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data-transport
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bug fix: sqlite and cursors and transport

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pull/6/head
Steve Nyemba 1 year ago
parent 3f7f3d7306
commit 2bb07aedec
3 changed files with 80 additions and 63 deletions
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28
bin/transport
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@ -46,6 +46,7 @@ import time
from multiprocessing import Process
import typer
import os
import transport
from transport import etl
from transport import providers
@ -88,7 +89,7 @@ def move (path,index=None):
_config = _config[ int(index)]
etl.instance(**_config)
else:
etl.instance(_config)
etl.instance(config=_config)
#
# if type(_config) == dict :
@ -109,19 +110,30 @@ def move (path,index=None):
# jobs.append(thread())
# if _config.index(_args) == 0 :
# thread.join()
wait(jobs)
# wait(jobs)
@app.command()
def version():
print (transport.version.__version__)
@app.command()
def generate (path:str):
__doc__="""
"""
_config = [{"source":{"provider":"http","url":"https://cdn.wsform.com/wp-content/uploads/2020/06/agreement.csv"},"target":{"provider":"file","path":"addresses.csv","delimiter":"csv"}}]
This function will generate a configuration template to give a sense of how to create one
"""
_config = [
{
"source":{"provider":"http","url":"https://raw.githubusercontent.com/codeforamerica/ohana-api/master/data/sample-csv/addresses.csv"},
"target":
[{"provider":"file","path":"addresses.csv","delimiter":"csv"},{"provider":"sqlite","database":"sample.db3","table":"addresses"}]
}
]
file = open(path,'w')
file.write(json.dumps(_config))
file.close()
# if __name__ == '__main__' :
@app.command()
def usage():
print (__doc__)
if __name__ == '__main__' :
app()
# #
# # Load information from the file ...
# if 'help' in SYS_ARGS :

87
transport/disk.py
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@ -62,34 +62,25 @@ class DiskWriter(Writer):
"""
THREAD_LOCK = Lock()
def __init__(self,**params):
Writer.__init__(self)
self.cache['meta'] = {'cols':0,'rows':0,'delimiter':None}
if 'path' in params:
self.path = params['path']
else:
self.path = 'data-transport.log'
self.delimiter = params['delimiter'] if 'delimiter' in params else None
# if 'name' in params:
# self.name = params['name'];
# else:
# self.name = 'data-transport.log'
# if os.path.exists(self.path) == False:
# os.mkdir(self.path)
def meta(self):
return self.cache['meta']
def isready(self):
"""
This function determines if the class is ready for execution or not
i.e it determines if the preconditions of met prior execution
"""
return True
# p = self.path is not None and os.path.exists(self.path)
# q = self.name is not None
# return p and q
def format (self,row):
self.cache['meta']['cols'] += len(row) if isinstance(row,list) else len(row.keys())
self.cache['meta']['rows'] += 1
return (self.delimiter.join(row) if self.delimiter else json.dumps(row))+"\n"
super().__init__()
self._path = params['path']
self._delimiter = params['delimiter']
# def meta(self):
# return self.cache['meta']
# def isready(self):
# """
# This function determines if the class is ready for execution or not
# i.e it determines if the preconditions of met prior execution
# """
# return True
# # p = self.path is not None and os.path.exists(self.path)
# # q = self.name is not None
# # return p and q
# def format (self,row):
# self.cache['meta']['cols'] += len(row) if isinstance(row,list) else len(row.keys())
# self.cache['meta']['rows'] += 1
# return (self.delimiter.join(row) if self.delimiter else json.dumps(row))+"\n"
def write(self,info,**_args):
"""
This function writes a record to a designated file
@ -97,21 +88,30 @@ class DiskWriter(Writer):
@param row row to be written
"""
try:
_mode = 'a' if 'overwrite' not in _args else 'w'
DiskWriter.THREAD_LOCK.acquire()
f = open(self.path,_mode)
if self.delimiter :
if type(info) == list :
for row in info :
f.write(self.format(row))
else:
f.write(self.format(info))
else:
if not type(info) == str :
f.write(json.dumps(info)+"\n")
else:
f.write(info)
f.close()
# # _path = _args['path'] if 'path' in _args else self.path
# # _delim= _args['delimiter'] if 'delimiter' in _args else self._delimiter
# # info.to_csv(_path,sep=_delim)
# info.to_csv(self.path)
# f = open(self.path,_mode)
# if self.delimiter :
# if type(info) == list :
# for row in info :
# f.write(self.format(row))
# else:
# f.write(self.format(info))
# else:
# if not type(info) == str :
# f.write(json.dumps(info)+"\n")
# else:
# f.write(info)
# f.close()
_delim = self._delimiter if 'delimiter' not in _args else _args['delimiter']
_path = self.path if 'path' not in _args else _args['path']
info.to_csv(_path,index=False,sep=_delim)
pass
except Exception as e:
#
# Not sure what should be done here ...
@ -220,16 +220,19 @@ class SQLiteWriter(SQLite,DiskWriter) :
#
# If the table doesn't exist we should create it
#
def write(self,info):
def write(self,info,**_args):
"""
"""
if not self.fields :
if type(info) == pd.DataFrame :
_columns = list(info.columns)
self.init(list(info.keys()))
if type(info) == dict :
info = [info]
elif type(info) == pd.DataFrame :
info = info.fillna('')
info = info.to_dict(orient='records')
SQLiteWriter.LOCK.acquire()

24
transport/etl.py
Unescape View File

@ -90,16 +90,18 @@ class Transporter(Process):
This function will write a data-frame to a designated data-store, The function is built around a delegation design pattern
:data data-frame or object to be written
"""
for _target in self._target :
if 'write' not in _target :
_target['context'] = 'write'
_target['lock'] = True
else:
_target['write']['lock'] = True
_writer = transport.factory.instance(**_target)
_writer.write(_data,**_args)
if hasattr(_writer,'close') :
_writer.close()
if _data.shape[0] > 0 :
for _target in self._target :
if 'write' not in _target :
_target['context'] = 'write'
# _target['lock'] = True
else:
# _target['write']['lock'] = True
pass
_writer = transport.factory.instance(**_target)
_writer.write(_data.copy(),**_args)
if hasattr(_writer,'close') :
_writer.close()
def write(self,_df,**_args):
"""
@ -114,7 +116,7 @@ class Transporter(Process):
for _indexes in _segments :
_fwd_args = {} if not _args else _args
self._delegate_write(_df.iloc[_indexes],**_fwd_args)
self._delegate_write(_df.iloc[_indexes])
#
# @TODO: Perhaps consider writing up each segment in a thread/process (speeds things up?)
pass

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