Basically, I’m asking the user to input a string of text into the console, but the string is very long and includes many line breaks. How would I take the user’s string and delete all line breaks to make it a single line of text. My method for acquiring the string is very simple.
string = raw_input("Please enter string: ")
Is there a different way I should be grabbing the string from the user? I’m running Python 2.7.4 on a Mac.
P.S. Clearly I’m a noob, so even if a solution isn’t the most efficient, the one that uses the most simple syntax would be appreciated.
Answers:
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Method 1
How do you enter line breaks with raw_input? But, once you have a string with some characters in it you want to get rid of, just replace them.
>>> mystr = raw_input('please enter string: ')
please enter string: hello world, how do i enter line breaks?
>>> # pressing enter didn't work...
...
>>> mystr
'hello world, how do i enter line breaks?'
>>> mystr.replace(' ', '')
'helloworld,howdoienterlinebreaks?'
>>>
In the example above, I replaced all spaces. The string 'n' represents newlines. And r represents carriage returns (if you’re on windows, you might be getting these and a second replace will handle them for you!).
basically:
# you probably want to use a space ' ' to replace `n`
mystring = mystring.replace('n', ' ').replace('r', '')
Note also, that it is a bad idea to call your variable string, as this shadows the module string. Another name I’d avoid but would love to use sometimes: file. For the same reason.
Method 2
You can try using string replace:
string = string.replace('r', '').replace('n', '')
Method 3
You can split the string with no separator arg, which will treat consecutive whitespace as a single separator (including newlines and tabs). Then join using a space:
In : " ".join("nnsome text rn with multiple whitespace".split())
Out: 'some text with multiple whitespace'
https://docs.python.org/2/library/stdtypes.html#str.split
Method 4
The canonic answer, in Python, would be :
s = ''.join(s.splitlines())
It splits the string into lines (letting Python doing it according to its own best practices). Then you merge it. Two possibilities here:
- replace the newline by a whitespace (
' '.join()) - or without a whitespace (
''.join())
Method 5
updated based on Xbello comment:
string = my_string.rstrip('rn')
read more here
Method 6
Another option is regex:
>>> import re
>>> re.sub("n|r", "", "Foonrbarnrbaznr")
'Foobarbaz'
Method 7
If anybody decides to use replace, you should try r'n' instead 'n'
mystring = mystring.replace(r'n', ' ').replace(r'r', '')
Method 8
A method taking into consideration
- additional white characters at the beginning/end of string
- additional white characters at the beginning/end of every line
- various end-line characters
it takes such a multi-line string which may be messy e.g.
test_str = 'nhej ho n aaarn an '
and produces nice one-line string
>>> ' '.join([line.strip() for line in test_str.strip().splitlines()]) 'hej ho aaa a'
UPDATE:
To fix multiple new-line character producing redundant spaces:
' '.join([line.strip() for line in test_str.strip().splitlines() if line.strip()])
This works for the following too
test_str = 'nhej ho n aaarnnnnn an '
Method 9
The problem with rstrip is that it does not work in all cases (as I myself have seen few). Instead you can use –
text= text.replace(“n”,” “)
this will remove all new line n with a space.
Thanks in advance guys for your upvotes.
Method 10
Regular expressions is the fastest way to do this
s='''some kind of string with a bunchr of extra spaces in it''' re.sub(r's(?=s)','',re.sub(r's',' ',s))
result:
'some kind of string with a bunch of extra spaces in it'
Method 11
You can use
string= string.replace("n", str())
However, sometimes it
says
NoneType object has no attribute 'replace'
Thus, you shall be careful doing it.
But thanks for asking about this
raw_ input !
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0