How do I check if a string starts with a specific prefix in Python?

Determining String Prefix in Python

In this inquiry, we explore ways to verify if a string commences with a specific sequence in Python. This is analogous to the bash command: [[ "$string" =~ ^hello ]], which tests if a string starts with "hello".

Python Implementation

Python offers the startswith() method to perform such checks. It takes one argument, a substring, and returns a boolean indicating whether the original string begins with that substring.

Consider the following example:

<code class="python">aString = "hello world"
print(aString.startswith("hello"))  # Output: True</code>

In this example, aString starts with "hello," so startswith("hello") returns True.

Additional Considerations

The startswith() method is case-sensitive. If you need a case-insensitive comparison, use:

<code class="python">aString.lower().startswith("hello")  # Converts the string to lowercase before checking</code>

For more comprehensive string manipulation options, see the Python documentation on string methods.

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