Frequently Used Snippets

I don’t know how many times I had to google for commands or code snippets I used before. People use differents methods to tackle this problem. Some people master the command line history search and others keep the most frequently used commands in a file to copy easily. Personally, I find it nice to have my favorite commands or snippets in one place. I want to share some of them here.

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CLI

• General, Cloud, Git

Snippets

• Data Science

Shortcuts

• Jupyter Notebook

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CLI

General

• Create a virtual environment and install dependencies in your project

  python3 -m venv FILENAME
  source FILENAME/bin/activate
  pip install -r requirements.txt
  

Cloud

• Authenticate to Google Cloud SDK and set your project

  gcloud auth login     # It redirects to browser, confirm to allow it
  gcloud config set project PROJECTID
  

• Deploy your project to Google App Engine via Google Cloud SDK.

  gcloud app deploy app.yaml --project PROJECTID 
  

• Monitor logs from your GAE app Google Cloud SDK.

  gcloud app logs tail -s default
  

Git

• Change Git language to English (one time)

  LC_ALL=C git status
  

Snippets

Data Science

• Select categorical columns with relatively low cardinality

  low_cardinality_cols = [cname for cname in X_train.columns if X_train[cname].nunique() < 10 and 
                          X_train[cname].dtype == "object"]
  

• Select numeric columns

  numeric_cols = [cname for cname in X_train.columns if X_train[cname].dtype in ['int64', 'float64']]
  

Shortcuts

Jupyter Notebook

• Insert a cell below: b (while the cell is blue)
• Delete a selected cell: dd (while the cell is blue)