What does the symbol numpy:: stand for?

what does this mean? Baidu can"t find it either: see this symbol and don"t understand what it means, not traditional slicing

Mar.16,2021

this unrecorded version should be start: end: step
Python list slices are 1 inch, numpy can do 2 slices, and the middle bean number is to separate rows and cols

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MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b38a1d-2b8a7.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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