1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
-- Semantic analysis of named tuples
[case testSimpleNamedtuple]
from collections import namedtuple
N = namedtuple('N', ['a'])
def f() -> N: pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(collections, [namedtuple])
AssignmentStmt:2(
NameExpr(N* [__main__.N])
NamedTupleExpr:2(N, Tuple[Any]))
FuncDef:3(
f
def () -> Tuple[Any, fallback=__main__.N]
Block:3(
PassStmt:3())))
[case testTwoItemNamedtuple]
from collections import namedtuple
N = namedtuple('N', ['a', 'xyz'])
def f() -> N: pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(collections, [namedtuple])
AssignmentStmt:2(
NameExpr(N* [__main__.N])
NamedTupleExpr:2(N, Tuple[Any, Any]))
FuncDef:3(
f
def () -> Tuple[Any, Any, fallback=__main__.N]
Block:3(
PassStmt:3())))
[case testTwoItemNamedtupleWithTupleFieldNames]
from collections import namedtuple
N = namedtuple('N', ('a', 'xyz'))
def f() -> N: pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(collections, [namedtuple])
AssignmentStmt:2(
NameExpr(N* [__main__.N])
NamedTupleExpr:2(N, Tuple[Any, Any]))
FuncDef:3(
f
def () -> Tuple[Any, Any, fallback=__main__.N]
Block:3(
PassStmt:3())))
[case testTwoItemNamedtupleWithShorthandSyntax]
from collections import namedtuple
N = namedtuple('N', ' a xyz ')
def f() -> N: pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(collections, [namedtuple])
AssignmentStmt:2(
NameExpr(N* [__main__.N])
NamedTupleExpr:2(N, Tuple[Any, Any]))
FuncDef:3(
f
def () -> Tuple[Any, Any, fallback=__main__.N]
Block:3(
PassStmt:3())))
[case testNamedTupleWithItemTypes]
from typing import NamedTuple
N = NamedTuple('N', [('a', int),
('b', str)])
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(typing, [NamedTuple])
AssignmentStmt:2(
NameExpr(N* [__main__.N])
NamedTupleExpr:2(N, Tuple[builtins.int, builtins.str])))
[case testNamedTupleWithTupleFieldNamesWithItemTypes]
from typing import NamedTuple
N = NamedTuple('N', (('a', int),
('b', str)))
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(typing, [NamedTuple])
AssignmentStmt:2(
NameExpr(N* [__main__.N])
NamedTupleExpr:2(N, Tuple[builtins.int, builtins.str])))
[case testNamedTupleBaseClass]
from collections import namedtuple
N = namedtuple('N', ['x'])
class A(N): pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(collections, [namedtuple])
AssignmentStmt:2(
NameExpr(N* [__main__.N])
NamedTupleExpr:2(N, Tuple[Any]))
ClassDef:3(
A
TupleType(
Tuple[Any, fallback=__main__.N])
BaseType(
__main__.N)
PassStmt:3()))
[case testNamedTupleBaseClass2]
from collections import namedtuple
class A(namedtuple('N', ['x'])): pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(collections, [namedtuple])
ClassDef:2(
A
TupleType(
Tuple[Any, fallback=__main__.N@2])
BaseType(
__main__.N@2)
PassStmt:2()))
[case testNamedTupleBaseClassWithItemTypes]
from typing import NamedTuple
class A(NamedTuple('N', [('x', int)])): pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(typing, [NamedTuple])
ClassDef:2(
A
TupleType(
Tuple[builtins.int, fallback=__main__.N@2])
BaseType(
__main__.N@2)
PassStmt:2()))
-- Errors
[case testNamedTupleWithTooFewArguments]
from collections import namedtuple
N = namedtuple('N') # E: Too few arguments for "namedtuple()"
[builtins fixtures/tuple.pyi]
[case testNamedTupleWithInvalidName]
from collections import namedtuple
N = namedtuple(1, ['x']) # E: "namedtuple()" expects a string literal as the first argument
[builtins fixtures/tuple.pyi]
[case testNamedTupleWithInvalidItems]
from collections import namedtuple
N = namedtuple('N', 1) # E: List or tuple literal expected as the second argument to "namedtuple()"
[builtins fixtures/tuple.pyi]
[case testNamedTupleWithInvalidItems2]
from collections import namedtuple
N = namedtuple('N', ['x', 1]) # E: String literal expected as "namedtuple()" item
[builtins fixtures/tuple.pyi]
[case testNamedTupleWithUnderscoreItemName]
from collections import namedtuple
N = namedtuple('N', ['_fallback']) # E: "namedtuple()" field name "_fallback" starts with an underscore
[builtins fixtures/tuple.pyi]
-- NOTE: The following code works at runtime but is not yet supported by mypy.
