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PISuma en dataframes pandas. #python #programacion #pandaspython #dataframe
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#Pandas Dataframe
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DESave this for later!π
From raw export to Pandas DataFrame. πβ‘οΈπ
My go-to workflow for moving Apple Health data into a usable format:
π οΈ healthkit-to-sqlite for the conversion.
π Beekeeper Studio for schema cleanup.
π Pandas + Google Colab for the final analysis.
Follow @devanddesigns for more!π«ΆπΌ
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#python #pandas #datascience #applehealth #learntocode
@devanddesigns
5.3K
BAPandas Basics you must understand.
At the center of Pandas is the DataFrame.
Think of it as a smart table:
β’ Rows = records
β’ Columns = features
β’ Index = identity of each row
Every ML dataset you use
is usually a DataFrame.
Understand this structure,
and data manipulation becomes easy.
SAVE this before working with real datasets.
#pandas
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#datascience
#machinelearning
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@bakwaso_pedia
4.4K
BRConoscevi questo metodo ?
#pandas #datascience #dataframe #data #bigdata #dati #datanalysis #ai #python #informatica #ingegneria #ingegneriainformatica #Pythontrick #trick #coding #code #programmazione #programma #tabella #table
@brainlink_
331.4K
SHPython Interview Questions for Data/Business Analysts:
Question 1:Β Β
Given a dataset in a CSV file, how would you read it into a Pandas DataFrame? And how would you handle missing values?
Question 2:Β
Describe the difference between a list, a tuple, and a dictionary in Python. Provide an example for each.
Question 3:
Imagine you are provided with two datasets, 'sales_data' and 'product_data', both in the form of Pandas DataFrames. How would you merge these datasets on a common column named 'ProductID'?
Question 4:Β Β
How would you handle duplicate rows in a Pandas DataFrame? Write a Python code snippet to demonstrate.
Question 5:Β Β
Describe the difference between '.iloc[] and '.loc[]' in the context of Pandas.
Question 6:Β Β
In Python's Matplotlib library, how would you plot a line chart to visualize monthly sales? Assume you have a list of months and a list of corresponding sales numbers.
Question 7:Β
How would you use Python to connect to a SQL database and fetch data into a Pandas DataFrame?
Question 8:Β Β
Explain the concept of list comprehensions in Python. Can you provide an example where it's useful for data analysis?
Question 9:
How would you reshape a long-format DataFrame to a wide format using Pandas? Explain with an example.
Question 10:
What are lambda functions in Python? How are they beneficial in data wrangling tasks?
Question 11:Β Β
Describe a scenario where you would use the 'groupby()' method in Pandas. How would you aggregate data after grouping?
Question 12:Β Β
You are provided with a Pandas DataFrame that contains a column with date strings. How would you convert this column to a datetime format? Additionally, how would you extract the month and year from these datetime objects?
Question 13:Β
Explain the purpose of the 'pivot_table' method in Pandas and describe a business scenario where it might be useful.
Question 14:
How would you handle large datasets that don't fit into memory? Are you familiar with Dask or any similar libraries?
Question 15:Β Β
In a dataset, you observe that some numerical columns are highly skewed. How can you normalize or transform these columns using Python?
#dataanalyst #data #python #datascience #dataa
@shakra.shamim
5.2K
CLFollow @cloud_x_berry for more info
#Pandas #DataScience #Python #DataAnalysis #LearnPython
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@cloud_x_berry
131.0K
SAPandas isnβt slow. Your code is. Hereβs whatβs secretly killing your performance:
1οΈβ£ Youβre Using apply() on a DataFrame
This is the #1 Pandas mistake.
β’ apply() is essentially a slow Python loop
β’ It doesnβt leverage vectorisation
df[βAβ] + df[βBβ]
π Vectorized operations can be 10β100x faster.
2οΈβ£ Youβre Growing a DataFrame Inside a Loop
Avoid using append() or pd.concat() repeatedly in a loop.
