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Using smart send with REPL leads to NameError for every line of code #25117

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Using smart send with REPL leads to NameError for every line of code#25117
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anthonykim1
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area-replbugIssue identified by VS Code Team member as probable bug

Description

@John-Polo
John Polo (John-Polo)
opened on May 29, 2025

Type: Bug

Behaviour

Expected behavior: Inside a Python file, at a line, for example:
import numpy as np
use smart send ('shift+enter') to run REPL and watch code results. Move to next line and do the same thing.

Actual behavior: Editing in a Python file (.py) and using Smart Send with the VS Code REPL, each line of code sends as "deprecated", which in turn returns a NameError in the REPL window.

This doesn't happen in interactive sessions in the Python terminal in Code.

Steps to reproduce:

  1. Start Code with 'code .' from cmd prompt window where I've activated a conda environment.
  2. In current .py file in editor, use 'shift+enter' to run line.
  3. Python REPL window prints "deprecated" and reports a traceback with error:
    Traceback (most recent call last):
    File "c:\Users\japolo.vscode\extensions\ms-python.python-2025.6.1-win32-x64\python_files\python_server.py", line 133, in exec_user_input
    retval = callable_(user_input, user_globals)
    File "", line 1, in
    NameError: name 'deprecated' is not defined

Diagnostic data

There are no logs in the Output Panel. There are messages in the Problems panel:
[{
"resource": "Untitled-1.ipynb",
"owner": "python",
"severity": 8,
"message": ""return" can be used only within a function",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 7
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""directory" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 31,
"endLineNumber": 1,
"endColumn": 40
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""extension" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 54,
"endLineNumber": 1,
"endColumn": 63
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
},{
"resource": "Untitled-1.ipynb",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""deprecated" is not defined",
"source": "Pylance",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 11
}]
[{
"resource": "Untitled-2",
"owner": "python",
"severity": 8,
"message": "Expected one or more symbol names after "import"",
"source": "Pylance",
"startLineNumber": 8,
"startColumn": 17,
"endLineNumber": 9,
"endColumn": 1
}]
[{
"resource": "Untitled-1",
"owner": "python",
"code": {
"value": "reportUndefinedVariable",
"target": {
"$mid": 1,
"path": "/microsoft/pylance-release/blob/main/docs/diagnostics/reportUndefinedVariable.md",
"scheme": "https",
"authority": "github.com"
}
},
"severity": 4,
"message": ""os" is not defined",
"source": "Pylance",
"startLineNumber": 7,
"startColumn": 17,
"endLineNumber": 7,
"endColumn": 19
}]

Image

Activity

  1. github-actions
    assigned
    Erik De Bonte (debonte)
    on May 29, 2025

  2. github-actions commented on May 29, 2025

    @github-actions
    github-actionsbot
    on May 29, 2025 – with GitHub Actions

    Hi John Polo (@John-Polo), I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

    Potentially Related Issues:

    The team will respond to your issue shortly. Please note this is a trial feature and may not be fully accurate. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or was incorrect, please give it a 👎. Your feedback helps us improve!

  3. Rich Chiodo (rchiodo)
    transferred this issue frommicrosoft/pylance-releaseon May 29, 2025
  4. Rich Chiodo (rchiodo)
    unassigned
    Erik De Bonte (debonte)
    on May 29, 2025
  5. github-actions
    added
    triage-neededNeeds assignment to the proper sub-team
    on May 29, 2025
  6. Karthik Nadig (karthiknadig)
    assigned
    Anthony Kim (anthonykim1)
    on May 31, 2025
  7. Anthony Kim (anthonykim1)
    added
    bugIssue identified by VS Code Team member as probable bug
    area-repl
    and removed
    triage-neededNeeds assignment to the proper sub-team
    on Jun 10, 2025

  8. anthonykim1 commented on Jun 19, 2025

    @anthonykim1
    Anthony Kim (anthonykim1)
    on Jun 19, 2025

    Hi John Polo (@John-Polo) Apologies for late response.

    Do you mind sharing your content of the Python file?
    I believe this is happening because you have either deprecated (python2 code) in your Python file, or smart send is failing somehow with some code in your Python file.

    It would also help to turn off the smart send setting in your case via python.REPL.enableREPLSmartSend

  9. jlewonick commented on Jun 20, 2025

    @jlewonick
    jlewonick
    on Jun 20, 2025

    Also ran into this. I'm following along Python's tutorial and I'm saving files for each chapter.
    https://docs.python.org/3/tutorial/datastructures.html#list-comprehensions

    [x, x**2 for x in range(6)]
    was my offending line - I commented it out but I put it in there so I could see the error in action

    https://pastebin.com/1NLeALQy

  10. John-Polo commented on Jun 23, 2025

    @John-Polo
    John Polo (John-Polo)
    on Jun 23, 2025
    Author

    Anthony Kim (@anthonykim1) This is the code:

    import PIL.Image
import pandas as pd
import numpy as np
import cv2
import os
import glob
from pathlib import Path
import matplotlib as plt
import PIL
from PIL import Image, ImageEnhance
import statistics
from math import ceil

def list_files_with_glob(directory, extension):
    return glob.glob(os.path.join(directory, '**', '*' + extension), recursive=True)

files_directory = 'Z:/Late_blight/ms3/lamp/bright'
ftype_pat = '*.jpg'

# Make a list of all the files in the directory
chiplist1 = list_files_with_glob(files_directory, ftype_pat)

    I don't know what's different this time around, but the REPL is working. Thanks for following up. I'll close this.

  11. John Polo (John-Polo)
    closed this as completedon Jun 23, 2025

  12. John-Polo commented on Jun 23, 2025

    @John-Polo
    John Polo (John-Polo)
    on Jun 23, 2025
    Author

    jlewonick I don't know a lot about Python, so take my comment with some caution. Python's list comprehensions are definitely compliant with Python 3. While you may be getting an error from executing a list comprehension, I don't think it's actually behind the "deprecated" error you're getting. There might be another issue that's eliciting that error. Sorry, I don't know anything more to tell you. Maybe Anthony Kim (@anthonykim1) will weigh in on the issue. Good luck.

  13. guoci commented on Aug 26, 2025

    @guoci
    Guo Ci (guoci)
    on Aug 26, 2025

    This can be reproduced by having a syntax error anywhere in the file. I have just sent a pull request #25421 to clarify the warning message.

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