-- Keyword arguments may potentially be supported in the future.
[case testNamedTupleWithNonpositionalArgs]
from collections import namedtuple
N = namedtuple(typename='N', field_names=['x']) # E: Unexpected arguments to "namedtuple()"
[builtins fixtures/tuple.pyi]
[case testTypingNamedTupleWithTooFewArguments]
from typing import NamedTuple
N = NamedTuple('N') # E: Too few arguments for "NamedTuple()"
[builtins fixtures/tuple.pyi]
[case testTypingNamedTupleWithManyArguments]
from typing import NamedTuple
N = NamedTuple('N', [], []) # E: Too many arguments for "NamedTuple()"
[builtins fixtures/tuple.pyi]
[case testTypingNamedTupleWithInvalidName]
from typing import NamedTuple
N = NamedTuple(1, ['x']) # E: "NamedTuple()" expects a string literal as the first argument
[builtins fixtures/tuple.pyi]
[case testTypingNamedTupleWithInvalidItems]
from typing import NamedTuple
N = NamedTuple('N', 1) # E: List or tuple literal expected as the second argument to "NamedTuple()"
[builtins fixtures/tuple.pyi]
[case testTypingNamedTupleWithUnderscoreItemName]
from typing import NamedTuple
N = NamedTuple('N', [('_fallback', int)]) # E: "NamedTuple()" field name "_fallback" starts with an underscore
[builtins fixtures/tuple.pyi]
[case testTypingNamedTupleWithUnexpectedNames]
from typing import NamedTuple
N = NamedTuple(name='N', fields=[]) # E: Unexpected arguments to "NamedTuple()"
[builtins fixtures/tuple.pyi]
-- NOTE: The following code works at runtime but is not yet supported by mypy.
-- Keyword arguments may potentially be supported in the future.
[case testNamedTupleWithNonpositionalArgs2]
from collections import namedtuple
N = namedtuple(typename='N', field_names=['x']) # E: Unexpected arguments to "namedtuple()"
[builtins fixtures/tuple.pyi]
[case testInvalidNamedTupleBaseClass]
from typing import NamedTuple
class A(NamedTuple('N', [1])): pass # E: Tuple expected as "NamedTuple()" field
class B(A): pass
[builtins fixtures/tuple.pyi]
[case testInvalidNamedTupleBaseClass2]
class A(NamedTuple('N', [1])): pass
class B(A): pass
[out]
main:2: error: Unsupported dynamic base class "NamedTuple"
main:2: error: Name "NamedTuple" is not defined
[case testNamedTupleWithDecorator]
from typing import final, NamedTuple
@final
class A(NamedTuple("N", [("x", int)])):
pass
[builtins fixtures/tuple.pyi]
[out]
MypyFile:1(
ImportFrom:1(typing, [final, NamedTuple])
ClassDef:4(
A
TupleType(
Tuple[builtins.int, fallback=__main__.N@4])
Decorators(
NameExpr(final [typing.final]))
BaseType(
__main__.N@4)
PassStmt:5()))
|