β’ Each iteration copies the entire DataFrame
β’ This leads to O(nΒ²) time complexity
β
Better approach:
β’ Collect data in a list
β’ Create the DataFrame once:
data = []
# append rows to list
df = pd.DataFrame(data)
π This alone can save minutes of execution time.
3οΈβ£ Youβre Loading Unnecessary Data
Donβt blindly load entire datasets.
pd.read_csv(βhuge_file.csvβ, usecols=[βAβ, βBβ, βCβ])
π Loading only required columns:
β’ Reduces memory usage
β’ Speeds up I/O significantly
4οΈβ£ Youβre Not Using Categorical Data Types
If a column has repeated string values (e.g., country, gender):
df[βcolβ] = df[βcolβ].astype(βcategoryβ)
π Benefits:
β’ Up to 10x less memory usage
β’ Faster groupby and aggregations
5οΈβ£ (Often Missed) Youβre Not Vectorizing String or Datetime Operations
Using Python loops for:
β’ String processing
β’ Datetime parsing
df[βcolβ].str.lower()
df[βdateβ] = pd.to_datetime(df[βdateβ])
6οΈβ£ Inefficient groupby / merge Usage
β’ Large joins without indexing can be slow
β’ Repeated groupby operations are expensive
π Optimize by:
β’ Sorting / indexing before joins
β’ Reducing repeated computations
7οΈβ£ Not Using Chunking for Large Files
For very large datasets:
pd.read_csv(βfile.csvβ, chunksize=10000)
π Prevents memory overload and improves performance.
π‘ Key Insight
Pandas is optimized in C under the hood.
The moment you fall back to Python loops, you lose all that performance.
Stop blaming Pandas. Start fixing your patterns.
(Pandas Optimization, Vectorization, apply vs vectorization, DataFrame Performance, Python Performance, Data Processing, Memory Optimization, Efficient Coding, GroupBy Optimization, Large Dataset Handling)
#techinterviews #pandas #python
@sagar_695
7.9K
CO@codingdidi β Question-3
ππ»ππ»This approach works by using the strftime method to format the datetime values in the βDateβ column to the year and month (β%Y-%mβ) and then comparing them to the specified month string. Similarly, you can also use df[df[βDateβ]. dt. strftime(β%Yβ)==β2021β] method to filter by year.
In order to select rows between two dates in Pandas DataFrame, first, create a boolean mask using mask = (df[βInsertedDatesβ] > start_date) & (df[βInsertedDatesβ] <= end_date) to represent the start and end of the date range. Then you select the DataFrame that lies within the range using the DataFrame. loc[] method.
save it for later π
β
follow @codingdidi for more informational content.
data, Data analyst, Data science, scientific, scientist, data manipulation, Data collection, Data generation, statistics, statistical analysis, Engineering, engineer, engineers, computer science, BCA, ee, ece, computer applications, code, coders, coder, software engineers, engineers, analysts, analysis, scientist, science
#data #datascience #dataanalytics #datascientist #pandas #pandas #python #python3 #pythonprogramming #pythoncode #engineering #engineer #engineers #life #code #coder #coding #learn #free #freelearning
@codingdidi
145.2K
DABoost Your Data Analysis Skills! ππ
Check out these incredibly useful Python functions that will take your data analysis skills to the next level! πͺπ»
1οΈβ£ Pandas: `read_csv()` π
Import data from CSV files with ease! ππ Pandasβ `read_csv()` function lets you effortlessly load data into a DataFrame, allowing you to manipulate and analyze it with just a few lines of code. ππ‘
2οΈβ£ NumPy: `mean()` and `std()` π
Need to calculate the mean or standard deviation of a dataset? Look no further! NumPyβs `mean()` and `std()` functions provide efficient ways to compute these statistical measures, helping you gain insights into your dataβs central tendency and variability. ππ
3οΈβ£ Matplotlib: `plot()` π
Visualize your data like a pro! πποΈβπ¨οΈ Matplotlibβs `plot()` function enables you to create stunning charts and plots, allowing you to communicate your findings effectively. From line plots to scatter plots, the possibilities are endless! ππ
4οΈβ£ Seaborn: `heatmap()` π‘οΈ
Uncover patterns and correlations in your data! π𧩠Seabornβs `heatmap()` function generates beautiful heatmaps, highlighting relationships between variables in a visually appealing way. Perfect for exploring complex datasets and identifying trends at a glance! ππ₯
5οΈβ£ Scikit-learn: `train_test_split()` π₯π
Preparing your data for machine learning? Scikit-learnβs `train_test_split()` function is here to help! π€π It splits your dataset into training and testing sets, ensuring you have the right data for model training and evaluation. Get ready to build powerful predictive models! ππ‘
Follow @datapatashala_official
#PythonForDataAnalysis #DataScience #DataAnalysis #PythonFunctions #DataSkills #datascience #dataanalysis #excel #python #sql
@datapatashala_official
55.0K
HAπ Mastering Data Analysis with Pandas πΌ
Here are some essential Pandas functions to level up your data manipulation skills:
β‘οΈ df.dropna() β
β
Remove missing values from your DataFrame.
