How to set read and write position in a file in Python?

You can use the seek(offset[, whence]) method. It sets the file's current position, like stdio's fseek(). The whence argument is optional and defaults to 0 (absolute file positioning); other values are 1 (seek relative to the current position) and 2 (seek relative to the file's end). For example, if there is a file called my_file with text Hello\nworld, and you want to move just before the first l, you can use:

f = open('my_file', 'r')
f.seek(2)
f.close()

This will seek the pointer to just before the first l.

Rajendra Dharmkar

Updated on 01-Oct-2019 11:45:00

• Related Questions & Answers
• How to use seek() method to reset a file read/write position in Python?
• How to open a file in read and write mode with Python?
• How to read and write a file using Javascript?
• How to open a binary file in read and write mode with Python?
• Read and Write to an excel file using Python openpyxl module
• Read/Write structure to a file using C
• How to read a text file in Python?
• Write a C program to read a data from file and display
• How to read CSV file in Python?
• How to read JSON file in Python
• How to read/write data from/to .properties file in Java?
• Write a Python program to read an Excel data from file and read all rows of first and last columns
• Read/Write Class Objects from/to File in C++
• How to open a file just to read in python?
• How to open a file to write in Python?