Python is a popular programming language in the field of data analysis due to its versatility, ease of use, and extensive libraries for data manipulation, visualization, and analysis. Here are some key Python skills that are important for data analysts:
1. Basic Python Programming: Understanding basic Python syntax, data types, control structures, functions, and object-oriented programming concepts is essential for data analysis in Python.
2. NumPy: NumPy is a fundamental package for scientific computing in Python. It provides support for large multidimensional arrays and matrices, along with a collection of mathematical functions to operate on these arrays.
3. Pandas: Pandas is a powerful library for data manipulation and analysis in Python. It provides data structures like DataFrames and Series that make it easy to work with structured data and perform tasks such as filtering, grouping, joining, and reshaping data.
4. Matplotlib and Seaborn: Matplotlib is a versatile library for creating static, interactive, and animated visualizations in Python. Seaborn is built on top of Matplotlib and provides a higher-level interface for creating attractive statistical graphics.
5. Scikit-learn: Scikit-learn is a popular machine learning library in Python that provides tools for building predictive models, performing clustering and classification tasks, and evaluating model performance.
6. Jupyter Notebooks: Jupyter Notebooks are an interactive computing environment that allows you to create and share documents containing live code, equations, visualizations, and narrative text. They are commonly used by data analysts for exploratory data analysis and sharing insights.
7. SQLAlchemy: SQLAlchemy is a Python SQL toolkit and Object-Relational Mapping (ORM) library that provides a high-level interface for interacting with relational databases using Python.
8. Regular Expressions: Regular expressions (regex) are powerful tools for pattern matching and text processing in Python. They are useful for extracting specific information from text data or performing data cleaning tasks.
9. Data Visualization Libraries: In addition to Matplotlib and Seaborn, data analysts may also use other visualization libraries like Plotly, Bokeh, or Altair to create interactive visualizations in Python.
10. Web Scraping: Knowledge of web scraping techniques using libraries like BeautifulSoup or Scrapy can be useful for collecting data from websites for analysis.
By mastering these Python skills and applying them to real-world data analysis projects, you can enhance your proficiency as a data analyst and unlock new opportunities in the field.
1. Basic Python Programming: Understanding basic Python syntax, data types, control structures, functions, and object-oriented programming concepts is essential for data analysis in Python.
2. NumPy: NumPy is a fundamental package for scientific computing in Python. It provides support for large multidimensional arrays and matrices, along with a collection of mathematical functions to operate on these arrays.
3. Pandas: Pandas is a powerful library for data manipulation and analysis in Python. It provides data structures like DataFrames and Series that make it easy to work with structured data and perform tasks such as filtering, grouping, joining, and reshaping data.
4. Matplotlib and Seaborn: Matplotlib is a versatile library for creating static, interactive, and animated visualizations in Python. Seaborn is built on top of Matplotlib and provides a higher-level interface for creating attractive statistical graphics.
5. Scikit-learn: Scikit-learn is a popular machine learning library in Python that provides tools for building predictive models, performing clustering and classification tasks, and evaluating model performance.
6. Jupyter Notebooks: Jupyter Notebooks are an interactive computing environment that allows you to create and share documents containing live code, equations, visualizations, and narrative text. They are commonly used by data analysts for exploratory data analysis and sharing insights.
7. SQLAlchemy: SQLAlchemy is a Python SQL toolkit and Object-Relational Mapping (ORM) library that provides a high-level interface for interacting with relational databases using Python.
8. Regular Expressions: Regular expressions (regex) are powerful tools for pattern matching and text processing in Python. They are useful for extracting specific information from text data or performing data cleaning tasks.
9. Data Visualization Libraries: In addition to Matplotlib and Seaborn, data analysts may also use other visualization libraries like Plotly, Bokeh, or Altair to create interactive visualizations in Python.
10. Web Scraping: Knowledge of web scraping techniques using libraries like BeautifulSoup or Scrapy can be useful for collecting data from websites for analysis.
By mastering these Python skills and applying them to real-world data analysis projects, you can enhance your proficiency as a data analyst and unlock new opportunities in the field.
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Lists ๐ Tuples ๐ Dictionaries
What's the difference?
Lists are mutable.
Tuples are immutable.
Dictionaries are associative.
When should you use each?
Lists:
โถ When you want to add or remove elements
โถ When you want to sort elements
โถ When you want to slice elements
Tuples:
โถ When you want a constant object
โถ When you want to send multiple in a function
โถ When you want to return multiple from a function
Dictionaries:
โถ When you want to map keys to values
โถ When you want to loop over the keys
โถ When you want to validate if key exists
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What's the difference?
Lists are mutable.
Tuples are immutable.
Dictionaries are associative.
When should you use each?
