flake8 설치하기

1. flake8 설치하기

(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ » conda create -n haha python=3.7
Collecting package metadata (current_repodata.json): done
Solving environment: done


==> WARNING: A newer version of conda exists. <==
  current version: 4.7.12
  latest version: 4.8.1

Please update conda by running

    $ conda update -n base -c defaults conda



## Package Plan ##

  environment location: /Users/marie/miniconda3/envs/haha

  added / updated specs:
    - python=3.7


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    ca-certificates-2020.1.1   |                0         125 KB
    pip-20.0.2                 |           py37_1         1.7 MB
    wheel-0.34.1               |           py37_0          50 KB
    ------------------------------------------------------------
                                           Total:         1.8 MB

The following NEW packages will be INSTALLED:

  ca-certificates    pkgs/main/osx-64::ca-certificates-2020.1.1-0
  certifi            pkgs/main/osx-64::certifi-2019.11.28-py37_0
  libcxx             pkgs/main/osx-64::libcxx-4.0.1-hcfea43d_1
  libcxxabi          pkgs/main/osx-64::libcxxabi-4.0.1-hcfea43d_1
  libedit            pkgs/main/osx-64::libedit-3.1.20181209-hb402a30_0
  libffi             pkgs/main/osx-64::libffi-3.2.1-h475c297_4
  ncurses            pkgs/main/osx-64::ncurses-6.1-h0a44026_1
  openssl            pkgs/main/osx-64::openssl-1.1.1d-h1de35cc_3
  pip                pkgs/main/osx-64::pip-20.0.2-py37_1
  python             pkgs/main/osx-64::python-3.7.6-h359304d_2
  readline           pkgs/main/osx-64::readline-7.0-h1de35cc_5
  setuptools         pkgs/main/osx-64::setuptools-45.1.0-py37_0
  sqlite             pkgs/main/osx-64::sqlite-3.30.1-ha441bb4_0
  tk                 pkgs/main/osx-64::tk-8.6.8-ha441bb4_0
  wheel              pkgs/main/osx-64::wheel-0.34.1-py37_0
  xz                 pkgs/main/osx-64::xz-5.2.4-h1de35cc_4
  zlib               pkgs/main/osx-64::zlib-1.2.11-h1de35cc_3


Proceed ([y]/n)? y


Downloading and Extracting Packages
ca-certificates-2020 | 125 KB    | ############################################## | 100%
wheel-0.34.1         | 50 KB     | ############################################## | 100%
pip-20.0.2           | 1.7 MB    | ############################################## | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
#
# To activate this environment, use
#
#     $ conda activate haha
#
# To deactivate an active environment, use
#
#     $ conda deactivate

(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ »
(base) marie@MarieJungui-MacBookPro:~ » conda activate haha
(haha) marie@MarieJungui-MacBookPro:~ »
(haha) marie@MarieJungui-MacBookPro:~ » pip freeze
certifi==2019.11.28
(haha) marie@MarieJungui-MacBookPro:~ »
(haha) marie@MarieJungui-MacBookPro:~ »
(haha) marie@MarieJungui-MacBookPro:~ » pip install flake8
Collecting flake8
  Using cached flake8-3.7.9-py2.py3-none-any.whl (69 kB)
Collecting pycodestyle<2.6.0,>=2.5.0
  Using cached pycodestyle-2.5.0-py2.py3-none-any.whl (51 kB)
Collecting entrypoints<0.4.0,>=0.3.0
  Using cached entrypoints-0.3-py2.py3-none-any.whl (11 kB)
Collecting mccabe<0.7.0,>=0.6.0
  Using cached mccabe-0.6.1-py2.py3-none-any.whl (8.6 kB)
Collecting pyflakes<2.2.0,>=2.1.0
  Using cached pyflakes-2.1.1-py2.py3-none-any.whl (59 kB)
Installing collected packages: pycodestyle, entrypoints, mccabe, pyflakes, flake8
Successfully installed entrypoints-0.3 flake8-3.7.9 mccabe-0.6.1 pycodestyle-2.5.0 pyflakes-2.1.1
(haha) marie@MarieJungui-MacBookPro:~ »
(haha) marie@MarieJungui-MacBookPro:~ » pip freeze
certifi==2019.11.28
entrypoints==0.3
flake8==3.7.9
mccabe==0.6.1
pycodestyle==2.5.0
pyflakes==2.1.1
(haha) marie@MarieJungui-MacBookPro:~ »

2. flake8 사용하기

(haha) marie@MarieJungui-MacBookPro:~/haha » vi test.py
(haha) marie@MarieJungui-MacBookPro:~/haha »
(haha) marie@MarieJungui-MacBookPro:~/haha » flake8 test.py
test.py:4:1: E305 expected 2 blank lines after class or function definition, found 1
test.py:5:2: E225 missing whitespace around operator
test.py:6:2: E225 missing whitespace around operator
(haha) marie@MarieJungui-MacBookPro:~/haha »                                         1 ↵
(haha) marie@MarieJungui-MacBookPro:~/haha »