Question

use python IDEL

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Problem 2 Files. Since almost all data can be stored in files, knowing how to use files in programs is invaluable. Today you will practice with opening a file for reading, writing and editing using the Python interpreter. Do not type messages in red into Python shell

$Question 14 0.5 pts create a new file mytext.txt for >>>f1 = open(mytest.txt,w+) writing & reading >>>f1.write(hello\n)$

Answer 1

Question 14:

f1=open("mytest.txt","w+")
f1.write("hello\n") #writes hello into file
for i in range(5):
f1.write(str(i)+"\n") #writes 1 2 3 4 5 into file
f1.readlines()
f1.close()

ANSWER: Prints nothing to screen

Question 15:

f1=open("mytest.txt","r")
for line in f1:
print(line.strip(),end=";") #strips lines and each line ends with ;
f1.close()

ANSWER:

hello;0;1;2;3;4;

Question 16:

f1=open("mytest.txt","r+")
f1.readlines()
f1.close()

ANSWER:

Prints nothing to the screen

Question 17:

f1.write("hello again\n")
f1.readlines()

ANSWER:

Prints nothing to screen

Adds hello again to end of file

Question 18:

f1.seek(0,0)

f1.readlines()

ANSWER:

prints nothing to screen
Question 19:

f1.seek(0,0)
for line in f1:
print(line.strip(),end=";") #strips lines add ; to each line
f1.readlines() #just reads lines prints nothing to screen

ANSWER:

hello;0;1;2;3;4;hello again;

mytest.txt

hello
0
1
2
3
4
hello again