{"id":9368,"library":"tqdm-joblib","title":"tqdm-joblib","description":"tqdm-joblib is a Python library that provides a context manager to easily integrate `tqdm` progress bars with `joblib.Parallel` execution. It addresses the challenge of displaying accurate and non-interfering progress updates when performing parallel computations with `joblib`. The current version is 0.0.5, and it appears to be actively maintained with recent releases.","status":"active","version":"0.0.5","language":"python","source_language":"en","source_url":"https://github.com/louisabraham/tqdm_joblib","tags":["tqdm","joblib","progress bar","parallel processing","multiprocessing"],"install":[{"cmd":"pip install tqdm-joblib","lang":"bash","label":"Install stable version"}],"dependencies":[{"reason":"Provides the progress bar functionality.","package":"tqdm","optional":false},{"reason":"Provides the parallel execution framework.","package":"joblib","optional":false}],"imports":[{"wrong":"import tqdm_joblib","symbol":"tqdm_joblib","correct":"import tqdm_joblib"}],"quickstart":{"code":"from math import sqrt\nfrom joblib import Parallel, delayed\nfrom tqdm_joblib import tqdm_joblib\n\ndef calculate_sqrt(x):\n    # Simulate some work\n    # time.sleep(0.01) # Uncomment to make tasks longer\n    return sqrt(x ** 2)\n\n# Using tqdm_joblib as a context manager\nwith tqdm_joblib(desc=\"My calculation\", total=100) as progress_bar:\n    results = Parallel(n_jobs=2)(delayed(calculate_sqrt)(i) for i in range(100))\n\nprint(f\"First 5 results: {results[:5]}\")","lang":"python","description":"This quickstart demonstrates how to use the `tqdm_joblib` context manager to wrap a `joblib.Parallel` call, automatically adding a progress bar for the parallel execution. The `desc` and `total` parameters are passed directly to `tqdm`."},"warnings":[{"fix":"Consider custom logging handlers with explicit locks for parallel processes, or use `tqdm.write()` from within parallel tasks if possible, ensuring it's properly configured for multiprocessing.","message":"When using `tqdm`'s `logging_redirect_tqdm` with `joblib.Parallel`, logging output from parallel processes can interfere with progress bar updates, causing them to 'jump' or become unreadable. This is a general issue with multiprocessing and `tqdm`'s logging redirection.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Always use the `tqdm_joblib` context manager as shown in the quickstart. If multiple independent progress bars are strictly needed in complex scenarios, consider assigning `position` arguments to each `tqdm` instance and ensuring proper locking mechanisms.","message":"Attempting to create multiple independent `tqdm` progress bars directly within each `joblib` worker process (without `tqdm-joblib`) can lead to overlapping and garbled output in the console. `tqdm-joblib` is designed to centralize and correctly display a single progress bar for the entire `Parallel` operation.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Ensure you are using `joblib` version 0.12 or newer, which defaults to the `loky` backend. If issues persist, try setting the `JOBLIB_START_METHOD` environment variable to 'forkserver' (on non-Windows systems) or `backend='threading'` if your tasks are I/O bound.","message":"Joblib's default backend (`loky` since version 0.12) generally handles multiprocessing robustly. However, if explicitly using the `multiprocessing` backend (not recommended for most cases) with certain third-party libraries (e.g., some NumPy/OpenBLAS configurations), it can lead to crashes or deadlocks due to shared memory conflicts.","severity":"gotcha","affected_versions":"Mainly older joblib versions or specific `backend='multiprocessing'` usage."}],"env_vars":null,"search_vec":"'0.0.5':48 'accur':31 'activ':54 'address':26 'appear':51 'bar':21,62 'challeng':28 'comput':41 'context':14 'current':45 'display':30 'easili':17 'execut':24 'integr':18 'interf':35 'joblib':3,6,43,60 'joblib.parallel':23 'librari':10 'maintain':55 'manag':15 'multiprocess':65 'non':34 'non-interf':33 'parallel':40,63 'perform':39 'process':64 'progress':20,36,61 'provid':12 'python':9 'recent':57 'releas':58 'tqdm':2,5,19,59 'tqdm-joblib':1,4 'updat':37 'version':46","created_at":"2026-04-16T18:49:51.522329+00:00","updated_at":"2026-04-16T18:49:51.522329+00:00","problems":{"verify_error":"Traceback (most recent call last):\n  File \"<string>\", line 1, in <module>\n  File \"/tmp/tmphaa3qyas/venv/lib/python3.12/site-packages/tqdm_joblib/__init__.py\", line 3, in <module>\n    import joblib\nModuleNotFoundError: No module named 'joblib'"},"ecosystem":"pypi","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":"0.0.5","cli_name":"","cli_version":null,"type":"library","homepage":"https://stackoverflow.com/a/58936697/5133167","github":"https://github.com/louisabraham/tqdm_joblib","docs":null,"changelog":null,"pypi":"https://pypi.org/project/tqdm-joblib/","npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["workflow","observability"],"base_url":null,"auth_type":null,"provenance":{"verified_status":"import_fail","verified_at":"2026-07-03","last_verified":"2026-07-03","next_check":"2026-07-10","install_tag":null}}