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"""Support for template string literals (t-strings)."""
t = t"{0}"
Template = type(t)
Interpolation = type(t.interpolations[0])
del t
def convert(obj, /, conversion):
"""Convert *obj* using formatted string literal semantics."""
if conversion is None:
return obj
if conversion == 'r':
return repr(obj)
if conversion == 's':
return str(obj)
if conversion == 'a':
return ascii(obj)
raise ValueError(f'invalid conversion specifier: {conversion}')
def _template_unpickle(*args):
import itertools
if len(args) != 2:
raise ValueError('Template expects tuple of length 2 to unpickle')
strings, interpolations = args
parts = []
for string, interpolation in itertools.zip_longest(strings, interpolations):
if string is not None:
parts.append(string)
if interpolation is not None:
parts.append(interpolation)
return Template(*parts)
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