cut stringclasses 1
value | version stringclasses 10
values | idiom_id stringclasses 53
values | pep stringclasses 53
values | introduced_in stringclasses 11
values | form stringclasses 2
values | file stringclasses 887
values | code stringclasses 916
values | source stringclasses 1
value | origin stringlengths 15 17 | origin_revision stringclasses 10
values | license stringclasses 1
value |
|---|---|---|---|---|---|---|---|---|---|---|---|
train | 3.8 | literal-types | 586 | 3.8 | modern | literal-types/modern_18.py | def foobar(arg1: Literal[1], arg2: Literal[True]) -> None:
pass
| pydocs | pep-0586.rst:665 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_01.py | from typing import TypedDict
class Movie(TypedDict):
name: str
year: int
| pydocs | pep-0589.rst:37 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_02.py | class EmptyDict(TypedDict):
pass
| pydocs | pep-0589.rst:159 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_03.py | class Strings(TypedDict):
items: List[str]
print(isinstance({'items': [1]}, Strings)) # Should be False
print(isinstance({'items': ['x']}, Strings)) # Should be True
| pydocs | pep-0589.rst:231 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_04.py | class BookBasedMovie(TypedDict):
name: str
year: int
based_on: str
| pydocs | pep-0589.rst:255 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_05.py | class X(TypedDict):
x: int
class Y(TypedDict):
y: str
class XYZ(X, Y):
z: bool
| pydocs | pep-0589.rst:262 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_06.py | class X(TypedDict):
x: str
class Y(X):
x: int # Type check error: cannot overwrite TypedDict field "x"
| pydocs | pep-0589.rst:282 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_07.py | class X(TypedDict):
x: int
class Y(TypedDict):
x: str
class XYZ(X, Y): # Type check error: cannot overwrite TypedDict field "x" while merging
xyz: bool
| pydocs | pep-0589.rst:296 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_08.py | class Movie(TypedDict, total=False):
name: str
year: int
| pydocs | pep-0589.rst:313 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_09.py | Movie = TypedDict('Movie', {'name': str, 'year': int})
| pydocs | pep-0589.rst:342 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_10.py | Movie = TypedDict('Movie',
{'name': str, 'year': int},
total=False)
| pydocs | pep-0589.rst:346 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_11.py | class A(TypedDict):
x: Optional[int]
class B(TypedDict):
x: int
def f(a: A) -> None:
a['x'] = None
b: B = {'x': 0}
f(b) # Type check error: 'B' not compatible with 'A'
b['x'] + 1 # Runtime error: None + 1
| pydocs | pep-0589.rst:391 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_12.py | class A(TypedDict, total=False):
x: int
class B(TypedDict):
x: int
def f(a: A) -> None:
del a['x']
b: B = {'x': 0}
f(b) # Type check error: 'B' not compatible with 'A'
b['x'] + 1 # Runtime KeyError: 'x'
| pydocs | pep-0589.rst:408 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_13.py | class A(TypedDict):
x: int
class B(A):
y: str
def f(d: Dict[str, int]) -> None:
d['y'] = 0
def g(a: A) -> None:
f(a) # Type check error: 'A' incompatible with Dict[str, int]
b: B = {'x': 0, 'y': 'foo'}
g(b)
b['y'] + 'bar' # Runtime error: int + str
| pydocs | pep-0589.rst:453 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | typed-dict | 589 | 3.8 | modern | typed-dict/modern_14.py | class A(TypedDict):
x: int
class B(TypedDict):
x: int
y: str
def sum_values(m: Mapping[str, int]) -> int:
n = 0
for v in m.values():
n += v # Runtime error
return n
def f(a: A) -> None:
sum_values(a) # Error: 'A' incompatible with Mapping[str, int]
b: B = {'x': 0, 'y': 'foo'}
f... | pydocs | pep-0589.rst:475 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_01.py | from typing import final
@final
class Base:
...
class Derived(Base): # Error: Cannot inherit from final class "Base"
...
| pydocs | pep-0591.rst:83 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_02.py | from typing import final
class Base:
@final
def foo(self) -> None:
...
class Derived(Base):
def foo(self) -> None: # Error: Cannot override final attribute "foo"
# (previously declared in base class "Base")
...
| pydocs | pep-0591.rst:94 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_03.py | from typing import Any, overload
class Base:
@overload
def method(self) -> None: ...
@overload
def method(self, arg: int) -> int: ...
