If I want to remove line breaks from a text file such as this:
hello
there
and I use a simple code like this:
with open['words.txt'] as text:
for line in text:
print [line.strip[]]
It outputs this:
hello
there
However, I want my code to output this:
hello
there
How can I do this? Thanks in advance.
asked Sep 5, 2014 at 10:51
2
add if line.strip[] == '': continue before your print statement.
answered Sep 5, 2014 at 10:59
CurdCurd
11.9k3 gold badges34 silver badges47 bronze badges
0
I see two ways to achieve what you want.
Reading line by line
with open['bla.txt'] as stream: for line in stream: # Empty lines will be ignored if line.strip[]: print[line]Reading all contents
import re with open['bla.txt'] as stream: contents = stream.read[] print re.sub['\s$', '', contents, flags=re.MULTILINE]
answered Sep 5, 2014 at 11:30
if its only linebreaks you want to
remove, you could use string.replace["\n", ""]
or if it only uses carraige returns instead of newlines [*nix] then string.replace["\r", ""]
James
answered Sep 5, 2014 at 10:57
James KentJames Kent
5,52323 silver badges48 bronze badges
You need to test if a line is empty or not to solve this.
with open['words.txt'] as text:
for line in text:
if line:
print [line.strip[]]
In python empty-strings are falsy. That is, an if-test on an empty string will be considered false.
answered Sep 5, 2014 at 11:01
EtseEtse
1,21515 silver badges27 bronze badges
- Unknown.PY
- December 28, 2021
The '\n' character represents the new line in python programming. However, this tutorial will show you various methods to remove the newlines from a text file.
Before starting, let us see the output of our file, which we want to remove all newlines from it.
# Open the file
my_file = open['my_file.txt', 'r']
# Read my_file with newlines character
output = repr[my_file.read[]]
# Output
print[output]
# Close the file
my_file.close[]Output:
'\nHello World\nHello Python\nHello Javascript\nNote: I've used the repr[] function to print the file's output with the '\n' character.
Now, let's get started.
Method #1: Remove newlines from a file using replace[]
the replace[] method replaces a specified phrase with another specified phrase. Therefore, we'll use this method to replace the newline character with a non-value.
Syntax
.replace['\n', '']Example
# Open the file
my_file = open['my_file.txt', 'r']
# File's output
o = my_file.read[]
# Remove all new lines from file
r_newlines = o.replace['\n', '']
# Result
print[r_newlines]
# Close the file
my_file.close[]Output:
Hello WorldHello PythonHello Javascriptmethod #2: Remove newlines from a file using splitlines[]
The splitlines[] method splits a string at the newline break and returns the result as a list.
However, we will use the splitlines[] to split the file's output at '\n' and the join[] method to join the result.
Syntax
"".join[file_output.splitlines[]]Example
# Open the file
my_file = open['my_file.txt', 'r']
# File's output
o = my_file.read[]
# Remove all new lines from the file.
r_newlines = "".join[o.splitlines[]]
# Result
print[r_newlines]
# Close the file
my_file.close[]Output:
Hello WorldHello PythonHello JavascriptMethod #3: Remove newlines from a file using Regex
We can also use the re.sub[] function to remove the newlines from a text file.
Syntax
re.sub['\n', '', output_file]The sub[] function works like replace[] function.
Example
import re
# Open the File
my_file = open['my_file.txt', 'r']
# File's output
o = my_file.read[]
# Remove all new lines from the file.
r_newlines = re.sub['\n', '', o]
# Result
print[r_newlines]
# Close the file
my_file.close[]Output:
Hello WorldHello PythonHello JavascriptConclusion
We've learned different methods to remove the newlines from a text file in this article. Moreover, if you want to remove the newlines from the beginning or end of the text file, you should use strip[] and rstrip[] methods.