갈루아의 반서재

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Introducing tqdm

tqdm 는 즉석에서 progress bar 를 생성해주고, 함수나 반복문의 TTC (Time To Completion) 를 예측하는 파이썬 패키지를 말한다.

from tqdm import tqdm_notebook
list = []
for x in tqdm_notebook(range(10000)):
    list.append(x**x)   

pip 를 이용해서 다음과 같이 간단히 설치가 가능하다.

(AnnaM) founder@hilbert:~$ pip install tqdm
Collecting tqdm
  Downloading https://files.pythonhosted.org/packages/e1/c1/bc1dba38b48f4ae3c4428aea669c5e27bd5a7642a74c8348451e0bd8ff86/tqdm-4.36.1-py2.py3-none-any.whl (52kB)
     |████████████████████████████████| 61kB 2.2MB/s
Installing collected packages: tqdm
Successfully installed tqdm-4.36.1

Conda 를 사용중인 경우 다음과 같이 설치할 수 있다.

(AnnaM) founder@hilbert:~$ conda install -c conda-forge tqdm
Collecting package metadata: done
Solving environment: done

## Package Plan ##

  environment location: /home/founder/anaconda3/envs/AnnaM

  added / updated specs:
    - tqdm


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    tqdm-4.36.1                |             py_0          43 KB  conda-forge
    ------------------------------------------------------------
                                           Total:          43 KB

The following NEW packages will be INSTALLED:

  tqdm               conda-forge/noarch::tqdm-4.36.1-py_0


Proceed ([y]/n)? y


Downloading and Extracting Packages
tqdm-4.36.1          | 43 KB     | ######################################################## | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done

 

Using tqdm

tqdm 사용 역시 간단하다. 다음과 같이 임포트하기만 하면 된다.

from tqdm import tqdm, tqdm_notebook

코드 내의 함수나 반복문을  tdqm() 또는 tqdm_notebook() 로 감싸기만 하면 된다. 

from tqdm import tnrange, tqdm_notebook
from time import sleep

for i in tqdm_notebook(range(4), desc='1st loop'):
    for j in tqdm_notebook(range(100), desc='2nd loop', leave=False):
        sleep(0.01)

 

But what about .apply() functions in pandas?

tqdm 을 임포트했으면, tqdm.pandas() 을 초기화가 가능하다.

from tqdm._tqdm_notebook import tqdm_notebook
tqdm_notebook.pandas()

그리고 .apply() 함수를 .progress_apply() 로 교체하면 된다.

import pandas as pd
import numpy as np

df = pd.DataFrame(np.random.randint(0,100,(10000, 1000)))
df.progress_apply(lambda x: x**2)

 

원문소스 https://towardsdatascience.com/progress-bars-in-python-and-pandas-f81954d33bae

 

Progress Bars in Python (and pandas!)

Time and estimate the progress of your functions in Python (and pandas!)

towardsdatascience.com

 

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