@final
def method(self, x=None):
...
| pydocs | pep-0591.rst:110 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_04.py | ID: Final[float] = 1
| pydocs | pep-0591.rst:136 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_05.py | ID: Final = 1
| pydocs | pep-0591.rst:140 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_06.py | from typing import Final
RATE: Final = 3000
class Base:
DEFAULT_ID: Final = 0
RATE = 300 # Error: can't assign to final attribute
Base.DEFAULT_ID = 1 # Error: can't override a final attribute
| pydocs | pep-0591.rst:170 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_07.py | from typing import Final
class Window:
BORDER_WIDTH: Final = 2.5
...
class ListView(Window):
BORDER_WIDTH = 3 # Error: can't override a final attribute
| pydocs | pep-0591.rst:187 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_08.py | class ImmutablePoint:
x: Final[int]
y: Final[int] # Error: final attribute without an initializer
def __init__(self) -> None:
self.x = 1 # Good
| pydocs | pep-0591.rst:199 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_09.py | x: List[Final[int]] = [] # Error!
def fun(x: Final[List[int]]) -> None: # Error!
...
| pydocs | pep-0591.rst:214 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_10.py | x: Final = ['a', 'b']
x.append('c') # OK
y: Final[Sequence[str]] = ['a', 'b']
y.append('x') # Error: "Sequence[str]" has no attribute "append"
z: Final = ('a', 'b') # Also works
| pydocs | pep-0591.rst:224 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | final-qualifier | 591 | 3.8 | modern | final-qualifier/modern_11.py | from typing import NamedTuple, Final
X: Final = "x"
Y: Final = "y"
N = NamedTuple("N", [(X, int), (Y, int)])
| pydocs | pep-0591.rst:236 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_01.py | import datetime
name = 'Fred'
age = 50
anniversary = datetime.date(1991, 10, 12)
f'My name is {name}, my age next year is {age+1}, my anniversary is {anniversary:%A, %B %d, %Y}.'
f'He said his name is {name!r}.'
| pydocs | pep-0498.txt:36 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_01.py | msg = 'disk failure'
'error: %s' % msg
| pydocs | pep-0498.txt:62 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_02.py | msg = ('disk failure', 32)
'error: %s' % msg
| pydocs | pep-0498.txt:68 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_03.py | 'error: %s' % (msg,)
| pydocs | pep-0498.txt:76 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_04.py | value = 4 * 20
'The value is {value}.'.format(value=value)
| pydocs | pep-0498.txt:90 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_05.py | 'The value is {}.'.format(value)
| pydocs | pep-0498.txt:98 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_02.py | f'The value is {value}.'
| pydocs | pep-0498.txt:103 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_03.py | value = 1234
f'input={value:#06x}'
| pydocs | pep-0498.txt:118 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_04.py | date = datetime.date(1991, 10, 12)
f'{date} was on a {date:%A}'
| pydocs | pep-0498.txt:125 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_06.py | def outer(x):
def inner():
return 'x={x}'.format_map(locals())
return inner
outer(42)()
| pydocs | pep-0498.txt:137 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_07.py | def outer(x):
def inner():
x
return 'x={x}'.format_map(locals())
return inner
outer(42)()
| pydocs | pep-0498.txt:152 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_05.py | f'{"quoted string"}'
| pydocs | pep-0498.txt:254 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_06.py | f'{{ {4*10} }}'
f'{{{4*10}}}'
| pydocs | pep-0498.txt:263 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_07.py | fr'x={4*10}\n'
| pydocs | pep-0498.txt:271 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_08.py | f"abc {a['x']} def"
| pydocs | pep-0498.txt:281 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_09.py | f'''abc {a['x']} def'''
| pydocs | pep-0498.txt:285 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_10.py | f'abc{expr1:spec1}{expr2!r:spec2}def{expr3}ghi'
| pydocs | pep-0498.txt:297 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_11.py | def foo():
return 20
f'result={foo()}'
| pydocs | pep-0498.txt:317 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_12.py | x = 0
f'''{x
+1}'''
d = {0: 'zero'}
f'''{d[0
]}'''
| pydocs | pep-0498.txt:334 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_13.py | width = 10
precision = 4
value = decimal.Decimal('12.34567')
f'result: {value:{width}.{precision}}'
| pydocs | pep-0498.txt:350 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_14.py | x = 10
y = 'hi'
'a' 'b' f'{x}' '{c}' f'str<{y:^4}>' 'd' 'e'
| pydocs | pep-0498.txt:368 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_15.py | d = {0:10, 1:20}
for i in range(3):
print(f'{i}:{d[i]}')
| pydocs | pep-0498.txt:413 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_16.py | for x in (32, 100, 'fifty'):
print(f'x = {x:+3}')
