Extract a subsequence starting at index 1 and continuing to the end of the sequence.

Indicates the intention to skip the first element of a sequence.

Used when the first element is a header or metadata to be ignored, e.g., processing CSV rows after the header.

Applicable to any sliceable Python sequence such as strings, lists, tuples, arrays, or custom sequences.

<sequence>[1:]

<sequence>[start:] where start = 1

<sequence>: any sliceable object; start index can be any integer (here fixed to 1)

• list
• string
• tuple
• numpy array
• pandas Series

• Start index can be omitted (defaults to 0) or any integer
• stop omitted defaults to end
• step omitted defaults to 1.

Confusing t[1:] with t[:1] (first element only); forgetting that omitted stop means to the end; misinterpreting step.

t[:1] (first element only), t[:] (shallow copy), t[::-1] (reverse), t[2:] (skip first two).

May be confused with substring indexing in other languages where syntax differs; ensure the object supports slicing.

• slice_syntax

Produces a shallow copy; mutable elements inside the slice remain shared with the original.

Signals the intent to ignore or discard the first element, often used to skip headers or metadata.

Think 'skip first'.

Equivalent to slice(sequence, 1, None) or sequence.__getitem__(slice(1, None)).

Learn slicing with step and negative indices, and advanced slicing with NumPy arrays.