Python Binary File operation Record Append,Display and Search Operation Program and Practice

In [6]:

def stdentry(r,nam,c):# function to write a reord in file 'std.dat'
    
    import pickle
    f=open('std.bat','ab')
    pickle.dump([r,nam,c],f)
    f.close()

    
    

In [7]:

stdentry(1,'anukrati',12) #calling stdentry

In [8]:

stdentry(2,'prachi',12)   #calling stdentry

In [9]:

stdentry(3,'agam',12)    #calling stdentry

In [16]:

def stdshow():   # function designed for displaying all record of file std.bat
    f=open('std.bat','rb')
    import pickle
    
    f.seek(0,2)
    eof=f.tell()
    f.seek(0,0)
    while(f.tell()<eof):
        d=pickle.load(f)
        print(d)
    f.close()
    

In [17]:

stdshow()   #calling stdshow() to display all record 

[1, 'anukrati', 12]
[2, 'prachi', 12]
[3, 'agam', 12]

In [18]:

stdshow()    #calling stdshow() to display all record 

[1, 'anukrati', 12]
[2, 'prachi', 12]
[3, 'agam', 12]

In [19]:

stdentry(4,'sonu',12)    #calling stdshow() to display all record 

In [20]:

stdshow()    #calling stdshow() to display all record 

[1, 'anukrati', 12]
[2, 'prachi', 12]
[3, 'agam', 12]
[4, 'sonu', 12]

In [21]:

def stdsearchnam(nam):  # writing function for searching record by name 
    f=open('std.bat','rb')
    import pickle
    
    f.seek(0,2)
    eof=f.tell()
    f.seek(0,0)
    while(f.tell()<eof):
        d=pickle.load(f)
        if(d[1]==nam):
            print('my name is',d[1],'my rollno is',d[0],'and my class is',d[2])
        
    f.close()
    

In [22]:

stdsearchnam('sonu')  #calling of function for search in file by name sonu

my name is sonu my rollno is 4 and my class is 12

In [24]:

stdsearchnam('agam')  #calling of function for search in file by name agam

my name is agam my rollno is 3 and my class is 12

In [25]:

stdsearchnam('prachi')  #calling of function for search in file by name prachi

my name is prachi my rollno is 2 and my class is 12

In [37]:

def stdsearchnam(nam,nam1):
    f=open('std.bat','rb+')
    import pickle
    
    f.seek(0,2)
    eof=f.tell()
    f.seek(0,0)
    while(f.tell()<eof):
        p=f.tell()
        d=pickle.load(f)
        if(d[1]==nam):
            d=[d[0],nam1,d[2]]
            f.seek(p,0)
            pickle.dump(d,f)
        
    f.close()
    

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