So I am making a program that takes a text file, breaks it into words, then writes the list to a new text file.
The issue I am having is I need the strings in the list to be with double quotes not single quotes.
For example
I get this ['dog','cat','fish'] when I want this ["dog","cat","fish"]
Here is my code
with open('input.txt') as f:file = f.readlines()nonewline = []for x in file:nonewline.append(x[:-1])words = []for x in nonewline:words = words + x.split()textfile = open('output.txt','w')textfile.write(str(words))I am new to python and haven't found anything about this.Anyone know how to solve this?
[Edit: I forgot to mention that i was using the output in an arduino project that required the list to have double quotes.]
Best Answer
You cannot change how str works for list.
How about using JSON format which use " for strings.
>>> animals = ['dog','cat','fish']>>> print(str(animals))['dog', 'cat', 'fish']>>> import json>>> print(json.dumps(animals))["dog", "cat", "fish"]import json...textfile.write(json.dumps(words))In Python, there are multiple ways to replace single quotes with double quotes. One approach is to use the replace() method. This method allows you to replace a specific character or substring with another character or substring. To replace single quotes with double quotes, you can simply use replace("'", '"'). Here's an example:
text = 'This is a sample text with single quotes'
new_text = text.replace("'", '"')
This will replace all the single quotes in text with double quotes, resulting in 'This is a sample text with double quotes'.
Another approach is to use regular expressions. You can import the re module and use the sub() function to perform the replacement. Here's an example:
import re
text = 'This is a sample text with single quotes'
new_text = re.sub("'", '"', text)
Both methods will give you the same result. Choose the one that suits your needs and coding style.
Most likely you'll want to just replace the single quotes with double quotes in your output by replacing them:
str(words).replace("'", '"')You could also extend Python's str type and wrap your strings with the new type changing the __repr__() method to use double quotes instead of single. It's better to be simpler and more explicit with the code above, though.
class str2(str):def __repr__(self):# Allow str.__repr__() to do the hard work, then# remove the outer two characters, single quotes,# and replace them with double quotes.return ''.join(('"', super().__repr__()[1:-1], '"'))>>> "apple"'apple'>>> class str2(str):... def __repr__(self):... return ''.join(('"', super().__repr__()[1:-1], '"'))...>>> str2("apple")"apple">>> str2('apple')"apple"In Python, double quote and single quote are the same. There's no different between them. And there's no point to replace a single quote with a double quote and vice versa:
2.4.1. String and Bytes literals
...In plain English: Both types of literals can be enclosed in matching single quotes (') or double quotes ("). They can also be enclosed in matching groups of three single or double quotes (these are generally referred to as triple-quoted strings). The backslash () character is used to escape characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character...
"The issue I am having is I need the strings in the list to be with double quotes not single quotes." - Then you need to make your program accept single quotes, not trying to replace single quotes with double quotes.