➜
This issue tracker has been migrated to GitHub,
and is currently read-only.
For more information,
see the GitHub FAQs in the Python's Developer Guide.
Created on 2011-12-22 20:25 by wilhall, last changed 2022-04-11 14:57 by admin. This issue is now closed.
| Files | ||||
|---|---|---|---|---|
| File name | Uploaded | Description | Edit | |
| lambda_tests.py | wilhall, 2011-12-22 20:25 | Lambda Function Tests | ||
| Messages (3) | |||
|---|---|---|---|
| msg150107 - (view) | Author: WIl Hall (wilhall) | Date: 2011-12-22 20:25 | |
When creating lambda functions in a loop, variables involved in the lambda statements appear to not resolve until the loop finishes. This results in all of the defined lambda functions using the same variable to resolve to the last value of that variable. For example, in my test program attached, I loop through a list of words: ["one", "two", "three", "four"] and create a function for each word, I.e: lambda: print_word(word). This results in every function having the word "four" as their argument. This doesn't seem like intended behavior. Im my example program attached, I demonstrate both the intended and not intended behavior - creating the lambda functions in another function, versus creating them in a loop. |
|||
| msg150109 - (view) | Author: Matthew Barnett (mrabarnett) *  |
Date: 2011-12-22 20:59 | |
That's not a bug. This might help to explain what's going on: What do (lambda) function closures capture in Python? http://stackoverflow.com/questions/2295290/what-do-lambda-function-closures-capture-in-python |
|||
| msg150110 - (view) | Author: WIl Hall (wilhall) | Date: 2011-12-22 21:04 | |
Makes sense. Misunderstanding on my part, then. Closing as invalid (not a bug). |
|||
| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:24 | admin | set | github: 57861 |
| 2011-12-22 21:04:23 | wilhall | set | messages: + msg150110 |
| 2011-12-22 21:03:17 | benjamin.peterson | set | status: open -> closed resolution: not a bug |
| 2011-12-22 20:59:59 | mrabarnett | set | nosy:
+ mrabarnett messages: + msg150109 |
| 2011-12-22 20:25:27 | wilhall | create | |