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2ae0eb1a87
GH-132661: Add ``string.templatelib.convert()`` (GH-135217)
(cherry picked from commit 5b969fd645)
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
33 lines
956 B
Python
33 lines
956 B
Python
"""Support for template string literals (t-strings)."""
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t = t"{0}"
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Template = type(t)
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Interpolation = type(t.interpolations[0])
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del t
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def convert(obj, /, conversion):
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"""Convert *obj* using formatted string literal semantics."""
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if conversion is None:
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return obj
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if conversion == 'r':
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return repr(obj)
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if conversion == 's':
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return str(obj)
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if conversion == 'a':
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return ascii(obj)
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raise ValueError(f'invalid conversion specifier: {conversion}')
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def _template_unpickle(*args):
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import itertools
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if len(args) != 2:
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raise ValueError('Template expects tuple of length 2 to unpickle')
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strings, interpolations = args
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parts = []
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for string, interpolation in itertools.zip_longest(strings, interpolations):
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if string is not None:
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parts.append(string)
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if interpolation is not None:
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parts.append(interpolation)
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return Template(*parts)
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