mirror of
https://github.com/gristlabs/grist-core.git
synced 2024-10-27 20:44:07 +00:00
Merge pull request #265 from yohanboniface/bye-messytable
Draft: remove dependency to messytables
This commit is contained in:
commit
b2b0950c9c
@ -1,11 +1,11 @@
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"""
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Plugin for importing CSV files
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"""
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import os
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import codecs
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import csv
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import logging
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import chardet
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import messytables
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import six
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from six.moves import zip
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@ -90,41 +90,50 @@ def parse_file(file_path, parse_options=None):
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"""
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parse_options = parse_options or {}
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with open(file_path, "rb") as f:
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with codecs.open(file_path, "rb") as f:
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sample = f.read(100000)
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encoding = chardet.detect(sample)['encoding'] or "utf8"
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# In addition, always prefer UTF8 over ASCII.
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if encoding == 'ascii':
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encoding = 'utf8'
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log.info("Using encoding %s", encoding)
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with codecs.open(file_path, mode="r", encoding=encoding) as f:
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parsing_options, export_list = _parse_open_file(f, parse_options=parse_options)
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return parsing_options, export_list
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def _guess_dialect(file_obj):
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try:
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# Restrict allowed delimiters to prevent guessing other char than this list.
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dialect = csv.Sniffer().sniff(file_obj.read(100000), delimiters=['\t', ',', ';', '|'])
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log.info("Guessed dialect %s", dict(dialect.__dict__))
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# Mimic messytables default for now.
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dialect.lineterminator = "\n"
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dialect.doublequote = True
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return dialect
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except csv.Error:
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log.info("Cannot guess dialect using Excel as fallback.")
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return csv.excel
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finally:
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file_obj.seek(0)
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def _parse_open_file(file_obj, parse_options=None):
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options = {}
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csv_keys = ['delimiter', 'quotechar', 'lineterminator', 'doublequote', 'skipinitialspace']
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csv_options = {k: parse_options.get(k) for k in csv_keys}
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if six.PY2:
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csv_options = {k: v.encode('utf8') if isinstance(v, six.text_type) else v
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for k, v in csv_options.items()}
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options = {}
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dialect = _guess_dialect(file_obj)
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table_set = messytables.CSVTableSet(file_obj,
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delimiter=csv_options['delimiter'],
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quotechar=csv_options['quotechar'],
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lineterminator=csv_options['lineterminator'],
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doublequote=csv_options['doublequote'],
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skipinitialspace=csv_options['skipinitialspace'])
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csv_options = {}
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for key in csv_keys:
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value = parse_options.get(key, getattr(dialect, key, None))
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if value is not None:
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csv_options[key] = value
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num_rows = parse_options.get('NUM_ROWS', 0)
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reader = csv.reader(file_obj, **csv_options)
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# Messytable's encoding detection uses too small a sample, so we override it here.
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sample = file_obj.read(100000)
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table_set.encoding = chardet.detect(sample)['encoding']
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# In addition, always prefer UTF8 over ASCII.
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if table_set.encoding == 'ascii':
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table_set.encoding = 'utf8'
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export_list = []
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# A table set is a collection of tables:
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for row_set in table_set.tables:
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table_name = None
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sample_rows = list(row_set.sample)
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# Messytables doesn't guess whether headers are present, so we need to step in.
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rows = list(reader)
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sample_len = 100
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sample_rows = rows[:sample_len]
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data_offset, headers = import_utils.headers_guess(sample_rows)
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# Make sure all header values are strings.
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@ -149,11 +158,8 @@ def _parse_open_file(file_obj, parse_options=None):
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data_offset -= 1
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headers = [''] * len(headers)
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row_set.register_processor(messytables.offset_processor(data_offset))
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rows = [
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[cell.value for cell in row]
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for row in row_set
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]
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rows = rows[data_offset:]
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num_rows = parse_options.get('NUM_ROWS', 0)
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table_data_with_types = parse_data.get_table_data(rows, len(headers), num_rows)
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# Identify and remove empty columns, and populate separate metadata and data lists.
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@ -168,10 +174,11 @@ def _parse_open_file(file_obj, parse_options=None):
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table_data.append(data)
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if not table_data:
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log.info("No data found. Aborting CSV import.")
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# Don't add tables with no columns.
