Python Binary File Program Solution from Sumita Arora Text Book Question 's

1.Write dictionary into a binary file

import pickle

d={'python':90,'java':80,'C++':85}

f=open('abc.dat','wb')   # open binary file in write mode 

pickle.dump(d,f)  # dump d into f

f.close()

2. Read dictionary from  a binary file

import pickle  

f=open('abc.dat','rb')   # rb read binary file mode as rb

dic=pickle.load(f)  #Read object from a pickle file or binary file

f.close()

print(dic)

3. Writing and reading integers from binary file

import pickle  

f=open('numbers.dat','wb')

n=int(input("how many number you want to enter?"))

for i in range(n):

    x=int(input("enter number\n"))

    pickle.dump(x,f)

f.close()

f=open('numbers.dat','rb')

for i in range(n):

    y=pickle.load(f)  #Read object from a pickle file or binary file

    print(y)

f.close()

4. Writing List in binary file
import pickle

list=[1,2,3,4,5,6,7,8,9,10]

f=open('abc.dat','wb')

pickle.dump(list,f)  # dump list into f

f.close()

5. Write employee name and salary into binary file

import pickle
f=open('emp.dat','wb')
n=int(input("Enter no of employees\n"))
d={}
i=1
while i<=n:
              name=input("Enter name")
              salary=int(input("Enter salary"))
              d[name]=salary
              i=i+1

pickle.dump(d,f)  # dump d into f
f.close()

6. Reading employ name and salary where salary greater then 4000 from binary file emp.dat
import pickle
f=open("emp.dat","rb")
rd=pickle.load(f)
for key,value in rd.items():
              if(value>4000):

                            print(key,":",value)