from matplotlib import pyplot as plt #importing pyplot from matplotlib for bargraph from operator import itemgetter #importing itemgetter function from library 'operator' import numpy as np #imprting numpy library as np #creating a class to store data class student: def init(self, student_id, firstname, lastname, age, country ): #creating class title self.id = student_id self.firstname = firstname self.lastname = lastname self.age = age self.country = country #function to print the data stored in class as object in firstname, lastname....country def print(self): print("","Full Name:" + self.firstname + " " + self.lastname ) print("",'ID:', self.id) print("",'Age:',self.age) print("",'Country:',self.country) print('') #this is a list to store students object students_list=[] #function to read the file def read_file(): f=open("students.txt","rt") ###opening the text file in a read mode for each_line in f: #for loop to excute the data in readable form each_line=each_line.rstrip("\n") #splits the data in .txt file as a each line student_id, lastname, firstname, age, country=each_line.split(", ") #splits the data in each line with condition (", ") data=student(student_id, lastname, firstname, age, country) #excutes data from .txt fie to add in a class title students_list.append(data) #this will add or store an object in list from file f.close() #This will close the file #function to print the student details one time so the output won't look messy def student_detail_title(): print(' ') print('| Students Details |') print('||') #defining fucntion 1 as(1a and 1b) to excute (summary_report) in function 5 later #function to print the details of the students from the module def student_details(): #initial values are kept on zero wales=0 england=0 scotland=0 count=0 #here we will count the students numbers for obj in students_list:# for loop with a conditon(obj.country==anycountry, count as 1) count=count+1 if obj.country=="Wales": wales=wales+1 if obj.country=="England": england=england+1 if obj.country=="Wales": scotland=scotland+1 #everytime the conditon meets data get stored in print()function obj.print()#printing the objects stored in class #function to print the summary report def summary_report(): #initial values kept at 0, records the no. of students from each country wales=0 england=0 scotland=0 count=0 #here we will count the students numbers for obj in students_list: count=count+1 if obj.country=="Wales": wales=wales+1 if obj.country=="England": england=england+1 if obj.country=="Wales": scotland=scotland+1 #everytime for loop meets the conditon, counts as +1 #skipping {obj.print()} command to avoid double print of the details print(' ') print('| Summary Report |') print('||') print('Total numbers of students is:',count) #this will count the total no. of students print('Total numbers of students from Wales:',wales)#this will count the no. of students from Wales print('Total numbers of students from England:',england)#this will count the no. of students from England print('Total numbers of students from Scotland:',scotland)#this will count the no. of students from Scotland " " " "" #eldest_youngest to print the youngest and eldest student and thier respective details def eldest_youngest(): print(' ') print('| Eldest & Youngest |') print('||') eldest=students_list[0].age #taking the obj data from students_list youngest=students_list[0].age for x in students_list: #excuting for loop with certain condition if(x.age>eldest): #value in x.age > eldest then it's the eldest age eldest=x.age if(x.age<youngest): #value in x.age < eldest then it's the youngest age youngest=x.age print(' ')#printing the necessary output print('The eldest student(s) age is', eldest) print('The youngest student age is', youngest) print(' ') for x in students_list: # for loop for printing the output output from above loop if (x.age==youngest or x.age==eldest): x.print() #printing the output of eldest and youngest student(s) def student_add(): old_total_age=0 #initial value=0, records the totalage) old_count=len(students_list) #returning the length of students_list for x in students_list: #forloop with centain conditon old_total_age=old_total_age+int(x.age) #calculating total age by adding total age+ (int) data in x.age old_avg_age=old_total_age/old_count #calculating the mean of the Old students total age print(' ')#menu to add new student print('| Adding new students Data |') print('||') id=input("Enter the New student's ID:") #input command to add id fn=input("Enter the stdent's Firstname:")# "" fn ln=input("Enter the stdent's Lastname:") # "" ln age=input("Enter the stdent's Age:") # "" age age=int(age) #takes the (int) value only country=input("Enter the stdent's Origin:")# "" country new_student_data=student(id, fn, ln, age, country) students_list.append(new_student_data) #appends the old (students_list) data into (new_student_data) print("") print("Data Added Successfully in the list") print("") new_total_age=old_total_age+age #storing new data in variabe(new_total_age) new_avg_age=new_total_age/(old_count+1) #Calculating the mean of new total age print("The increase in the number of students: 1") print("Previous age average: ", round(old_avg_age, 2)) # printing & roundingup old age avrage print("New age average: ", round(new_avg_age, 2)) #printing & rounding up new average age print("Difference age average: ", round(new_avg_age-old_avg_age, 2)) #printing difference in (old average age- new average age) #function 4 to search the student details using student's ID def student_search(): found=False #conditon using boolian id=input("Enter the student ID to search:") #userinput(ID) for x in students_list: #for loop to scan the ID given in each ID data of list if(x.id==id): #condition: