How to read a text file into a string variable and strip newlines?

You could use:

with open('data.txt', 'r') as file:
    data = file.read().replace('\n', '')

Or if the file content is guaranteed to be one-line

with open('data.txt', 'r') as file:
    data = file.read().rstrip()

In Python 3.5 or later, using pathlib you can copy text file contents into a variable and close the file in one line:

from pathlib import Path
txt = Path('data.txt').read_text()

and then you can use str.replace to remove the newlines:

txt = txt.replace('\n', '')

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