Code Snippets

Code Snippets for Data Engineering, Data Science, Probability, and Machine Learning and More

Unix

Read file line by line

Pandas

Sorting Dataframe By Value
Sorting Dataframe By Multiple Values
Sorting Dataframe By Row Index
Sorting Dataframe By Column Index
Pandas Apply Row Level
Pandas Apply Using Lambda Expression
Pandas Groupby Text Group Concat
Pandas Groupby Aggregation Multiple Compute Functions
Pandas Groupby with Different Aggregation Functions
Splitting a Column to Multiple Columns
Pandas Series Frequency Value Counts
Filter Dataframe by Column Frequency with value counts

Command Line Tools

find and replace with sed
History with last n commands
Recursive Grep by file type
grep matching
Create multiple subdirectories
Simple Arithmetic with bc

Distance Metrics

Euclidean Distance
Cosine Similarity
Minkowski Distance