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- # -*- coding: utf-8 -*-
- # Copyright (C) 2001,2002 Python Software Foundation
- # csv package unit tests
- import array
- import decimal
- import os
- import string
- import sys
- import tempfile
- import unittest2 as unittest
- from codecs import EncodedFile
- from io import BytesIO
- import unicodecsv as csv
- try:
- # Python 2
- chr = unichr
- except:
- pass
- # pypy and cpython differ under which exception is raised under some
- # circumstances e.g. whether a module is written in C or not.
- py_compat_exc = (TypeError, AttributeError)
- class Test_Csv(unittest.TestCase):
- """
- Test the underlying C csv parser in ways that are not appropriate
- from the high level interface. Further tests of this nature are done
- in TestDialectRegistry.
- """
- def _test_arg_valid(self, ctor, arg):
- self.assertRaises(py_compat_exc, ctor)
- self.assertRaises(py_compat_exc, ctor, None)
- self.assertRaises(py_compat_exc, ctor, arg, bad_attr=0)
- self.assertRaises(py_compat_exc, ctor, arg, delimiter=0)
- self.assertRaises(py_compat_exc, ctor, arg, delimiter='XX')
- self.assertRaises(csv.Error, ctor, arg, 'foo')
- self.assertRaises(py_compat_exc, ctor, arg, delimiter=None)
- self.assertRaises(py_compat_exc, ctor, arg, delimiter=1)
- self.assertRaises(py_compat_exc, ctor, arg, quotechar=1)
- self.assertRaises(py_compat_exc, ctor, arg, lineterminator=None)
- self.assertRaises(py_compat_exc, ctor, arg, lineterminator=1)
- self.assertRaises(py_compat_exc, ctor, arg, quoting=None)
- self.assertRaises(py_compat_exc, ctor, arg,
- quoting=csv.QUOTE_ALL, quotechar='')
- self.assertRaises(py_compat_exc, ctor, arg,
- quoting=csv.QUOTE_ALL, quotechar=None)
- def test_reader_arg_valid(self):
- self._test_arg_valid(csv.reader, [])
- def test_writer_arg_valid(self):
- self._test_arg_valid(csv.writer, BytesIO())
- def _test_default_attrs(self, ctor, *args):
- obj = ctor(*args)
- # Check defaults
- self.assertEqual(obj.dialect.delimiter, ',')
- self.assertEqual(obj.dialect.doublequote, True)
- self.assertEqual(obj.dialect.escapechar, None)
- self.assertEqual(obj.dialect.lineterminator, "\r\n")
- self.assertEqual(obj.dialect.quotechar, '"')
- self.assertEqual(obj.dialect.quoting, csv.QUOTE_MINIMAL)
- self.assertEqual(obj.dialect.skipinitialspace, False)
- self.assertEqual(obj.dialect.strict, False)
- # Try deleting or changing attributes (they are read-only)
- self.assertRaises(py_compat_exc, delattr,
- obj.dialect, 'delimiter')
- self.assertRaises(py_compat_exc, setattr,
- obj.dialect, 'delimiter', ':')
- self.assertRaises(py_compat_exc, delattr,
- obj.dialect, 'quoting')
- self.assertRaises(py_compat_exc, setattr,
- obj.dialect, 'quoting', None)
- def test_reader_attrs(self):
- self._test_default_attrs(csv.reader, [])
- def test_writer_attrs(self):
- self._test_default_attrs(csv.writer, BytesIO())
- def _test_kw_attrs(self, ctor, *args):
- # Now try with alternate options
- kwargs = dict(delimiter=':', doublequote=False, escapechar='\\',
- lineterminator='\r', quotechar='*',
- quoting=csv.QUOTE_NONE, skipinitialspace=True,
- strict=True)
- obj = ctor(*args, **kwargs)
- self.assertEqual(obj.dialect.delimiter, ':')
- self.assertEqual(obj.dialect.doublequote, False)
- self.assertEqual(obj.dialect.escapechar, '\\')
- self.assertEqual(obj.dialect.lineterminator, "\r")
- self.assertEqual(obj.dialect.quotechar, '*')
- self.assertEqual(obj.dialect.quoting, csv.QUOTE_NONE)
- self.assertEqual(obj.dialect.skipinitialspace, True)
- self.assertEqual(obj.dialect.strict, True)
- def test_reader_kw_attrs(self):
- self._test_kw_attrs(csv.reader, [])
- def test_writer_kw_attrs(self):
- self._test_kw_attrs(csv.writer, BytesIO())
- def _test_dialect_attrs(self, ctor, *args):
- # Now try with dialect-derived options
- class dialect:
- delimiter = '-'
- doublequote = False
