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69 lines
1.7 KiB
Python
69 lines
1.7 KiB
Python
# Self-checking test.
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# String interpolation tests
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var1 = 'x'
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var2 = 'y'
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abc = 'def'
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assert (f"interpolate {var1} strings {var2!r} {var2!s} 'py36" ==
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"interpolate x strings 'y' y 'py36")
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assert 'def0' == f'{abc}0'
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assert 'defdef' == f'{abc}{abc!s}'
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# From 3.6 functools.py
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# Bug was handling format operator strings.
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k, v = "1", ["2"]
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x = f"{k}={v!r}"
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y = f"functools.{x}({', '.join(v)})"
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assert x == "1=['2']"
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assert y == "functools.1=['2'](2)"
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# From 3.6 http/client.py
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# Bug is in handling X
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chunk = ['a', 'b', 'c']
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chunk2 = 'd'
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chunk = f'{len(chunk):X}' + chunk2
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assert chunk == '3d'
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chunk = b'abc'
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chunk2 = 'd'
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chunk = f'{len(chunk):X}\r\n'.encode('ascii') + chunk \
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+ b'\r\n'
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assert chunk == b'3\r\nabc\r\n'
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# From 3.6.8 idlelib/pyshell.py
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# Bug was handling '''
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import os
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filename = '.'
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source = 'foo'
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source = (f"__file__ = r'''{os.path.abspath(filename)}'''\n"
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+ source + "\ndel __file__")
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# Note how { and } are *not* escaped here
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f = 'one'
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name = 'two'
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assert(f"{f}{'{{name}}'} {f}{'{name}'}") == 'one{{name}} one{name}'
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# From 3.7.3 dataclasses.py
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log_rounds = 5
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assert "05$" == f'{log_rounds:02d}$'
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def testit(a, b, l):
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# print(l)
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return l
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# The call below shows the need for BUILD_STRING to count expr arguments.
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# Also note that we use {{ }} to escape braces in contrast to the example
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# above.
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def _repr_fn(fields):
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return testit('__repr__',
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('self',),
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['return xx + f"(' +
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', '.join([f"{f}={{self.{f}!r}}"
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for f in fields]) +
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')"'])
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fields = ['a', 'b', 'c']
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assert _repr_fn(fields) == ['return xx + f"(a={self.a!r}, b={self.b!r}, c={self.c!r})"']
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