opening files and output of parsing

[leodavinci1990]

So I have the following text file named test.txt containing the following lines:

This is line 1.
This is line 2.
This is line 3.
The following code is used to parse the file:

testfile = open(r"C:\Users\Mohammad\Documents\test.txt")
result = [line for line in testfile if "2" in line]
print(result)

Output:
['This is line 2.\n']

How do I lose the \n. part in the output?

[bowlofred]

Usually you'll want to rstrip(), which by default removes any whitespace from the right end.

result = [line.rstrip() for line in testfile if "2" in line]

[leodavinci1990]

Usually you'll want to rstrip(), which by default removes any whitespace from the right end.

result = [line.rstrip() for line in testfile if "2" in line]

[leodavinci1990]

Usually you'll want to rstrip(), which by default removes any whitespace from the right end.

result = [line.rstrip() for line in testfile if "2" in line]

Follow-up questions:

1)How do I, instead of having to give the full path of the file in the open function, just use test.txt  ? In other words, how do I change the directory to the current directory where the Python file is currently being run from?
2) Why do I run into an error when opening the file using the following code:

f=open("C:\Users\Mohammad\Documents\test.txt", "r")
or
f=open("C:\Users\Mohammad\Documents\test.txt")

and why did putting an r before the filename in open(r"C:\Users\Mohammad\Documents\test.txt")
solve it?

[bowlofred]

1.  Go ahead and use "test.txt" and see if it works.  The current directory is the current directory of the shell that started the program (may or may not be where the python file is.)  If you run ".\foo.py", then the current directory is the same.  But if you run "otherdir\foo.py", then the current directory is above otherdir, not inside it.  You can change the current directory within the program, but you can't guarantee what it will be ahead of time.  

import os
print(os.getcwd())

C:\Temp>python subdir\printdir.py
C:\Temp

2.  Some python strings use backslash escape sequences.  As an example a newline is "\n" and a tab character is "\t".  The "r-string" turns off the backslash specials and just makes it a normal character.  When dealing with windows paths (and all the backslashes they have), turning off the "special" ones is easier than doubling all the backslashes.

>>> print("c:\new folder\timesheets")
c:
ew folder       imesheets
>>> print(r"c:\new folder\timesheets")
c:\new folder\timesheets