Command line wrapper

README.md

@@ -8,9 +8,52 @@ the
 
 For additional background see the [Translator Knowledge Graph Drive](http://bit.ly/tr-kg)
 
-## Command Line Usage
+## Installation
+```
+pip install -r requirements.txt
+python setup.py install
+```
 
-Coming soon. For now see the [tests](tests/) for example
+## Command Line Usage
+Use the `--help` flag to get help. Right now there is a single command:
+```
+Usage: kgx dump [OPTIONS] [INPUT]... OUTPUT
+
+  Transforms a knowledge graph from one representation to another
+  INPUT  : any number of files or endpoints
+  OUTPUT : the output file
+
+Options:
+  --input-type TEXT   Extention type of input files: ttl, json, csv, rq, tsv,
+                      graphml
+  --output-type TEXT  Extention type of output files: ttl, json, csv, rq, tsv,
+                      graphml
+  --help              Show this message and exit.
+```
+
+CSV/TSV representation require two files, one that represents the vertex set and
+one for the edge set. JSON, TTL, and GRAPHML files represent a whole graph in a
+single file. For this reason when creating CSV/TSV representation we will zip
+the resulting files in a .tar file.
+
+The format will be inferred from the file extention. But if  this cannot be done
+then the `--input-type` and `--output-type` flags are useful to tell the program
+what formats to use. Currently not all conversions are supported.
+
+Here are some examples that mirror the [tests](tests/):
+
+```
+$ kgx dump --output-type=csv tests/resources/x1n.csv tests/resources/x1e.csv target/x1out
+File created at: target/x1out.tar
+$ kgx dump tests/resources/x1n.csv tests/resources/x1e.csv target/x1n.graphml
+File created at: target/x1n.graphml
+$ kgx dump tests/resources/monarch/biogrid_test.ttl target/bgcopy.csv
+File created at: target/bgcopy.csv.tar
+$ kgx dump tests/resources/monarch/biogrid_test.ttl target/x1n.graphml
+File created at: target/x1n.graphml
+$ kgx dump tests/resources/monarch/biogrid_test.ttl target/x1n.json
+File created at: target/x1n.json
+```
 
 ## Internal Representation
 
@@ -23,8 +66,8 @@ standard](http://bit.ly/tr-kg-standard), briefly summarized here:
     * id : required
     * name : string
     * category : string. broad high level type. Corresponds to label in neo4j
-    * extensible other properties, depending on 
- * [Edges](https://biolink.github.io/biolink-model/docs/Association.html) 
+    * extensible other properties, depending on
+ * [Edges](https://biolink.github.io/biolink-model/docs/Association.html)
     * subject : required
     * predicate : required
     * object : required
@@ -53,4 +96,3 @@ Intended to support
 Neo4j implements property graphs out the box. However, some
 implementations use reification nodes. The transform should allow for
 de-reification.
-

kgx/__init__.py

@@ -7,3 +7,5 @@
 from .sparql_transformer import SparqlTransformer
 from .rdf_transformer import ObanRdfTransformer
 from .json_transformer import JsonTransformer
+
+from .kgx import cli

