read and write file in python

1file = open(“testfile.txt”,”w”) 
2 
3file.write(“Hello World”) 
4file.write(“This is our new text file”) 
5file.write(“and this is another line.”) 
6file.write(“Why? Because we can.”) 
7 
8file.close() 

1with open("file.txt", "r") as txt_file:
2  return txt_file.readlines()

1with open("hello.txt", "w") as f:
2	f.write("Hello World")
3#using With Statement files opened will be closed automatically

1f=open("Diabetes.txt",'r')
2f.read()

1with open(filename,"w") as f:
2  f.write('Hello World')

1#Write a Python program to create a file of numbers by taking input from the user and then display the content of the file. You can take input of non-zero numbers, with an appropriate prompt, from the user until the user enters a zero to create the file assuming that the numbers are non-zero.  
2    f = open ('NumFile.txt','w')
3    while True :
4        no = int(input("enter a number (0 for exit)"))
5        if no == 0 :
6            print("you entered zero(0) ....... \n now you are exit  !!!!!!!!!!!")
7            break
8        else :
9            f.write(str(no)+"\n")
10    f.close() 
11    f1 = open ('NumFile.txt','r')
12    print("\ncontent of file :: \n",f1.read())
13    f1.close()
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