Data Science

                                                OS OS stand for operating System, os python ka built in module hai to ise hme install nhi krna padega , OS module hame operating system se related operation krne mai madad krta hai jaise ki current working directory dekhna ya fir usay change krna , os module ki madad se hm koi bhi folder kisi bhi drive mai create kr skte hai. Aayiye ise aur clear banate hai example ki madad se  ------------------------ import os   #os module ko import krne ke liye  ---------------------------------------------------------------- print(os.getcwd()) output: C:\Users\hp #cwd stand for current working directory , getcwd function hame hamari current working directory batata hai ----------------------------------------------------------- print(dir(os)) output: ['DirEntry', 'F_OK', 'MutableMapping', 'O_APPEND', 'O_BINARY', 'O_CREA...

                            Pandas Pandas ek open source data analysis library hai jo ki python mai likhi gyi hai, Agar saaf shabdo mai kahe to pandas is package for data frame. Data frame ek table jaisa hai, ya fir ye kahna bura nhi hoga ki data frame ek 2 dimensional array jaisa hai jisme row aur coloum hai , Data Frame mai hm numeric ,string ,character data store kr skte hai. Pandas ka use ham data frame mai operation krne ke liye krte hai Install pandas pip install pandas Import import pandas as pd How to work with Dataframe:- hm jis dataset ke sath kaam krne ja rahe hai usse ap yaha se download kr skte hai. https://github.com/StephanieStallworth/Exploratory_Data_Analysis_Visualization_Python/blob/master/DemographicData.csv import pandas as pd stats = pd.read_csv('DemographicData.csv') # it read the file and then create the data frame stats output Country Name Country Code Birth rate Internet users Income Group 0 ...