How do I get python to read a specific line in a text file?

How to read specific lines of a text file in Python

1. a_file = open(“test_file.txt”)
2. lines_to_read = [0, 2]
3. for position, line in enumerate(a_file): Iterate over each line and its index.
4. if position in lines_to_read:
5. print(line)

How do I read a specific line in Python 3?

Use readlines() to Read the range of line from the File The readlines() method reads all lines from a file and stores it in a list. You can use an index number as a line number to extract a set of lines from it. This is the most straightforward way to read a specific line from a file in Python.

How do I read a specific line in a csv file in Python?

How did it work?

1. Open the file ‘students. csv’ in read mode and create a file object.
2. Create a reader object (iterator) by passing file object in csv. reader() function.
3. Now once we have this reader object, which is an iterator, then use this iterator with for loop to read individual rows of the csv as list of values.

How do you edit a specific line in a file python?

Use file. readlines() to edit a specific line in text file Use open(file, mode) with file as the pathname of the file and mode as “r” to open the file for reading. Call file. readlines() to get a list containing each line in the opened file . Use list indexing to edit the line at a certain line number.

How do I extract the second row of a text file?

Ataul

1. Ataul. Answered On : May 20th, 2015.
2. Code. head -2 filename | tail -1. Similarly to get the 2nd last line, the order will be reversed that is. tail -2 filename | head -1.

How do I print a specific line using sed?

Printing Operation in Sed Linux Sed command allows you to print only specific lines based on the line number or pattern matches. “p” is a command for printing the data from the pattern buffer. To suppress automatic printing of pattern space use -n command with sed.

How do you extract a string from text in Python?

Extract Substring Using String Slicing in Python

1. [:] -> Returns the whole string.
2. [4 : ] -> Returns a substring starting from index 4 till the last index.
3. [ : 8] -> Returns a substring starting from index 0 till index 7 .
4. [2 : 7] -> Returns a substring starting from index 2 till index 6 .