Lists:
โถ When you want to add or remove elements
โถ When you want to sort elements
โถ When you want to slice elements
Tuples:
โถ When you want a constant object
โถ When you want to send multiple in a function
โถ When you want to return multiple from a function
Dictionaries:
โถ When you want to map keys to values
โถ When you want to loop over the keys
โถ When you want to validate if key exists
Now, pick your weapon of mass data analysis and become a Python pro!
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7 Must-Have Tools for Data Analysts in 2025:
โ SQL โ Still the #1 skill for querying and managing structured data
โ Excel / Google Sheets โ Quick analysis, pivot tables, and essential calculations
โ Python (Pandas, NumPy) โ For deep data manipulation and automation
โ Power BI โ Transform data into interactive dashboards
โ Tableau โ Visualize data patterns and trends with ease
โ Jupyter Notebook โ Document, code, and visualize all in one place
โ Looker Studio โ A free and sleek way to create shareable reports with live data.
Perfect blend of code, visuals, and storytelling.
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โ SQL โ Still the #1 skill for querying and managing structured data
โ Excel / Google Sheets โ Quick analysis, pivot tables, and essential calculations
โ Python (Pandas, NumPy) โ For deep data manipulation and automation
โ Power BI โ Transform data into interactive dashboards
โ Tableau โ Visualize data patterns and trends with ease
โ Jupyter Notebook โ Document, code, and visualize all in one place
โ Looker Studio โ A free and sleek way to create shareable reports with live data.
Perfect blend of code, visuals, and storytelling.
React with โค๏ธ for free tutorials on each tool
Share with credits: https://t.iss.one/sqlspecialist
Hope it helps :)
โค2
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Free Resources for Python
Codebasics python tutorials (first 16) โ
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Practice Python course
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Codebasics python HINDI tutorials โ
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Useful Python resources for beginners
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Codebasics python tutorials (first 16) โ
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Practice Python course
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Codebasics python HINDI tutorials โ
https://www.youtube.com/playlist?list=PLPbgcxheSpE1DJKfdko58_AIZRIT0TjpO
Useful Python resources for beginners
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Python 3 Book for beginners
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๐ Essential Python snippets to explore data:
1. .head() - Review top rows
2. .tail() - Review bottom rows
3. .info() - Summary of DataFrame
4. .shape - Shape of DataFrame
5. .describe() - Descriptive stats
6. .isnull().sum() - Check missing values
7. .dtypes - Data types of columns
8. .unique() - Unique values in a column
9. .nunique() - Count unique values
10. .value_counts() - Value counts in a column
11. .corr() - Correlation matrix
1. .head() - Review top rows
2. .tail() - Review bottom rows
3. .info() - Summary of DataFrame
4. .shape - Shape of DataFrame
5. .describe() - Descriptive stats
6. .isnull().sum() - Check missing values
7. .dtypes - Data types of columns
8. .unique() - Unique values in a column
9. .nunique() - Count unique values
10. .value_counts() - Value counts in a column
11. .corr() - Correlation matrix
โค4
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Python for Data Analytics - Quick Cheatsheet with Cod e Example ๐
1๏ธโฃ Data Manipulation with Pandas
2๏ธโฃ Numerical Operations with NumPy
3๏ธโฃ Data Visualization with Matplotlib & Seaborn
4๏ธโฃ Exploratory Data Analysis (EDA)
5๏ธโฃ Working with Databases (SQL + Python)
React with โค๏ธ for more
Share with credits: https://t.iss.one/sqlspecialist
Hope it helps :)
1๏ธโฃ Data Manipulation with Pandas
import pandas as pd
df = pd.read_csv("data.csv")
df.to_excel("output.xlsx")
df.head()
df.info()
df.describe()
df[df["sales"] > 1000]
df[["name", "price"]]
df.fillna(0, inplace=True)
df.dropna(inplace=True)
2๏ธโฃ Numerical Operations with NumPy
import numpy as np
arr = np.array([1, 2, 3, 4])
print(arr.shape)
np.mean(arr)
np.median(arr)
np.std(arr)
3๏ธโฃ Data Visualization with Matplotlib & Seaborn
import matplotlib.pyplot as plt
plt.plot([1, 2, 3, 4], [10, 20, 30, 40])
plt.bar(["A", "B", "C"], [5, 15, 25])
plt.show()
import seaborn as sns
sns.heatmap(df.corr(), annot=True)
sns.boxplot(x="category", y="sales", data=df)
plt.show()
4๏ธโฃ Exploratory Data Analysis (EDA)
df.isnull().sum()
df.corr()
sns.histplot(df["sales"], bins=30)
sns.boxplot(y=df["price"])
5๏ธโฃ Working with Databases (SQL + Python)
import sqlite3
conn = sqlite3.connect("database.db")
df = pd.read_sql("SELECT * FROM sales", conn)
conn.close()
cursor = conn.cursor()
cursor.execute("SELECT AVG(price) FROM products")
result = cursor.fetchone()
print(result)
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โค12
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