV':4,'IX':9,'XL':40,'XC':90,'CD':400,'CM':900} i = 0 num = 0 while i < len(s): if i+1<len(s) and s[i:i+2] in roman: num+=roman[s[i:i+2]] i+=2 else: #print(i) num+=roman[s[i]] i+=1 return num Problem 3: Pallindrome 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 class Solution(object): def isPalindrome(self, x): """ :type x: int :rtype: bool """ if x < 0: return False # Store the number in a variable number = x # This will store the reverse of the number reverse = 0 while number: reverse = reverse * 10 + number % 10 number //= 10 return x == reverse Problem 4: Longest Common Prefix 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 class Solution(object): def longestCommonPrefix(self, strs): """ :type strs: List[str] :rtype: str """ size = len(strs) # if size is 0, return empty string if (size == 0): return "" if (size == 1): return strs[0] # sort the array of strings strs....

Image processing Theory jargon Difference between supervised and unsupervised learning Criteria Supervised Learning Unsupervised Learning Data Uses labeled data for training. Uses unlabeled data for training. Goal Predict a label for new data based on past observations. Discover hidden patterns or intrinsic structures within the data. Examples Classification, Regression Clustering, Association Complexity Less complex as it has a clear goal. More complex due to the lack of clear goal. Usage When the outcome of the problem is known....

Image Analysis using pytorch Prerequisites This project is built using python in Ubuntu (WSL) and you’ll need to install the following: Any bash terminal (one of the following) Conda WSL Mac OS Any flavour of Linux Python 3 (I’m using 3.10.12) 1 2 sudo apt update sudo apt install python3 Pip 1 2 sudo apt update sudo apt install python3-pip Packages Note: Since I’m using a computer with a CUDA compatable NVIDIA GPU, I’ll be using the GPU version of pytorch....

Python Chapter summary - Unit 1 Unit 1 Python Fundamentals: An Introduction to Python programming: Introduction to Python, IDLE to develop programs; How to write your first programs: Basic coding skills, data types and variables, numeric data, string data, five of the Python functions; Control statements: Boolean expressions, selection structure, iteration structure; Define and use Functions and Modules: define and use functions, more skills for defining and using functions and modules, create and use modules, standard modules Contents What is python?...

Python virtual environment Python virtual environemt is a program that aids in creating a serperate virtual environment for each project Requiremnets Python 3 Pip Steps Installing virtual environemnt package 1 pip install virtualenv Creating virtual environent Windows - cmd/powershell 1 py -m venv {your_env_name} Linux 1 python3 -m venv myworld Activating virtual environemt Windows - cmd 1 myworld\Scripts\activate.bat Windows - powershell 1 myworld\Scripts\activate.ps1 Linux 1 source myworld/bin/activate Downloading required packages 1 py -m pip install {required_package}