- escapechar = '^'
- lineterminator = '$'
- quotechar = '#'
- quoting = csv.QUOTE_ALL
- skipinitialspace = True
- strict = False
- args = args + (dialect,)
- obj = ctor(*args)
- self.assertEqual(obj.dialect.delimiter, '-')
- self.assertEqual(obj.dialect.doublequote, False)
- self.assertEqual(obj.dialect.escapechar, '^')
- self.assertEqual(obj.dialect.lineterminator, "$")
- self.assertEqual(obj.dialect.quotechar, '#')
- self.assertEqual(obj.dialect.quoting, csv.QUOTE_ALL)
- self.assertEqual(obj.dialect.skipinitialspace, True)
- self.assertEqual(obj.dialect.strict, False)
- def test_reader_dialect_attrs(self):
- self._test_dialect_attrs(csv.reader, [])
- def test_writer_dialect_attrs(self):
- self._test_dialect_attrs(csv.writer, BytesIO())
- def _write_test(self, fields, expect, **kwargs):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, **kwargs)
- writer.writerow(fields)
- fileobj.seek(0)
- self.assertEqual(fileobj.read(),
- expect + writer.dialect.lineterminator.encode('utf-8'))
- finally:
- fileobj.close()
- os.unlink(name)
- def test_write_arg_valid(self):
- import sys
- pypy3 = hasattr(sys, 'pypy_version_info') and sys.version_info.major == 3
- self.assertRaises(TypeError if pypy3 else csv.Error, self._write_test, None, '')
- self._write_test((), b'')
- self._write_test([None], b'""')
- self.assertRaises(csv.Error, self._write_test,
- [None], None, quoting=csv.QUOTE_NONE)
- # Check that exceptions are passed up the chain
- class BadList:
- def __len__(self):
- return 10
- def __getitem__(self, i):
- if i > 2:
- raise IOError
- self.assertRaises(IOError, self._write_test, BadList(), '')
- class BadItem:
- def __str__(self):
- raise IOError
- self.assertRaises(IOError, self._write_test, [BadItem()], '')
- def test_write_bigfield(self):
- # This exercises the buffer realloc functionality
- bigstring = 'X' * 50000
- self._write_test([bigstring, bigstring],
- b','.join([bigstring.encode('utf-8')] * 2))
- def test_write_quoting(self):
- self._write_test(['a', 1, 'p,q'], b'a,1,"p,q"')
- self.assertRaises(csv.Error,
- self._write_test,
- ['a', 1, 'p,q'], b'a,1,p,q',
- quoting=csv.QUOTE_NONE)
- self._write_test(['a', 1, 'p,q'], b'a,1,"p,q"',
- quoting=csv.QUOTE_MINIMAL)
- self._write_test(['a', 1, 'p,q'], b'"a",1,"p,q"',
- quoting=csv.QUOTE_NONNUMERIC)
- self._write_test(['a', 1, 'p,q'], b'"a","1","p,q"',
- quoting=csv.QUOTE_ALL)
- self._write_test(['a\nb', 1], b'"a\nb","1"',
- quoting=csv.QUOTE_ALL)
- def test_write_decimal(self):
- self._write_test(['a', decimal.Decimal("1.1"), 'p,q'], b'"a",1.1,"p,q"',
- quoting=csv.QUOTE_NONNUMERIC)
- def test_write_escape(self):
- self._write_test(['a', 1, 'p,q'], b'a,1,"p,q"',
- escapechar='\\')
- self.assertRaises(csv.Error,
- self._write_test,
- ['a', 1, 'p,"q"'], b'a,1,"p,\\"q\\""',
- escapechar=None, doublequote=False)
- self._write_test(['a', 1, 'p,"q"'], b'a,1,"p,\\"q\\""',
- escapechar='\\', doublequote=False)
- self._write_test(['"'], b'""""',
- escapechar='\\', quoting=csv.QUOTE_MINIMAL)
- self._write_test(['"'], b'\\"',
- escapechar='\\', quoting=csv.QUOTE_MINIMAL,
- doublequote=False)
- self._write_test(['"'], b'\\"',
- escapechar='\\', quoting=csv.QUOTE_NONE)
- self._write_test(['a', 1, 'p,q'], b'a,1,p\\,q',
- escapechar='\\', quoting=csv.QUOTE_NONE)
- def test_writerows(self):
- class BrokenFile:
- def write(self, buf):
- raise IOError
- writer = csv.writer(BrokenFile())
- self.assertRaises(IOError, writer.writerows, [['a']])
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj)
- self.assertRaises(TypeError, writer.writerows, None)
- writer.writerows([['a', 'b'], ['c', 'd']])
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), b"a,b\r\nc,d\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- def _read_test(self, input, expect, **kwargs):
- reader = csv.reader(input, **kwargs)
- result = list(reader)
