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Unpacking

crates/ty_python_semantic/resources/mdtest/diagnostics/unpacking.md

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Unpacking

Right hand side not iterable

py
a, b = 1  # snapshot: not-iterable
snapshot
error[not-iterable]: Object of type `Literal[1]` is not iterable
 --> src/mdtest_snippet.py:1:8
  |
1 | a, b = 1  # snapshot: not-iterable
  |        ^
  |
info: It doesn't have an `__iter__` method or a `__getitem__` method

Exactly too many values to unpack

py
a, b = (1, 2, 3)  # snapshot: invalid-assignment
snapshot
error[invalid-assignment]: Too many values to unpack
 --> src/mdtest_snippet.py:1:1
  |
1 | a, b = (1, 2, 3)  # snapshot: invalid-assignment
  | ^^^^   --------- Got 3
  | |
  | Expected 2
  |

Exactly too few values to unpack

py
a, b = (1,)  # snapshot: invalid-assignment
snapshot
error[invalid-assignment]: Not enough values to unpack
 --> src/mdtest_snippet.py:1:1
  |
1 | a, b = (1,)  # snapshot: invalid-assignment
  | ^^^^   ---- Got 1
  | |
  | Expected 2
  |

Too few values to unpack

py
[a, *b, c, d] = (1, 2)  # snapshot: invalid-assignment
snapshot
error[invalid-assignment]: Not enough values to unpack
 --> src/mdtest_snippet.py:1:1
  |
1 | [a, *b, c, d] = (1, 2)  # snapshot: invalid-assignment
  | ^^^^^^^^^^^^^   ------ Got 2
  | |
  | Expected at least 3
  |