β‘οΈ df.fillna() π
β
Fill missing values with specified data.
β‘οΈ df.describe() π
β
Get a summary of statistics for numerical columns.
β‘οΈ df.sort_values() π
β
Sort your DataFrame by the values of a column.
β‘οΈ df.groupby() π
β
Group data by specified columns for aggregation.
β‘οΈ df.apply() π§
β
Apply a function along an axis of the DataFrame.
β‘οΈ df.append() β
β
Append rows of another DataFrame.
β‘οΈ df.join() π€
β
Join columns from another DataFrame.
β‘οΈ df.rename() π·οΈ
β
Rename columns in your DataFrame.
β‘οΈ df.set_index() π
β
Set a column as the index of the DataFrame.
β‘οΈ df.to_csv() πΎ
β
Export your DataFrame to a CSV file.
Start leveraging these functions to handle your data more efficiently! π
#DataScience #Pandas #DataAnalysis #Python #Coding #MachineLearning #BigData
@hariharan.tech
370
PYπ Day 15 of Pandas is all about plotting with ease!
Whether it's line charts, bar graphs, or more β Pandas makes visualizing your data super simple! π―
Master the art of quick data visuals today! π
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#PythonCode (m) #PlottingBasics (s) #PandasSeries (s) #PythonVisualization (l) #DailyPython (s)
@pythonfullstackcamp
64.4K
FUβDuckDB β Data Scientist ka Pocket Knife π¦πͺβ
π» Bina Hadoop/Spark ke bhi bada data analyze karna possible hai!
π Solution hai DuckDB β ek lightweight SQL database jo laptop par hi analytics kar deta haiΰ₯€
π Kya milega DuckDB se?
β CSV, Parquet aur Pandas DataFrame par direct SQL queries
β GBs data β seconds me filter β‘
β Zero setup β bas pip install duckdb aur shuru ho jao
β SQLite jaisa lightweight, par analytics ke liye super fast
Matlab β chhoti machine, bada kaam!
DuckDB = Pocket Data Warehouse π¦πΎ
#DuckDB #DataAnalytics #BigDataSimplified #SQLTools
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@fullstackraju
β¨ #Pandas Dataframe Discovery Guide
Instagram hosts thousands of posts under #Pandas Dataframe, creating one of the platform's most vibrant visual ecosystems. This massive collection represents trending moments, creative expressions, and global conversations happening right now.
Discover the latest #Pandas Dataframe content without logging in. The most impressive reels under this tag, especially from @shakra.shamim, @datapatashala_official and @sagar_695, are gaining massive attention. View them in HD quality and download to your device.
What's trending in #Pandas Dataframe? The most watched Reels videos and viral content are featured above. Explore the gallery to discover creative storytelling, popular moments, and content that's capturing millions of views worldwide.
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