Вивчайте Streaming Data Processing | Working with Large Datasets

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When working with very large datasets, you often face situations where it is impractical or impossible to load all the data into memory at once. In these cases, streaming data processing becomes an essential technique. Instead of reading the entire dataset in one go, you read and process data in manageable pieces as it arrives or as you retrieve it from storage. This approach is especially useful when dealing with live data feeds, massive log files, or any workflow where data is continuously generated or updated.

Iterating over data streams allows you to process each record or chunk of data sequentially, applying transformations, aggregations, or filtering on-the-fly. You should use this approach when your data size exceeds your system's memory limits, when you want to minimize memory usage, or when you need to react to incoming data in real time. Streaming is also valuable for workflows that require early results or need to process data as soon as it is available, such as fraud detection or monitoring applications.


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import pandas as pd

# Suppose 'large_dataset.csv' is too big to fit in memory
chunk_size = 10000  # Number of rows per chunk

for chunk in pd.read_csv('large_dataset.csv', chunksize=chunk_size):
    # Process each chunk as it is read
    # For demonstration, count the number of rows in each chunk
    print(f"Processing chunk with {len(chunk)} rows")
    # You can add more processing logic here as needed

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