Scrapy 1.2 Documentationlike JSON Lines: scrapy crawl quotes -o quotes.jl The JSON Lines format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 266 页 | 1.10 MB | 1 年前3
Scrapy 1.1 Documentationlike JSON Lines: scrapy crawl quotes -o quotes.jl The JSON Lines format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 260 页 | 1.12 MB | 1 年前3
Scrapy 1.3 Documentationlike JSON Lines: scrapy crawl quotes -o quotes.jl The JSON Lines format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 272 页 | 1.11 MB | 1 年前3
Scrapy 1.1 Documentationscrapy crawl quotes -o quotes.jl The JSON Lines [http://jsonlines.org] format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 322 页 | 582.29 KB | 1 年前3
Scrapy 1.5 Documentationlike JSON Lines: scrapy crawl quotes -o quotes.jl The JSON Lines format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 285 页 | 1.17 MB | 1 年前3
Scrapy 1.6 Documentationlike JSON Lines: scrapy crawl quotes -o quotes.jl The JSON Lines format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 295 页 | 1.18 MB | 1 年前3
Scrapy 1.2 Documentationscrapy crawl quotes -o quotes.jl The JSON Lines [http://jsonlines.org] format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 330 页 | 548.25 KB | 1 年前3
Scrapy 1.3 Documentationscrapy crawl quotes -o quotes.jl The JSON Lines [http://jsonlines.org] format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 339 页 | 555.56 KB | 1 年前3
Scrapy 1.4 Documentationlike JSON Lines: scrapy crawl quotes -o quotes.jl The JSON Lines format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 281 页 | 1.15 MB | 1 年前3
Scrapy 1.4 Documentationscrapy crawl quotes -o quotes.jl The JSON Lines [http://jsonlines.org] format is useful because it’s stream-like, you can easily append new records to it. It doesn’t have the same problem of JSON when you serialization format, but it doesn’t scale well for large amounts of data since incremental (aka. stream-mode) parsing is not well supported (if at all) among JSON parsers (on any language), and most of just parse the entire object in memory. If you want the power and simplicity of JSON with a more stream-friendly format, consider using JsonLinesItemExporter instead, or splitting the output in multiple0 码力 | 353 页 | 566.69 KB | 1 年前3
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