Computer science – Mr.Python

♤Write Method

Today,we are going to see how to write in python file. Write in file uses “w”. Syntax of write method. file.write(),write take one display statement.

■■greeting.py

"Hello, world!"
________________________


So,question is how we will do it ?

1.Open the file.
2.Read the file.
3.Close the file.
4.Open the file in write 
  Mode.
5.use write method.
6.Inside write method, 
  Whatever content we     
  want to write. 
________________________
________________________
Note: Write method      
      Overwrite the          
      file. The old content will erased.
________________________
________________________

■■display.py

f = open("greeting.py",   
         "r")

with open("greeting.py")    
     as f:
     print(f.read())
f.close()


f = open("greeting.py",
         "w")
with open("greeting.py")
     as f:
     print(f.write("Good
           ","morning")
      

Output:

Good,morning

♧append method :

Append method in a file add content to file. Open the file in append mode.

■■Hello.py

"Hello,world ! "

■■go.py
# open the file in        
# append mode.

f = open("Hello.py","a")
f.append(" Bob and Alice.")

print(f)

Output :

Hello,world Bob and Alice.

________________________

Note: Append method add   
      the content in existing file content. 
________________________

file.py

1)file_o=open("tesla.py","r")

2)with open("tesla.py")
as file_o:
con = file_o.read()
print(con)

This code open the tesla.py file and read the file.
We have to close the file properly. Because, it can lose some data. We use:

3)file_o.close()

Open this file and read the content.

file_reader.py

# store the file name
file_o = "pi_digits.py"

with open("pi_digits.py") as
file_o:
con = file_o.read()
print(con)

Output ■■

3.1434756892380537685783

Mr.Python

Tag: Computer science

Working with Files

♤♧Working with files in Python ♧♤