Python Class 12 Computer Science Important Practicals Programs (CBSE and Other Boards) P.S. You Ask for Other Programs Too :-)

PYTHON File Handling Operations.py

#Opening with 'WITH' method
with open('boi.txt','w') as f:
    #Write mode can create file

    #As long as code is written in this block
    #There is no need to Close File
    #File will be automatically closed for
    #code out of this block.
    f.writelines(['This Function\n',
                  'Takes Argument or Input\n',
                  'in List Like This'])
    #Now Text Is Written in File Next code should be out of this
    #Block to close file.

#Opening File again to read with
#"Primitive File Open Statement"
f=open('boi.txt','r')
#Read Mode Cant Create File
#Opened as 'f' variable

file=f.read()
#Storing Data read on Variable 'file'
print(file)

f.close()
#Closed File on Variable 'f'

#1 Read()-> reads whole file as string
#2 Readline()-> reads a line as string
#3 Readlines()-> reads whole file with wast lines as elements of list.

    #Author: Tazer

Stack or List Operations.py

stack=[] #Defining Empty Stack
while True: # For a never ending loop
    print('''
Enter the Number from below:-
1)Add Value to Stack
2)Remove Value From Stack
3)Display Stack

Enter to Exit
''')
    x=input('==>')
    if x=='':
        break
    elif x=='1':
        value=input('Enter Value to ADD:')
        stack.append(value)
        print(value,'added to stack Successfully')
    elif x=='2':
        z=input('1)Remove by INDEX Value\n 2)Remove by Element Value\n ==>')
        if z=='1':
            index=int(input('Enter INDEX:'))
            print('Element Removed=',stack.pop(index))
        elif z=='2':
            element=input('Enter ELEMENT:')
            stack.remove(element)
        else:
            print('Some Error Occured.')
    elif x=='3':
        print('Stack:',stack)
    else:
        print('Enter Only From the Given Options')

    #Author: Tazer

Word Counter From Text File.py

def Counter(file_path,word):
    count=0
    with open(file_path,'r') as f:
        for line in f:
            list_of_words=line.split()
            for text in list_of_words:
                if text==word:
                    count+=1
    return count


print('Number of Times "to" occured:',Counter('SampleText.txt','to'))
print('Number of Times "the" occured:',Counter('SampleText.txt','the'))


    #Author: Tazer