given id== ids) print("Found and it's details are as follow")#prints found message to user x.print() #prints the detail that matches the ID found=True #meets the conditon TRUE break #breaks the loop if (found==False): #if not found,creates the conditon userinput==false & excutes this code print("Sorry! The data you have entered does not match our record")#prints #not found message to user #function to re-arrage the student details alphabetically using surname def sortby_age(): n=len(students_list) #returning the length of students_list for i in range (0,n): #for loop to see the value in each line[list i] for j in range(i+1,n): #for loop to see the value in each case[listj] #if stored value students_list[i].age>stuents_list[j].age, smaller value is kept on first if (students_list[i].age>students_list[j].age): #use this conditon unless every value is scanned and arranged c=students_list[i].age students_list[i].age=students_list[j].age students_list[j].age=c #comparing with data in [list c] print("")#printing the message print("All the data is sorted according to youngest to eldest age") print("_________________________________") student_details() #excuting the (student_details) to rearrage according to codndition #bargraph to plot the barchart with: no. of students and their origin def bargraph(): num_w=0 #This will record the number of students from wales num_e=0 num_s=0 for x in students_list: #for loop with the codition (x.coutry==given country, count as +1) if(x.country=="Wales"): num_w=num_w+1 if(x.country=="England"): num_e=num_e+1 if(x.country=="Scotland"): num_s=num_s+1 list_x=['Wales','England','Scotland'] #list to store the data of x-axis list_y=[num_w,num_e,num_s] #list to store the data of y-axis
plt.title("'Students from different Country'",fontdict={'fontname': 'Rockwell', 'fontsize':"18"}) #giving the title of the bargraph with resppective font and text size plt.xlabel('Country of Origin',fontdict={'fontname': 'Arial', 'fontsize':"12"}) # giving the title of x label "" "" "" plt.ylabel('No. of Students',fontdict={'fontname': 'Arial', 'fontsize':"12"}) # giving the title of y label "" "" "" #label=wales labels the bar as indicator plt.bar('Wales',num_w, fill=False, hatch='..',label='Wales') #giving specefic design to bar "wales" with patten hatch'..' plt.bar('England',num_e, fill=False, hatch='.O',label='England') #giving specefic design to bar "England" with patten hatch'.O' plt.bar('Scotland',num_s, fill=False, hatch='*', label='Scotland') #giving specefic design to bar "Scotland" with patten hatch'**' plt.legend() plt.xticks(rotation=10) #gives specefic tilt design to the bottom title of country plt.grid(color='#000000',alpha=1, linestyle='--', linewidth=0.5) #pattern drawn with style='--' with width 0.5 and choosing colour black as code #000000
plt.show() #this will input the bargraph #defining the mainmenu funciton to recall them with short code def mainFunction(rt): #printing mainmenu with parameter (+rt+) just for extra style when we call the funciton again print(' ' ) print("| _______________________________ |") print("| |Welcome "+rt+" to Sharad's Program| |") print("| '--------------------------------' |") print('||') print('') print(" 1. View details of list of Students") #printing the mainmenu option print(" 2. View details of the eldest and youngest student(s)") print(" 3. Option to add a new student and present a summary report") print(" 4. Search for the student on module output their details") print(" 5. Query the list to return students ordered in alphabetic order") print(" 6. Plot a labbelled bar chart of the students from each country") print(" 7. Exit") #(Userinput option from 1-7) userInput = input("Please make the selection from (1-7) to execute respective the task:") while(userInput): #(use of while loop with userinput condition)
if(int(userInput)==1): #excutes (student_details() & summary_report() ), if user input==1 student_detail_title()#function to print the title only student_details() #student_details() to print details of students summary_report() #summary_report() to print summary report print("") print("") print("") mainFunction("back") # calling back main function with new title text(+rt+ as back) elif(int(userInput)==2): #excutes (eldest_youngest(), if user input==2 eldest_youngest() #function to print the eldest and youngest student(s) print("") print("") mainFunction("back")# calling back main function with tect(+rt+ as back) elif(int(userInput)==3):#excutes (student_add(), if user input==3 student_add() #function to add the data and print summary report print("") mainFunction("back") # calling back main function with tect(+rt+ as back) print("") elif(int(userInput)==4):#excutes student_search() , if user input==3 student_search() #function 4 to search the student details using student's ID print("") mainFunction("back") # calling back main function with tect(+rt+ as back) print("") elif(int(userInput)==5):#excutes sortby_age(), if user input==5 sortby_age() print("") mainFunction("back") print("") elif(int(userInput)==6):#excutes student_add(), if user input==6 bargraph() #fucntion6() plots the bargraph mainFunction("back") # calling back main function with tect(+rt+ as back) if(int(userInput)==7): #breaks the while loop, if (userinput==7) break #break while loop else: print('Please Wait! Exiting Program') #exits the programs if (user input==7) break #breaks while loop with the exiting message
read_file() #This will read the file and store data in list of objects #Main Stars here_ try: #Using try except to excute error message mainFunction("") #mainmenu starts here except: #whenever program crashes, it will print this message and exit print("Either you made a mistake or gave wrong input") mainFunction("")