Python close method:

The close is a method of IOBase class in Python that flush and close the current stream. However, this method has no effect if the file is already closed. After closing a file, any read or write operation will raise a ValueError exception.

Method Signature

The signature for the close method is as shown below.

fileObject.close()

Method parameters and return type

  • Here, the close method doesn’t take any parameters.
  • However, it doesn’t return any value.

Python close() Examples:

Example 1: In this example, we will open a file in reading mode and close it when a read operation is done.

# Open a file
f1 = open("test.txt", "r")
print ("File Name ", f1.name)
print(f1.read())
# Closing file
f1.close()

Output

File Name  test.txt
Hello, everyone
Welcome to the world of Python Programming.

Example 2: In this example, we will open a file in write mode and try to read the content after writing. This will not read data we have written due to buffering.

# Open a file
f1 = open("test1.txt", "w+")
print ("File Name ", f1.name)
#Writing to a file
f1.write("Hello Python")
#Trying to read
print(f1.read())
#Closing
fd1 = f1.close()

Output

File Name  test.txt

Example 3: In this example, we will write to a file and close it. Thereafter, we will open the same file for reading.

#Initializing 
# Open a file
f1 = open("test1.txt", "w")
print ("File Name ", f1.name)
#Writing to a file
f1.write("Hello Python")

#Closing a file
fd1 = f1.close()

#Opening again in read mode
f1 = open("test1.txt", "r")
print(f1.read())

#Closing a file
fd1 = f1.close()

Output

File Name  test.txt
Hello Python

Conclusion

Hence, the close() method flushes and closes the stream.

References

Happy Learning 🙂

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