Python File Handling Readfile, write to file, delete files , CRUD Files handling in python

open() is used to handle files

• "r" - Read - Default value. Opens a file for reading, error if the file does not exist
• "a" - Append - Opens a file for appending, creates the file if it does not exist
• "w" - Write - Opens a file for writing, creates the file if it does not exist
• "x" - Create - Creates the specified file, returns an error if the file exists
• "b" - Binary - Binary mode (e.g. images)
• "t" - Text - Default value. Text mode

1.Read Whole File

f = open("demofile.txt", "r") #"D:\\myfiles\welcome.txt"
print(f.read())

2. Read Part of file ie first 5 charters

print(f.read(5))

3. Read Line from file

f = open("demofile.txt", "r")
print(f.readline()) #read first line 
print(f.readline()) # read 2nd line

4. Read file line by line

f = open("demofile.txt", "r")
for x in f:
  print(x)

5.close file

f.close()

WRITE TO FILES

1. Append to file

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

It will open files and append the new content

2. overwrite to file

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

DELETE FILE

1. It will remove the file

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

2. check if file exist then delete it

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

3.Delete the folder

import os
os.rmdir("myfolder")