Problem Formulation
Given the path to a text file such as /path/to/file.txt
.
How to read all the content from the file and print it to the Python standard output?
Standard File Reading and Printing
The standard approach to read the contents from a file and print them to the standard output works in four steps:
- Open the file.
- Read the content.
- Print the content.
- Close the file.
Let’s dive into each of those four steps next.
Here’s how this whole process looks like on my computer:
Step 1: Open the file for reading using the built-in open()
function with the text file path as the first string argument and the reading mode 'r'
as the second argument. Assign the resulting file object to a variable (e.g., named f
).
f = open('/path/to/file.txt', 'r')
Step 2: Read the whole textual content from the file using the file.read()
method and store it in a variable (e.g., named content
). If your file consists of multiple lines, the resulting string will contain newline characters '\n'
for each line break.
content = f.read()
Step 3: Print the file content by passing the content variable into the built-in print()
function.
print(content)
Step 4: Close the file to clean up your code. This is a good practice according to the Python standard.
f.close()
Taken together, the proper code to read the contents of a text file and print it to the standard output looks like this:
f = open('/path/to/file.txt', 'r') content = f.read() print(content) f.close()
Please note that you need to replace the string '/path/to/file.txt'
with your own path to the file you want to read.
Do you need some more background? No problem, watch my in-depth tutorial about Python’s open()
function:
How to Read all Lines of a File into a List (One-Liner)?
You can also read all lines of a file into a list using only a single line of code:
print([line.strip() for line in open("file.txt")])
To learn how this works, visit my in-depth blog article or watch the following video tutorial:
How to Read a File Line-By-Line and Store Into a List?
A more conservative, and more readable approach of achieving this is given in the following code snippet:
with open('file.txt') as f: content = f.readlines() # Remove whitespace characters like '\n' at the end of each line lines = [x.strip() for x in content] print(lines)
You can see this in action in this blog tutorial and the following video guide:
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