| pydocs | pep-0498.txt:425 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_17.py | def fn(l, incr):
result = l[0]
l[0] += incr
return result
lst = [0]
f'{fn(lst,2)} {fn(lst,3)}'
f'{fn(lst,2)} {fn(lst,3)}'
lst
| pydocs | pep-0498.txt:447 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_18.py | f'Column={col_idx+1}'
f'number of items: {len(items)}'
| pydocs | pep-0498.txt:521 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_19.py | col_number = col_idx+1
f'Column={col_number}'
n_items = len(items)
f'number of items: {n_items}'
| pydocs | pep-0498.txt:526 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_20.py | f'mapping is { {a:b for (a, b) in ((1, 2), (3, 4))} }'
| pydocs | pep-0498.txt:535 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_08.py | d = {'a': 10, 'b': 20}
'a={d[a]}'.format(d=d)
| pydocs | pep-0498.txt:554 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_21.py | f'a={d["a"]}'
| pydocs | pep-0498.txt:564 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_22.py | a = 'b'
f'a={d[a]}'
| pydocs | pep-0498.txt:570 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | legacy | fstring/legacy_09.py | '{i[";]}'.format(i={'";':4})
| pydocs | pep-0498.txt:580 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_23.py | header = 'Subject'
fr'{header}:\s+'
| pydocs | pep-0498.txt:600 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_24.py | a = 'some string'
f'{a!r}'
| pydocs | pep-0498.txt:635 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_25.py | f'{repr(a)}'
| pydocs | pep-0498.txt:641 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_26.py | f'{(lambda x: x*2)(3)}'
| pydocs | pep-0498.txt:664 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_27.py | extra = '{},waiters:{}'.format(extra, len(self._waiters))
extra = f'{extra},waiters:{len(self._waiters)}'
| pydocs | pep-0498.txt:686 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_28.py | message.append(" [line {0:2d}]".format(lineno))
message.append(f" [line {lineno:2d}]")
| pydocs | pep-0498.txt:691 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_29.py | methoddef_name = "{}_METHODDEF".format(c_basename.upper())
methoddef_name = f"{c_basename.upper()}_METHODDEF"
| pydocs | pep-0498.txt:696 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | fstring | 498 | 3.6 | modern | fstring/modern_30.py | print("Usage: {0} [{1}]".format(sys.argv[0], '|'.join('--'+opt for opt in valid_opts)), file=sys.stderr)
print(f"Usage: {sys.argv[0]} [{'|'.join('--'+opt for opt in valid_opts)}]", file=sys.stderr)
| pydocs | pep-0498.txt:701 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_01.py | match = re.match(data)
group = match.group(1) if match else None
| pydocs | pep-0572.rst:87 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_02.py | group = re.match(data).group(1) if re.match(data) else None
| pydocs | pep-0572.rst:92 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_03.py | match1 = pattern1.match(data)
match2 = pattern2.match(data)
if match1:
result = match1.group(1)
elif match2:
result = match2.group(2)
else:
result = None
| pydocs | pep-0572.rst:97 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_04.py | match1 = pattern1.match(data)
if match1:
result = match1.group(1)
else:
match2 = pattern2.match(data)
if match2:
result = match2.group(2)
else:
result = None
| pydocs | pep-0572.rst:110 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_01.py | # Handle a matched regex
if (match := pattern.search(data)) is not None:
...
# Do something with match
# A loop that can't be trivially rewritten using 2-arg iter()
while chunk := file.read(8192):
process(chunk)
# Reuse a value that's expensive to compute
[y := f(x), y**2, y**3]
# Share a subexpression be... | pydocs | pep-0572.rst:133 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_02.py | f'{(x:=10)}' # Valid, uses assignment expression
x = 10
f'{x:=10}' # Valid, passes '=10' to formatter
| pydocs | pep-0572.rst:222 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_03.py | if any((comment := line).startswith('#') for line in lines):
print("First comment:", comment)
else:
print("There are no comments")
if all((nonblank := line).strip() == '' for line in lines):
print("All lines are blank")
else:
print("First non-blank line:", nonblank)
| pydocs | pep-0572.rst:257 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_04.py | # Compute partial sums in a list comprehension
total = 0
partial_sums = [total := total + v for v in values]
print("Total:", total)
| pydocs | pep-0572.rst:270 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_05.py | [[(j := j) for i in range(5)] for j in range(5)] # INVALID
[i := 0 for i, j in stuff] # INVALID
[i+1 for i in (i := stuff)] # INVALID
| pydocs | pep-0572.rst:287 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_06.py | [False and (i := 0) for i, j in stuff] # INVALID
[i for i, j in stuff if True or (j := 1)] # INVALID
| pydocs | pep-0572.rst:299 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_07.py | [i+1 for i in (j := stuff)] # INVALID
[i+1 for i in range(2) for j in (k := stuff)] # INVALID