kgx/kgx.py

@@ -0,0 +1,104 @@
+import kgx
+import click
+import os
+
+_transformers = {
+    'csv' : kgx.PandasTransformer,
+    'tsv' : kgx.PandasTransformer,
+    'graphml' : kgx.GraphMLTransformer,
+    'ttl' : kgx.ObanRdfTransformer,
+    'json' : kgx.JsonTransformer,
+    'rq' : kgx.SparqlTransformer
+}
+
+_file_types = ', '.join(_transformers.keys())
+
+class Config(object):
+    def __init__(self):
+        self.debug = False
+
+pass_config = click.make_pass_decorator(Config, ensure=True)
+
+@click.group()
+@click.option('--debug', is_flag=True, help='Prints the stack trace if error occurs')
+@click.version_option(version=kgx.__version__, prog_name=kgx.__name__)
+@pass_config
+def cli(config, debug):
+    """
+    Knowledge Graph Exchange
+    """
+    config.debug = debug
+
+@cli.command()
+@click.option('--input-type', type=str, help='Extention type of input files: ' + _file_types)
+@click.option('--output-type', type=str, help='Extention type of output files: ' + _file_types)
+@click.argument('input', nargs=-1, type=click.Path(exists=False))
+@click.argument('output', type=click.Path(exists=False))
+@pass_config
+def dump(config, input, output, input_type, output_type):
+    """\b
+    Transforms a knowledge graph from one representation to another
+    INPUT  : any number of files or endpoints
+    OUTPUT : the output file
+    """
+    try:
+        _dump(input, output, input_type, output_type)
+    except Exception as e:
+        if config.debug:
+            raise e
+        else:
+            raise click.ClickException(e)
+
+def _dump(input, output, input_type, output_type):
+    if output_type is None:
+        output_type = _get_type(output)
+
+    if input_type is None:
+        input_types = [_get_type(i) for i in input]
+        for t in input_types:
+            if input_types[0] != t:
+                raise Exception("""Each input file must have the same file type.
+                    Try setting the --input-type parameter to enforce a single
+                    type."""
+                )
+            input_type = input_types[0]
+
+    input_transformer = _transformers.get(input_type)
+
+    if input_transformer is None:
+        raise Exception('Input does not have a recognized type: ' + _file_types)
+
+    t = input_transformer()
+
+    for i in input:
+        t.parse(i)
+
+    t.report()
+
+    output_transformer = _transformers.get(output_type)
+
+    if output_transformer is None:
+        raise Exception('Output does not have a recognized type: ' + _file_types)
+
+    kwargs = {
+        'tmp_dir' : click.get_app_dir(kgx.__name__),
+        'extention' : output_type
+    }
+
+    w = output_transformer(t)
+    result_path = w.save(output, **kwargs)
+
+    if result_path is not None and os.path.isfile(result_path):
+        click.echo("File created at: " + result_path)
+    elif os.path.isfile(output):
+        click.echo("File created at: " + output)
+    else:
+        click.echo("Could not create file.")
+
+
+def _get_type(filename):
+    for t in _transformers.keys():
+        if filename.endswith('.' + t):
+            return t
+    else:
+        return None

kgx/nx_transformer.py

@@ -13,5 +13,5 @@ class GraphMLTransformer(NetworkxTransformer):
     I/O for graphml
     """
 
-    def save(self, path):
+    def save(self, path, **kwargs):
         nx.write_graphml(self.graph, path)

kgx/pandas_transformer.py

@@ -1,5 +1,8 @@
 import pandas as pd
 import logging
+import os
+import tarfile
+
 from .transformer import Transformer
 
 from typing import Dict, List
@@ -72,8 +75,39 @@ def order_cols(self, cols: List[str]):
                 cols.remove(c)
         return cols2 + cols
 
+    def save(self, filename: str, tmp_dir='.', extention='csv', ziptype='tar', zipmode='w', **kwargs):
+        """
+        Write two CSV/TSV files representing the node set and edge set of a
+        graph, and zip them in a .tar file. The two files will be written to a
+        temporary directory if provided in the kwargs, but they will not be
+        deleted after use. Each use of this method will overwrite the two files.
+        """
+
+        if not os.path.exists(tmp_dir):
+            os.mkdir(tmp_dir)
+
+        edge_file_name = 'edges.' + extention
+        node_file_name = 'nodes.' + extention
+
+        edge_file_path = os.path.join(tmp_dir, edge_file_name)
+        node_file_path = os.path.join(tmp_dir, node_file_name)
+
+        self.export_nodes().to_csv(node_file_path, index=False)
+        self.export_edges().to_csv(edge_file_path, index=False)
+
+        if not ziptype.startswith('.'):
+            ziptype = '.' + ziptype
+
+        if not filename.endswith(ziptype):
+            filename += ziptype
+
+        with tarfile.open(name=filename, mode=zipmode) as tar:
+            tar.add(name=node_file_path, arcname=node_file_name)
+            tar.add(name=edge_file_path, arcname=edge_file_name)
+
+        return filename
 
-    def save(self, filename: str, type='n', **args):
+    def save_csv(self, filename: str, type='n', **args):
         """
         Write a CSV/TSV
 

requirements.txt

@@ -2,9 +2,10 @@ prefixcommons>=0.1.4
 pip>=9.0.1
 networkx==1.11
 SPARQLWrapper==1.8.0
-pandas>=0.0
+pandas<0.21
 pytest>=0.0
 mypy>=0.0
 pystache>=0.0
 pytest_logging>=0.0
 rdflib>=0.0
+click==6.7

setup.py

@@ -0,0 +1,12 @@
+from setuptools import setup
+
+setup(
+    name='Knowledge Graph Exchange',
+    version='0.0.1',
+    packages=['kgx'],
+    install_requires=['Click'],
+    entry_points="""
+        [console_scripts]
+        kgx=kgx:cli
+    """
+)