To Write File in python you must rely on the built-in open() function. Open function is an inbuilt method, you don’t need to add the extra library. In this tutorial, you will learn how to python write a file in detail.
How to Python Write File?
In order to open an existing file and write it, you will need to use a python in build method (function)
Open to get a file object. The file object has a function and attributes to data/content write and update etc.
Where file_obj is a variable to hold file object. The mode argument is required ‘w’ because the default value of ‘r’ will be assumed if it is omitted. Where ‘w ‘value stands for write mode.
file_obj = open("filename", "mode")
# write text into file
‘r’– Read mode Open text file for reading (default option) in open function. The stream is positioned at the beginning of the file.
‘w’– Write mode (Edit and write new data into the file). The stream is positioned at the beginning of the file.
‘a’– Appending mode Open for writing. The file is created if it does not exist. The stream is positioned at the end of the file.
‘r+’– Read and write mode Open for reading and writing. The stream is positioned at the beginning of the file.
Assume we have the empty “testFile.txt” file, located in the same folder as Python.
Now writing the file.
‘w’ – Write mode
f = open("testFile.txt", "w")
Output: in the text file
Writing the file.
‘a’ – Appending mode
f = open("testFile.txt", "a")
f.write(" Appending mode")
For a complete tutorial in detail must read Append File On Existing File.
Python File Handling Quiz
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Python File Handling to test your knowledge – ( Create, Open, Update, delete and more about in Python)
It’s for Beginners, Advanced and Experienced Programmers.
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Question 1 of 10
Which of the following command is used to open a file “c:\textFile.txt” in read-mode only?Correct
Question 2 of 10
Which functions use to check if a file exists?
File name = “logo”Correct
Question 3 of 10
How do you insert something on a new line in a file?Correct
Question 4 of 10
Appending to a file means adding extra data into the file.Correct
Question 5 of 10
What is the last action that must be performed on a file?Correct
Question 6 of 10
What is the data type of data read from a file?Correct
Question 7 of 10
Can you create a file without using file modes in Python?Correct
Question 8 of 10
Reading from a file often involves using…Correct
Question 9 of 10
Which of the following statements are true regarding the opening modes of a file?Correct
Question 10 of 10
Which of the following commands option right to read the entire contents of a file as a string using the file object
Do comment if you have any doubt and question on this tutorial.
Note : This example (Project) is developed in PyCharm 2018.2 (Community Edition)
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
All Examples of Python Write to File OR Text File are in Python 3, so it may change its different from python 2 or upgraded versions.