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28 lines
807 B
Python
28 lines
807 B
Python
# Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This source code is licensed under the MIT license found in the
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# LICENSE file in the root directory of this source tree.
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# pyre-strict
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def expand_tabs(line: str) -> str:
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"""
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Tabs are treated as 1-8 spaces according to
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https://docs.python.org/3/reference/lexical_analysis.html#indentation
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Given a string with tabs, this removes all tab characters and replaces them with the
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appropriate number of spaces.
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"""
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result_list = []
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total = 0
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for ch in line:
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if ch == "\t":
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prev_total = total
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total = ((total + 8) // 8) * 8
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result_list.append(" " * (total - prev_total))
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else:
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total += 1
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result_list.append(ch)
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return "".join(result_list)
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