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continue
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return {}, []
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guessed = row_set._dialect
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guessed = reader.dialect
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quoting = parse_options.get('quoting')
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options = {"delimiter": parse_options.get('delimiter', guessed.delimiter),
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"doublequote": parse_options.get('doublequote', guessed.doublequote),
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@ -184,14 +191,15 @@ def _parse_open_file(file_obj, parse_options=None):
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"SCHEMA": SCHEMA
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}
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log.info("Output table %r with %d columns", table_name, len(column_metadata))
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log.info("Output table with %d columns", len(column_metadata))
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for c in column_metadata:
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log.debug("Output column %s", c)
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export_list.append({
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"table_name": table_name,
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export_list = [{
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"table_name": None,
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"column_metadata": column_metadata,
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"table_data": table_data
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})
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}]
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return options, export_list
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@ -2,7 +2,7 @@
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import os
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import textwrap
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import unittest
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from six import BytesIO, text_type
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from six import StringIO, text_type
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import csv
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from imports import import_csv
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@ -12,12 +12,6 @@ def _get_fixture(filename):
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return os.path.join(os.path.dirname(__file__), "fixtures", filename)
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def bytes_io_from_str(string):
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if isinstance(string, text_type):
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string = string.encode("utf8")
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return BytesIO(string)
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class TestImportCSV(unittest.TestCase):
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maxDiff = None
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@ -107,7 +101,7 @@ class TestImportCSV(unittest.TestCase):
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u''])
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def test_wrong_cols1(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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name1, name2, name3
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a1,b1,c1
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@ -124,7 +118,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "name3", "Text", ["c1", "", ""])
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def test_wrong_cols2(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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name1
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a1,b1
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@ -140,7 +134,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "", "Text", ["", "c2"])
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def test_offset(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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,,,,,,,
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name1,name2,name3
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@ -160,7 +154,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 3, "", "Text", ["", "", "d4"])
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def test_offset_no_header(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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4,b1,c1
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4,b2,c2
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@ -176,7 +170,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "", "Text", ["c1", "c2", "c3"])
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def test_empty_headers(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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,,-,-
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b,a,a,a,a
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@ -194,7 +188,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 3, "-", "Text", ["a", "a", "a"])
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self._check_col(parsed_file, 4, "", "Text", ["a", "a", "a"])
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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-,-,-,-,-,-
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b,a,a,a,a
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@ -212,7 +206,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 5, "-", "Text", ["", "", ""])
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def test_guess_missing_user_option(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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name1,;name2,;name3
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a1,;b1,;c1
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@ -242,7 +236,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, ";name3", "Text", [";c1", ";c2", ";c3"])
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def test_one_line_file_no_header(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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2,name2,name3
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"""))
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@ -256,7 +250,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "", "Text", ["name3"])
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def test_one_line_file_with_header(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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name1,name2,name3
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"""))
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@ -270,7 +264,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "name3", "Text", [])
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def test_empty_file(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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"""))
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@ -278,7 +272,7 @@ class TestImportCSV(unittest.TestCase):
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self.assertEqual(parsed_file, ({}, []))
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def test_option_num_rows(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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name1,name2,name3
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a1,b1,c1
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@ -310,7 +304,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "name3", "Text", ['c1', 'c2', 'c3'])
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def test_option_num_rows_no_header(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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,,
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,,
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@ -336,7 +330,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "", "Text", ['c1', 'c2'])
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def test_option_use_col_name_as_header(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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name1,name2,name3
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a1,1,c1
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@ -361,7 +355,7 @@ class TestImportCSV(unittest.TestCase):
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self._check_col(parsed_file, 2, "name3", "Text", ["c1", "c2", "c3"])
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def test_option_use_col_name_as_header_no_headers(self):
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file_obj = bytes_io_from_str(textwrap.dedent(
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file_obj = StringIO(textwrap.dedent(
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"""\
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,,,
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,,,
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@ -14,6 +14,15 @@ if six.PY2:
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log = logging.getLogger(__name__)
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def empty(value):
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""" Stringify the value and check that it has a length. """
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if value is None:
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return True
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if not isinstance(value, six.string_types):
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value = six.text_type(value)
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return not value.strip()
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# Get path to an imported file.
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def get_path(file_source):
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importdir = os.environ.get('IMPORTDIR') or '/importdir'
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@ -39,7 +48,7 @@ def _is_header(header, data_rows):
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"""
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# See if the row has any non-text values.
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for cell in header:
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if not isinstance(cell.value, six.string_types) or _is_numeric(cell.value):
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if not isinstance(cell, six.string_types) or _is_numeric(cell):
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return False
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@ -48,7 +57,7 @@ def _is_header(header, data_rows):
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count_repeats = [0 for cell in header]
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for row in data_rows:
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for cell, header_cell in zip(row, header):
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if cell.value and cell.value == header_cell.value:
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if cell and cell == header_cell:
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return False
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return True
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@ -59,7 +68,7 @@ def _count_nonempty(row):
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"""
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count = 0
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for i, c in enumerate(row):
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if not c.empty:
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if not empty(c):
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count = i + 1
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return count
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@ -83,7 +92,7 @@ def expand_headers(headers, data_offset, rows):
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row_length = max(itertools.chain([len(headers)],
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(_count_nonempty(r) for r in itertools.islice(rows, data_offset,
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None))))
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header_values = [h.value.strip() for h in headers] + [u''] * (row_length - len(headers))
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header_values = [h.strip() for h in headers] + [u''] * (row_length - len(headers))
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return header_values
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@ -1,22 +0,0 @@
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import unittest
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import messytables
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import os
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class TestMessyTables(unittest.TestCase):
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# Just a skeleton test
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def test_any_tableset(self):
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path = os.path.join(os.path.dirname(__file__),
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"fixtures", "nyc_schools_progress_report_ec_2013.xlsx")
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with open(path, "rb") as f:
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table_set = messytables.any.any_tableset(f, extension=os.path.splitext(path)[1])
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self.assertIsInstance(table_set, messytables.XLSTableSet)
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self.assertEqual([t.name for t in table_set.tables],
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['Summary', 'Student Progress', 'Student Performance', 'School Environment',
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'Closing the Achievement Gap', 'Middle School Course Metrics',
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'All Information', 'Peer Groups'])
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if __name__ == "__main__":
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unittest.main()
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@ -9,6 +9,7 @@ tests under 'arc unit' and under Jenkins.
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./sandbox/nacl/bin/run python /grist/runtests.py [--xunit]
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"""
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import codecs
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import logging
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import os
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import sys
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import unittest
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@ -30,6 +31,9 @@ def main():
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utf8_stdout = codecs.getwriter('utf8')(utf8_stdout)
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test_runner = xmlrunner.XMLTestRunner(stream=utf8_stdout)
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if "-v" in argv or "--verbose" in argv:
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logging.basicConfig(level=logging.DEBUG)
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if all(arg.startswith("-") for arg in argv[1:]):
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argv.insert(1, "discover")
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