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NumPy vs. Pandas, and other flavors (Dask, Modin, Ray)

NumPy NumPy is a Python library for numerical computing that offers multi-dimensional arrays and indices as data structures and additional high-level math utilities. ndarray The unique offering of NumPy is the ndarray data structure, which stands for n-dimensional array.

2022年5月26日

Python Essentials

... machine running the Python code. Duck Typing TODO Data Structures Empty array list = [] Array with values list = [1, 2, 3] Empty hash map hashmap = {} Hash map with values hashmap = {'a': 'b'} Empty set s = set() Set with values s = set([1, 2, 3]) Min heap import heapq q = [] heapq.

2019年4月3日

DataFrames (a software engineer's perspective)

... one type of metadata would be the column name. In comparison, a traditional 2-dimensional array does not contain column or row specific metadata. DataFrames are quite helpful in this regard, but the additional metadata also means more memory overhead.

2022年5月2日

Big Data Cheat Sheet

Data Warehousing Software Hadoop Apache Hadoop is a framework for large-scale, distributed jobs that consists of these main components: MapReduce: jobs are distributed into a group of mapper tasks and then reduced (combined) into a single output HDFS: A distributed file system used by Hadoop, which is shared across the Hadoop cluster.

2024年9月3日