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How can I check if a string contains only printable characters and newlines in Python using regular expressions?
Antek N

To check if a string contains only printable characters and newlines in Python using regular expressions, you can follow these steps: 1. Import the necessary module: - Import there module, which provides regular expression functionality in Python. - Example:

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import re

2. Check the string using regular expressions: - Create a regular expression pattern that matches printable characters and newlines. - Use there.fullmatch() function to check if the entire string matches the pattern. - The pattern should match any printable character and newline character. - Example:

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def contains_only_printable_and_newlines(string):
    pattern = r'^[ -~\t\n]+$'
    return bool(re.fullmatch(pattern, string))

3. Use the function: - Call thecontains_only_printable_and_newlines() function and pass the string you want to validate. - It will returnTrue if the string contains only printable characters and newlines, andFalse otherwise. - Example:

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string = "Hello, World!\n"
if contains_only_printable_and_newlines(string):
    print("Valid string")
else:
    print("Invalid string")

By using regular expressions and there.fullmatch() function, you can efficiently check if a string contains only printable characters and newlines. The regular expression pattern[ -~\t\n] matches any printable character and the newline character\n. The^ and$ anchors ensure that the entire string matches the pattern.

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