[i+1 for i in [j for j in (k := stuff)]] # INVALID
[i+1 for i in (lambda: (j := stuff))()] # INVALID
| pydocs | pep-0572.rst:316 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_08.py | class Example:
[(j := i) for i in range(5)] # INVALID
| pydocs | pep-0572.rst:327 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_09.py | # Valid
if any(len(longline := line) >= 100 for line in lines):
print("Extremely long line:", longline)
| pydocs | pep-0572.rst:386 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_10.py | x = 1, 2 # Sets x to (1, 2)
(x := 1, 2) # Sets x to 1
| pydocs | pep-0572.rst:433 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_05.py | env_base = os.environ.get("PYTHONUSERBASE", None)
if env_base:
return env_base
| pydocs | pep-0572.rst:491 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_11.py | if env_base := os.environ.get("PYTHONUSERBASE", None):
return env_base
| pydocs | pep-0572.rst:497 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_06.py | if self._is_special:
ans = self._check_nans(context=context)
if ans:
return ans
| pydocs | pep-0572.rst:507 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_12.py | if self._is_special and (ans := self._check_nans(context=context)):
return ans
| pydocs | pep-0572.rst:514 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_07.py | reductor = dispatch_table.get(cls)
if reductor:
rv = reductor(x)
else:
reductor = getattr(x, "__reduce_ex__", None)
if reductor:
rv = reductor(4)
else:
reductor = getattr(x, "__reduce__", None)
if reductor:
rv = reductor()
else:
raise Error(
... | pydocs | pep-0572.rst:525 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_13.py | if reductor := dispatch_table.get(cls):
rv = reductor(x)
elif reductor := getattr(x, "__reduce_ex__", None):
rv = reductor(4)
elif reductor := getattr(x, "__reduce__", None):
rv = reductor()
else:
raise Error("un(deep)copyable object of type %s" % cls)
| pydocs | pep-0572.rst:542 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_08.py | s = _format_time(self._hour, self._minute,
self._second, self._microsecond,
timespec)
tz = self._tzstr()
if tz:
s += tz
return s
| pydocs | pep-0572.rst:559 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_14.py | s = _format_time(self._hour, self._minute,
self._second, self._microsecond,
timespec)
if tz := self._tzstr():
s += tz
return s
| pydocs | pep-0572.rst:569 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_09.py | while True:
line = fp.readline()
if not line:
break
m = define_rx.match(line)
if m:
n, v = m.group(1, 2)
try:
v = int(v)
except ValueError:
pass
vars[n] = v
else:
m = undef_rx.match(line)
if m:
vars[m.group(1... | pydocs | pep-0572.rst:585 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_15.py | while line := fp.readline():
if m := define_rx.match(line):
n, v = m.group(1, 2)
try:
v = int(v)
except ValueError:
pass
vars[n] = v
elif m := undef_rx.match(line):
vars[m.group(1)] = 0
| pydocs | pep-0572.rst:604 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_16.py | results = [(x, y, x/y) for x in input_data if (y := f(x)) > 0]
| pydocs | pep-0572.rst:622 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_17.py | stuff = [[y := f(x), x/y] for x in range(5)]
| pydocs | pep-0572.rst:627 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_18.py | # Loop-and-a-half
while (command := input("> ")) != "quit":
print("You entered:", command)
# Capturing regular expression match objects
# See, for instance, Lib/pydoc.py, which uses a multiline spelling
# of this effect
if match := re.search(pat, text):
print("Found:", match.group(0))
# The same syntax chains ... | pydocs | pep-0572.rst:639 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_19.py | if pid := os.fork():
...
# Parent code
else:
...
# Child code
| pydocs | pep-0572.rst:669 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_20.py | pos = -1
while pos := buffer.find(search_term, pos + 1) >= 0:
...
| pydocs | pep-0572.rst:862 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_21.py | (point := (x, y))
(point := x, y)
| pydocs | pep-0572.rst:882 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_22.py | foo(x := 1, y)
foo(x := (1, y))
| pydocs | pep-0572.rst:892 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_23.py | # Top level in if
if match := pattern.match(line):
return match.group(1)
# Short call
len(lines := f.readlines())
| pydocs | pep-0572.rst:907 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_10.py | mylast = mylast[1]
yield mylast[0]
| pydocs | pep-0572.rst:996 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | modern | walrus/modern_24.py | yield (mylast := mylast[1])[0]
| pydocs | pep-0572.rst:1001 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
train | 3.8 | walrus | 572 | 3.8 | legacy | walrus/legacy_11.py | while True:
old = total
total += term
if old == total:
return total
term *= mx2 / (i*(i+1))
i += 2
| pydocs | pep-0572.rst:1009 | 3c69ec5e81bc7dc5a6a2a90b6ffb6a2d7b626c96 | CC0-1.0 |
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