Welcome to Tubing’s documentation!¶

Tubing is a Python I/O library. What makes tubing so freakin’ cool is the gross abuse of the bit-wise OR operator (|). Have you ever been writing python code and thought to yourself, “Man, this is great, but I really wish it was a little more like bash.” Whelp, we’ve made python a little more like bash.If you are a super lame nerd-kid, you can replace any of the bit-wise ORs with the tube() function and pray we don’t overload any other operators in future versions. Here’s how you install tubing:

$ pip install tubing

Tubing is pretty bare-bones at the moment. We’ve tried to make it easy to add your own functionality. Hopefully you find it not all that unpleasant. There are three sections below for adding sources, tubes and sink. If you do make some additions, think about committing them back upstream. We’d love to have a full suite of tools.

Now, witness the power of this fully operational I/O library.

from tubing import sources , tubes , sinks objs = [ dict ( name = "Bob Corsaro" , birthdate = "08/03/1977" , alignment = "evil" , ), dict ( name = "Tom Brady" , birthdate = "08/03/1977" , alignment = "good" , ), ] sources . Objects ( objs ) \ | tubes . JSONDumps () \ | tubes . Joined ( by = b "

" ) \ | tubes . Gzip () \ | sinks . File ( "output.gz" , "wb" )

Then in our old friend bash.

$ zcat output.gz { "alignment" : "evil" , "birthdate" : "08/03/1977" , "name" : "Bob Corsaro" } { "alignment" : "good" , "birthdate" : "08/03/1977" , "name" : "Tom Brady" } $

You can find more documentation on readthedocs

Catalog¶ Sources¶ Objects Takes a list of python objects. File Creates a stream from a file. Bytes Takes a byte string. IO Takes an object with a read function. Socket Takes an addr, port and socket() args. . HTTP Takes an method, url and any args that can be passed to requests library. Tubes¶ Gunzip Unzips a binary stream. Gzip Zips a binary stream. JSONLoads Parses a byte string stream of raw JSON objects. Will try to use ujson, then built-in json. JSONDumps Serializes an object stream using json.dumps . Will try to use ujson, then built-in json. Split Splits a stream that supports the split method. Joined Joins a stream of the same type as the by argument. Tee Takes a sink and passes chunks along apparatus. Map Takes a transformer function for single items in stream. Filter Takes a filter test callback and only forwards items that pass. ChunkMap Takes a transformer function for batch of stream items. Sinks¶ Objects A list that stores all passed items to self. Bytes Saves each chunk self.results. File Writes each chunk to a file. HTTPPost Writes data via HTTPPost. Hash Takes algorithm name, updates hash with contents. Debugger Writes each chunk to the tubing.tubes debugger with level DEBUG. Extensions¶ s3.S3Source Create stream from an S3 object. s3.MultipartUploader Stream data to S3 object. elasticsearch.BulkSink Stream elasticsearch.DocUpdate objects to the elasticsearch _bulk endpoint.

Sources¶ To make your own source, create a Reader class with the following interface. class MyReader ( object ): """ MyReader returns count instances of data. """ def __init__ ( self , data = "hello world

" , count = 10 ): self . data = data self . count = count def read ( self , amt ): """ read(amt) returns $amt of data and a boolean indicating EOF. """ if not amt : amt = self . count r = self . data * min ( amt , self . count ) self . count -= amt return r , self . count <= 0 The important thing to remember is that your read function should return an iterable of units of data, not a single piece of data. Then wrap your reader in the loving embrace of MakeSourceFactory. from tubing import sources MySource = sources . MakeSourceFactory ( MyReader ) Now it can be used in a apparatus! from __future__ import print_function from tubing import tubes sink = MySource ( data = "goodbye cruel world!" , count = 1 ) \ | tubes . Joined ( by = b "

" ) \ | sinks . Bytes () print ( sinks . result ) # Output: goodbye cruel world!