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What is a Python Dictionary

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Python Dictionary Python Dictionary¶ Dictionary is a method in which data is stored in pairs of keys and values. These are also called Associative Arrays in other programming languages. What is key-value pair?¶ key is a unique identifier for a given record. Values are data stored in that identifier. For example, Let us say that

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Getting Started with Data Visualization in Python Pandas

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DOWNLOAD DATASETS¶ To download the datasets used in this tutorial, pleas see the following links 1. gapminder.tsv 2. pew.csv 3. billboard.csv 4. ebola.csv 5. tips.csv TED Talk Dataset Excercises¶ In [5]: # Change directory In [6]: cd "D:\Dropbox\CLASSES\Data Science for Finance\Python\Lecture 1 – Assignment" D:\Dropbox\CLASSES\Data Science for Finance\Python\Lecture 1 – Assignment In [7]: import pandas as pd In [8]:

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asrol Cumulative Returns Over 12-months, skipping the Current month

Anomaly Hunters has asked: How Can I find cumulative returns from month T-1 to T-12, i.e. not including the current month in the calculation. I want to do it on a rolling window for each firm. Let us use a small dataset. We shall create this dataset in Stata with the following code clear input

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