- self.assertEqual(result, expect)
- def test_read_oddinputs(self):
- self._read_test([], [])
- self._read_test([b''], [[]])
- self.assertRaises(csv.Error, self._read_test,
- [b'"ab"c'], None, strict=1)
- # cannot handle null bytes for the moment
- self.assertRaises(csv.Error, self._read_test,
- [b'ab\0c'], None, strict=1)
- self._read_test([b'"ab"c'], [['abc']], doublequote=0)
- def test_read_eol(self):
- self._read_test([b'a,b'], [['a', 'b']])
- self._read_test([b'a,b\n'], [['a', 'b']])
- self._read_test([b'a,b\r\n'], [['a', 'b']])
- self._read_test([b'a,b\r'], [['a', 'b']])
- self.assertRaises(csv.Error, self._read_test, [b'a,b\rc,d'], [])
- self.assertRaises(csv.Error, self._read_test, [b'a,b\nc,d'], [])
- self.assertRaises(csv.Error, self._read_test, [b'a,b\r\nc,d'], [])
- def test_read_escape(self):
- self._read_test([b'a,\\b,c'], [['a', 'b', 'c']], escapechar='\\')
- self._read_test([b'a,b\\,c'], [['a', 'b,c']], escapechar='\\')
- self._read_test([b'a,"b\\,c"'], [['a', 'b,c']], escapechar='\\')
- self._read_test([b'a,"b,\\c"'], [['a', 'b,c']], escapechar='\\')
- self._read_test([b'a,"b,c\\""'], [['a', 'b,c"']], escapechar='\\')
- self._read_test([b'a,"b,c"\\'], [['a', 'b,c\\']], escapechar='\\')
- def test_read_quoting(self):
- self._read_test([b'1,",3,",5'], [['1', ',3,', '5']])
- self._read_test([b'1,",3,",5'], [['1', '"', '3', '"', '5']],
- quotechar=None, escapechar='\\')
- self._read_test([b'1,",3,",5'], [['1', '"', '3', '"', '5']],
- quoting=csv.QUOTE_NONE, escapechar='\\')
- # will this fail where locale uses comma for decimals?
- self._read_test([b',3,"5",7.3, 9'], [['', 3, '5', 7.3, 9]],
- quoting=csv.QUOTE_NONNUMERIC)
- self._read_test([b'"a\nb", 7'], [['a\nb', ' 7']])
- self.assertRaises(ValueError, self._read_test,
- [b'abc,3'], [[]],
- quoting=csv.QUOTE_NONNUMERIC)
- def test_read_linenum(self):
- for r in (csv.reader([b'line,1', b'line,2', b'line,3']),
- csv.DictReader([b'line,1', b'line,2', b'line,3'],
- fieldnames=['a', 'b', 'c'])):
- self.assertEqual(r.line_num, 0)
- next(r)
- self.assertEqual(r.line_num, 1)
- next(r)
- self.assertEqual(r.line_num, 2)
- next(r)
- self.assertEqual(r.line_num, 3)
- self.assertRaises(StopIteration, next, r)
- self.assertEqual(r.line_num, 3)
- def test_roundtrip_quoteed_newlines(self):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj)
- self.assertRaises(TypeError, writer.writerows, None)
- rows = [['a\nb', 'b'], ['c', 'x\r\nd']]
- writer.writerows(rows)
- fileobj.seek(0)
- for i, row in enumerate(csv.reader(fileobj)):
- self.assertEqual(row, rows[i])
- finally:
- fileobj.close()
- os.unlink(name)
- class TestDialectRegistry(unittest.TestCase):
- def test_registry_badargs(self):
- self.assertRaises(TypeError, csv.list_dialects, None)
- self.assertRaises(TypeError, csv.get_dialect)
- self.assertRaises(csv.Error, csv.get_dialect, None)
- self.assertRaises(csv.Error, csv.get_dialect, "nonesuch")
- self.assertRaises(TypeError, csv.unregister_dialect)
- self.assertRaises(csv.Error, csv.unregister_dialect, None)
- self.assertRaises(csv.Error, csv.unregister_dialect, "nonesuch")
- self.assertRaises(TypeError, csv.register_dialect, None)
- self.assertRaises(TypeError, csv.register_dialect, None, None)
- self.assertRaises(TypeError, csv.register_dialect, "nonesuch", 0, 0)
- self.assertRaises(TypeError, csv.register_dialect, "nonesuch",
- badargument=None)
- self.assertRaises(TypeError, csv.register_dialect, "nonesuch",
- quoting=None)
- self.assertRaises(TypeError, csv.register_dialect, [])
- def test_registry(self):
- class myexceltsv(csv.excel):
- delimiter = "\t"
- name = "myexceltsv"
- expected_dialects = csv.list_dialects() + [name]
- expected_dialects.sort()
- csv.register_dialect(name, myexceltsv)
- try:
- self.assertEqual(csv.get_dialect(name).delimiter, '\t')
- got_dialects = csv.list_dialects()
