CODEWITHSUNDEEP
python
user11579493
user11579493

Reputation: 3

Getting the Paragraphs out of a txt-file without the empty lines

So, I have a Text-File and I want to print out just the Paragraphs of that File. My code seems to be working, but everytime when there is a empty line in the txt-file, my Output shows me "None". I understand it has something to do with the return statement, but I really dont get where my mistake is Here is my Code:

class ByParagraph:
    def __init__(self,iterable):
        self.iterable = iterable
    def __iter__(self):
        return self
    def __next__(self):
        for line in self.iterable:
            if line.isspace():
                break
            else:
                return "".join(line.rstrip())
        else:
            raise StopIteration()




with open("example.txt") as f:
    for p in ByParagraph(f):
        print(p)

Here is the output:

None
This is an a sentence.
None
This is another sentence.
Followed by yet another one.
None
None
This is not the last sentence.
This one neither.
None
None
None
This one is the last one.

And it should look like this

This is an a sentence.
This is another sentence. Followed by yet another one.
This is not the last sentence. This one neither.
This one is the last one.

I was expecting to get an Output without the "none" Statements.

Upvotes: 0

Views: 45

Answers (2)

shan
shan

Reputation: 3

In the __init__ function, you can add some logic to automatically remove empty lines, like so:

def __init__(self,iterable):
    iterable=iterable.split('\n')
    while '' in iterable:
       iterable.remove('')
    new_iterable=''
    for i in iterable:
        new_iterable+=i
    self.iterable=new_iterable+'\n'

Upvotes: 0

user3190635
user3190635

Reputation: 41

You can use the filter() function on text.splitlines() to remove empty lines and the result is joined back with newline separator:

lines = filter(lambda x: x.strip() != "", text.splitlines())
text = "\n".join(lines)

Hope this helps.

Upvotes: 1

Related Questions