General Python Tool

▶ p/x is better way to print(x)

p/x will print(x) and return x

💡 Note: p/x is easy to print value in expression.

▶ Use g.name = x or g.name/x to transport variable to Python interactive console

💡 Note:

• gg is the meaning of “to Global and log”, has same usage as g, but gg will print the transported variable.
• if variable name exists in console before, the variable’s value will be covered by new value.

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▶ g() to transport all vars that in the function to Python interactive console

💡 Note: g() is a useful tool for debug. import boxx.g is convenient way to use g() instead of from boxx import g;g()(import boxx.gg is avaliable too)

▶ with p, with g, with gg are mulit variables version of p, g, gg that work under “with statement”

Only act on interested variables which is under “with statement”

💡 Note:

• with p, with g, with gg only act on assignment variables under “with statement”.

• If variable’s name exists in locals() before and id(variable) not change ,variable may not be detected
  

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Scientific Computing and Computer Vision

Useful tools in Scientific Computing and Computer Vision field. All tools support array-like types, include numpy, torch.tensor, mxnet.ndarray, PIL.Image .etc

💡 Note: If you are using ssh to execute code on a remote server, it is recommended that ssh plus -X make visualized plt charts can be transferred to the local and display, like ssh -x user@host.

▶ loga to visualization matrix and tensor

loga is short of “log array”, loga will show many attributes of array-like object.

💡 Note: loga analysis array-like object by it’s shape, max, min, mean, and distribute. Support numpy, torch.tensor, mxnet.ndarray, PIL.Image .etc

▶ show is easy to do imshow, even images are in complex struct

show could find every image in complex struct and imshow they.

💡 Note: if args inculde function(like torgb). those functions will process all numpys befor imshow.

▶ tree for visualization complex struct

like tree command in shell, boxx.tree could visualization any struct in tree struct view.

💡 Note: tree support types include list, tuple, dict, numpy, torch.tensor/Dataset/DataLoader, mxnet.ndarray, PIL.Image.etc

▶ boxx debug tool matrix

💡 Note:

• transport mean “transport variable to Python interactive console”
• All locals() mean operation will act on all variables in the function or module
• All locals()_2 : when boxx are not imported, import boxx.{operation} is a convenient way to execution operation
  
  
  
  

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▶ what to know “What’s this?”

💡 Note: what(x) will show “what is x?” by pretty print it’s Self, Document, Father Classes, Inner Struct and Attributes. It is a supplement of help(x).

▶ timeit is convenient timing tool

💡 Note: timeit will timing code block under “with statement” and print spend time in blue color.

▶ mapmp is Multi Process version of map

mapmp is the meaning of “MAP for Multi Process”, has the same usage as map but faster.

💡 Note:

• pool parameter in mapmp mean the number of Process, the default is the number of CPUs in the system.
• In multi process programs, display processing progress is troublesome. printfreq parameter in mapmp can handle this problem.
• Like map, mapmp support muliti args to as input to function, like mapmp(add, list_1, list_2).
• • It’s better to run multi process under __name__ == '__main__' environment.
• If you speed up the numpy program, note that in the MKL version of numpy, multiple processes will be slower. You can run boxx.testNumpyMultiprocessing() to test how friendly the current environment is to a multi-process numpy.
  
  
  
  

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▶ heatmap to show the time heat map of your code

💡 Note: heatmap also support python code string.

▶ performance could statistic function calls and visualize code performance

💡 Note: performance also support python code string.