Python strip with \n [duplicate]

Answer 1

How about using a python regex pattern?

import re
f = open('test.txt', 'r')
strings = re.findall(r"\S+", f.read())

And for your case of line.strip() will not work because Python removes only the leading and trailing characters

From Python Docs - Return a copy of the string with leading and trailing characters removed. If chars is omitted or None, whitespace characters are removed. If given and not None, chars must be a string; the characters in the string will be stripped from the both ends of the string this method is called on.

Answer 2

The strip() method removes whitespace by default, so there is no need to call it with parameters like '\t' or '\n'. However, strings in Python are immutable and can't be modified, i.e. the line.strip() call will not change the line object. The result is a new string which is returned by the call.

As already mentioned, it would help if you posted an example from your input file. If there are more than one number on each line, strip() is not the function to use. Instead you should use split(), which is also a string method.

To conclude, assuming that each line contains several floats separated by whitespace, and that you want to build a list of all the numbers, you can try the following:

floats = []
with open(filename) as f:
    for line in f:
        floats.extend([float(number) for number in line.split()])

Answer 3

You should be able to use line.strip('\n') and line.strip('\t'). But these don't modify the line variable...they just return the string with the \n and \t stripped. So you'll have to do something like

line = line.strip('\n')
line = line.strip('\t')

That should work for removing from the start and end. If you have \n and \t in the middle of the string, you need to do

line = line.replace('\n','')
line = line.replace('\t','')

to replace the \n and \t with nothingness.

Answer 4

pythons csv library is good for this.

http://docs.python.org/library/csv.html

CSV = comma seperated values, but if you set the delimiter = \t, then it works for tab separated values too.

Answer 5

You can use:

mylist = []
# Assuming that you have loaded data into a lines variable. 
for line in lines:
    mylist.append(line.strip().split('\t')

to get a python list with only the field values for all the lines of data.

Answer 6

Often, depending on the way you read the lines, in order to get rid of \n from myline, you can take myline[:-1] since \n is the last character of myline.

For the '\t' you can use replace() or strip()