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Differentiate between "w" and "r" file modes used in Python while opening a data file. Illustrate the difference using suitable examples.

Python File Handling

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Answer

"w" mode"r" mode
It is also called as write mode.It is also called as read mode.
The "w" mode is used to open a file for writing.The "r" mode is used to open a file for reading.
It creates a new file if the file does not exist.If the file does not exist, it raises a FileNotFoundError.
If the file exists, Python will truncate existing data and over-write in the file.If the file exists, Python will open it for reading and allow to access its contents.
Example:
with open("example.txt", "w") as file:
file.write("Hello, world!\n")		Example:
with open("example.txt", "r") as file:
data = file.read()
print(data)

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