Python for Data Analysts

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Practice projects to consider: 1. Implement a basic search engine: Read a set of documents and build an index of keywords. Then, implement a search function that returns a list of documents that match the query. 2. Build a recommendation system: Read a set of user-item interactions and build a recommendation system that suggests items to users based on their past behavior. 3. Create a data analysis tool: Read a large dataset and implement a tool that performs various analyses, such as calculating summary statistics, visualizing distributions, and identifying patterns and correlations. 4. Implement a graph algorithm: Study a graph algorithm such as Dijkstra's shortest path algorithm, and implement it in Python. Then, test it on real-world graphs to see how it performs.

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Reverse a list in Python

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Python #Pandas Cheat Sheet 🐼

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𝐈𝐦𝐩𝐨𝐫𝐭𝐢𝐧𝐠 𝐍𝐞𝐜𝐞𝐬𝐬𝐚𝐫𝐲 𝐋𝐢𝐛𝐫𝐚𝐫𝐢𝐞𝐬: import pandas as pd import numpy as np import matplotlib.pyplot as plt import seaborn as sns 𝐋𝐨𝐚𝐝𝐢𝐧𝐠 𝐭𝐡𝐞 𝐃𝐚𝐭𝐚𝐬𝐞𝐭: df = pd.read_csv('your_dataset.csv') 𝐈𝐧𝐢𝐭𝐢𝐚𝐥 𝐃𝐚𝐭𝐚 𝐈𝐧𝐬𝐩𝐞𝐜𝐭𝐢𝐨𝐧: 1- View the first few rows: df.head() 2- Summary of the dataset: df.info() 3- Statistical summary: df.describe() 𝐇𝐚𝐧𝐝𝐥𝐢𝐧𝐠 𝐌𝐢𝐬𝐬𝐢𝐧𝐠 𝐕𝐚𝐥𝐮𝐞𝐬: 1- Identify missing values: df.isnull().sum() 2- Visualize missing values: sns.heatmap(df.isnull(), cbar=False, cmap='viridis') plt.show() 𝐃𝐚𝐭𝐚 𝐕𝐢𝐬𝐮𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧: 1- Histograms: df.hist(bins=30, figsize=(20, 15)) plt.show() 2 - Box plots: plt.figure(figsize=(10, 6)) sns.boxplot(data=df) plt.xticks(rotation=90) plt.show() 3- Pair plots: sns.pairplot(df) plt.show() 4- Correlation matrix and heatmap: correlation_matrix = df.corr() plt.figure(figsize=(12, 8)) sns.heatmap(correlation_matrix, annot=True, cmap='coolwarm') plt.show() 𝐂𝐚𝐭𝐞𝐠𝐨𝐫𝐢𝐜𝐚𝐥 𝐃𝐚𝐭𝐚 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬: Count plots for categorical features: plt.figure(figsize=(10, 6)) sns.countplot(x='categorical_column', data=df) plt.show() Python Interview Q&A: https://topmate.io/coding/898340 Like for more ❤️ ENJOY LEARNING 👍👍

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Python Cheatsheet ✅

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Important Methods in #Pandas Package https://t.me/CodeProgrammer ✅

Pandas Functions for Data Analysis

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