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

Posted on by Dominique Stacey

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

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 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 search for a line in a text file in Python?

Algorithm is as follows,

  1. Accept arguments – file path and a string to lookup.
  2. Create an empty list of tuples.
  3. Open the file at the given path in read-only mode.
  4. Iterates over each line in the file one by one. For each line, check if it contains the given string or not. If the line contains the given string,

How do I read a specific line in a file?

Steps To Read Specific Lines From A File

  1. Open file in Read Mode. To open a file pass file path and access mode r to the open() function.
  2. Create a list to store line numbers.
  3. Create a list to store lines.
  4. Use for loop with enumerate() function to get a line and its number.
  5. Read file by line number.

How do I read the first 10 lines of a file in Python?

Use file. readline() to print the first n lines of a file

  1. a_file = open(“file_name.txt”) Open “file_name.txt”
  2. number_of_lines = 3.
  3. for i in range(number_of_lines): Print the first number_of_lines lines of a_file.
  4. line = a_file. readline()
  5. print(line)

How do you read multiple lines in a text file in Python?

To read multiple lines, call readline() multiple times. The built-in readline() method return one line at a time. To read multiple lines, call readline() multiple times.

How do you check if a word is in a file python?

“how to check if a string is in a text file python” Code Answer’s

  1. file = open(“search.txt”)
  2. print(file. read())
  3. search_word = input(“enter a word you want to search in file: “)
  4. if(search_word in file. read()):
  5. print(“word found”)
  6. else:
  7. print(“word not found”)

How do you print a single line in Python?

How to print the first n lines of a file in Python

  1. a_file = open(“file_name.txt”) Open “file_name.txt”
  2. number_of_lines = 3.
  3. for i in range(number_of_lines): Print the first number_of_lines lines of a_file.
  4. line = a_file. readline()
  5. print(line)

How do you read the first line in Python?

  1. Use the read() Function to Read the First Line of a File in Python.
  2. Use the readline() Function to Read the First Line of File in Python.
  3. Use the readlines() Function to Read the First Line of a File in Python.
  4. Use the next() Function to Read the First Line of a File in Python.
  5. Related Article – Python File.

How do you read two lines at once in Python?

The built-in readline() method return one line at a time. To read multiple lines, call readline() multiple times. The built-in readline() method return one line at a time. To read multiple lines, call readline() multiple times.

How to read the first line of a file in Python?

How to read only the first line of a file with Python? To read only the first line of a file, open the file in read mode and call readline method on the file object. For example, The above code reads first line from my_file.txt and prints to stdout.

How to delete particular line from file in Python?

Accept original file name and line number as an argument

  • Open original file in read mode
  • Create a temporary file and open that in write mode
  • then skip

    • How do you write a file in Python?

    Write file. Python supports writing files by default, no special modules are required. You can write a file using the .write() method with a parameter containing text data. Before writing data to a file, call the open(filename,’w’) function where filename contains either the filename or the path to the filename.

    What is open in Python?

    Python open() The open() function opens the file (if possible) and returns a corresponding file object.