Python File Handling Operations

Python Handling Files:

Python Read Files:

demofile.txt

Hello! Welcome to demofile.txt
This file is for testing purposes.
Good Luck!

f = open("demofile.txt", "r")
print(f.read())

C:\Users\My Name>python demo_file_open.py
Hello! Welcome to demofile.txt
This file is for testing purposes.
Good Luck!

f = open("demofile.txt", "r")
print(f.read(5))

Hello

Python write/create files:

f = open("demofile2.txt", "a")
f.write("Now the file has more content!")
f.close()

#open and read the file after the appending:
f = open("demofile2.txt", "r")
print(f.read())

Hello! Welcome to demofile2.txt
This file is for testing purposes.
Good Luck!Now the file has more content!

f = open("demofile3.txt", "w")
f.write("Woops! I have deleted the content!")
f.close()

#open and read the file after the appending:
f = open("demofile3.txt", "r")
print(f.read())

Woops! I have deleted the content!

f = open("myfile.txt", "x")

f = open("myfile.txt", "w")

Python Delete Files:

import os
os.remove("demofile.txt")

import os
if os.path.exists("demofile.txt"):
  os.remove("demofile.txt")
else:
  print("The file does not exist")

import os
os.rmdir("myfolder")

Advanced ile Method Python Operations:

close() Closes the file

f = open("demofile.txt", "r")

print(f.read())

f.close()

I love you God

I really love you

fileno() Returns a number that represents the stream, from the operating system's perspective

f = open("demofile.txt", "r")

print(f.fileno())

5

flush() Flushes the internal buffer

f = open("myfile.txt", "a")

f.write("Now the file has one more line!")

f.flush()

f.write("...and another one!")

Now the file has one more line!

isatty() Returns whether the file stream is interactive or not

f = open("demofile.txt", "r")
print(f.isatty())

True

read() Returns the file content

f = open("demofile.txt", "r")

print(f.read())

I love you God

I really love you

f = open("demofile.txt", "r")

print(f.read(33))

I love you suhirtha

I really love

readable() Returns whether the file stream can be read or not

f = open("demofile.txt", "r")

print(f.readable())

True

readline() Returns one line from the file

f = open("demofile.txt", "r")

print(f.readline())

I love you suhirtha

f = open("demofile.txt", "r")

print(f.readline())

print(f.readline())

I love you suhirtha

I really love you

f = open("demofile.txt", "r")

print(f.readline(5))

I lov

readlines() Returns a list of lines from the file

f = open("demofile.txt", "r")

print(f.readlines())

['I love you suhirtha\n', 'I really love you']

seek() Change the file position

f = open("demofile.txt", "r")

f.seek(4)

print(f.readline())

ve you suhirtha

seekable() Returns whether the file allows us to change the file position

f = open("demofile.txt", "r")

print(f.seekable())

True

tell() Returns the current file position

f = open("demofile.txt", "r")

print(f.tell())

0

f = open("demofile.txt", "r")

print(f.readline())

print(f.tell())

I love you suhirtha

20

truncate() Resizes the file to a specified size

f = open("demofile2.txt", "a")

f.truncate(20)

f.close()

#open and read the file after the truncate:

f = open("demofile2.txt", "r")

print(f.read())

writeable() Returns whether the file can be written to or not

f = open("demofile.txt", "a")

print(f.writable())

True

write() Writes the specified string to the file

f = open("demofile2.txt", "a")

f.write("See you soon!")

f.close()

#open and read the file after the appending:

f = open("demofile2.txt", "r")

print(f.read())

See you soon!

writelines() Writes a list of strings to the file

f = open("demofile3.txt", "a")

f.writelines(["See you soon!", "\nOver and out."])

f.close()

#open and read the file after the appending:

f = open("demofile3.txt", "r")

print(f.read())

See you soon!Over and out