This repository was archived by the owner on Apr 14, 2022. It is now read-only.
This repository was archived by the owner on Apr 14, 2022. It is now read-only.
Variable used before definition #475
Description
@azdanov commented on Sat Dec 08 2018
Environment data
- VS Code version: 1.29.1 (1.29.1)
- Extension version (available under the Extensions sidebar): 2018.11.0
- OS and version: macOS Mojave 10.14.1 (18B75)
- Python version (& distribution if applicable, e.g. Anaconda): Python 3.7.1 64-bit
- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv
- Relevant/affected Python packages and their versions: -
Expected behaviour
When running provided code snippet there should be no warning.
from typing import Dict
fallbackName: Dict[str, str] = {"firstName": "First", "lastName": "Last"}
NAME = " ".join(str(x) for x in fallbackName.values())
print(f"Hi, {NAME}!")Actual behaviour
A warning is generated: 'fallbackName' used before definition
{
"resource": "/Users/_____/Projects/python/sandbox/index.py",
"owner": "_generated_diagnostic_collection_name_#0",
"code": "use-before-def",
"severity": 4,
"message": "'fallbackName' used before definition",
"source": "Python",
"startLineNumber": 5,
"startColumn": 33,
"endLineNumber": 5,
"endColumn": 45
}Additional Info
This does not happen when type hinting is removed:
FALLBACK_NAME = {"first_name": "First", "last_name": "Last"}
NAME = " ".join(str(x) for x in FALLBACK_NAME.values())
print(f"Hi, {NAME}!")Steps to reproduce:
- Create a new project,
python3 -m venv new/venv. - Insert code into
new/index.py. - Lint.
Logs
Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)
Starting Microsoft Python language server.
Microsoft Python Language Server version 0.1.66.0
Initializing for /Users/_____/Projects/python/sandbox/venv/bin/python
##########Linting Output - prospector##########
{
"summary": {
"started": "2018-12-08 12:13:01.666245",
"libraries": [],
"strictness": "from profile",
"profiles": ".prospector.yaml, full_pep8, doc_warnings, strictness_veryhigh, no_member_warnings",
"tools": [
"dodgy",
"mccabe",
"mypy",
"pep257",
"pep8",
"profile-validator",
"pyflakes",
"pylint"
],
"message_count": 0,
"completed": "2018-12-08 12:13:02.171521",
"time_taken": "0.51",
"formatter": "json"
},
"messages": []
}
Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)
INFO no standard startup: not a new window
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Create file systemwatcher with pattern */python
console.ts:134 [Extension Host] Python Extension: Create file systemwatcher with pattern */*/python
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Register Intepreter Watcher, Arg 1: {"$mid":1,"fsPath":"/Users/_____/Projects/python/sandbox","external":"file:///Users/_____/Projects/python/sandbox","path":"/Users/_____/Projects/python/sandbox","scheme":"file"}, Return Value:
console.ts:134 [Extension Host] Python Extension: Create file systemwatcher with pattern */python
console.ts:134 [Extension Host] Python Extension: Create file systemwatcher with pattern */*/python
console.ts:134 [Extension Host] Python Extension: Display locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: Notify locators are locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Detected refreshing of Interpreters, Arg 1: {}, Return Value:
console.ts:134 [Extension Host] Python Extension: Build the workspace interpreter watcher, Arg 1: {"$mid":1,"fsPath":"/Users/_____/Projects/python/sandbox","external":"file:///Users/_____/Projects/python/sandbox","path":"/Users/_____/Projects/python/sandbox","scheme":"file"}, Return Value: UNABLE TO DETERMINE VALUE
console.ts:134 [Extension Host] Python Extension: Register Intepreter Watcher, Arg 1: undefined, Return Value:
console.ts:134 [Extension Host] Python Extension: Build the workspace interpreter watcher, Arg 1: undefined, Return Value: UNABLE TO DETERMINE VALUE
console.ts:134 [Extension Host] Python Extension: Get language server folder name, , Return Value: "languageServer.0.1.66"
6console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Hide locator refreshing progress, , Return Value:
console.ts:134 [Extension Host] Python Extension: All locators have completed locating, , Return Value:
console.ts:134 [Extension Host] Python Extension: Checking whether locactors have completed locating, , Return Value:
@yehorb commented on Sat Dec 08 2018
I have a similar issue with my Python.
VS Code version: 1.29.1 (1.29.1)
Extension version (available under the Extensions sidebar): 2018.11.0
OS and version: Ubuntu 18.04.1 LTS
Python version (& distribution if applicable, e.g. Anaconda): Python 3.6.7 64-bit
Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda
Relevant/affected Python packages and their versions: not relevant
Issues disappear if you reload window, but reappear if I make even the slightest edit to the code written. Sometimes they appear as I type (e.g. I type "return True" and issues are " 're' used before definition", " 'ret' used before definition" and so on).
Issue appears to occur more in longer files.
@azdanov commented on Sat Dec 08 2018
@yehorb Could you create a minimal Github repo with a reproducible error? It will help a lot in fixing this issue.
In my case, this happens because of typing.
@yehorb commented on Mon Dec 10 2018
Here:
https://github.com/yehorb/VSCode-use-before-def-bug
This is the output I get:
@azdanov commented on Mon Dec 10 2018
@yehorb Awesome, thanks! Now it's just waiting for a maintainer to triage this issue. 🤷♂️
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