- got_dialects.sort()
- self.assertEqual(expected_dialects, got_dialects)
- finally:
- csv.unregister_dialect(name)
- def test_register_kwargs(self):
- name = 'fedcba'
- csv.register_dialect(name, delimiter=';')
- try:
- self.assertNotEqual(csv.get_dialect(name).delimiter, '\t')
- self.assertEqual(list(csv.reader([b'X;Y;Z'], name)), [[u'X', u'Y', u'Z']])
- finally:
- csv.unregister_dialect(name)
- def test_incomplete_dialect(self):
- class myexceltsv(csv.Dialect):
- delimiter = "\t"
- self.assertRaises(csv.Error, myexceltsv)
- def test_space_dialect(self):
- class space(csv.excel):
- delimiter = " "
- quoting = csv.QUOTE_NONE
- escapechar = "\\"
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(b"abc def\nc1ccccc1 benzene\n")
- fileobj.seek(0)
- rdr = csv.reader(fileobj, dialect=space())
- self.assertEqual(next(rdr), ["abc", "def"])
- self.assertEqual(next(rdr), ["c1ccccc1", "benzene"])
- finally:
- fileobj.close()
- os.unlink(name)
- def test_dialect_apply(self):
- class testA(csv.excel):
- delimiter = "\t"
- class testB(csv.excel):
- delimiter = ":"
- class testC(csv.excel):
- delimiter = "|"
- csv.register_dialect('testC', testC)
- try:
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj)
- writer.writerow([1, 2, 3])
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), b"1,2,3\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, testA)
- writer.writerow([1, 2, 3])
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), b"1\t2\t3\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect=testB())
- writer.writerow([1, 2, 3])
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), b"1:2:3\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect='testC')
- writer.writerow([1, 2, 3])
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), b"1|2|3\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect=testA, delimiter=';')
- writer.writerow([1, 2, 3])
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), b"1;2;3\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- finally:
- csv.unregister_dialect('testC')
- def test_bad_dialect(self):
- # Unknown parameter
- self.assertRaises(TypeError, csv.reader, [], bad_attr=0)
- # Bad values
- self.assertRaises(TypeError, csv.reader, [], delimiter=None)
- self.assertRaises(TypeError, csv.reader, [], quoting=-1)
- self.assertRaises(TypeError, csv.reader, [], quoting=100)
- class TestCsvBase(unittest.TestCase):
- def readerAssertEqual(self, input, expected_result):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(input)
- fileobj.seek(0)
- reader = csv.reader(fileobj, dialect=self.dialect)
- fields = list(reader)
- self.assertEqual(fields, expected_result)
- finally:
- fileobj.close()
- os.unlink(name)
- def writerAssertEqual(self, input, expected_result):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect=self.dialect)
- writer.writerows(input)
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), expected_result)
- finally:
- fileobj.close()
- os.unlink(name)
- class TestDialectExcel(TestCsvBase):
- dialect = 'excel'
- def test_single(self):
- self.readerAssertEqual(b'abc', [['abc']])
- def test_simple(self):
- self.readerAssertEqual(b'1,2,3,4,5', [['1', '2', '3', '4', '5']])
- def test_blankline(self):
- self.readerAssertEqual(b'', [])
- def test_empty_fields(self):
- self.readerAssertEqual(b',', [['', '']])
- def test_singlequoted(self):
- self.readerAssertEqual(b'""', [['']])
- def test_singlequoted_left_empty(self):
- self.readerAssertEqual(b'"",', [['', '']])
- def test_singlequoted_right_empty(self):
- self.readerAssertEqual(b',""', [['', '']])
- def test_single_quoted_quote(self):
- self.readerAssertEqual(b'""""', [['"']])
- def test_quoted_quotes(self):
- self.readerAssertEqual(b'""""""', [['""']])
- def test_inline_quote(self):
- self.readerAssertEqual(b'a""b', [['a""b']])
- def test_inline_quotes(self):
- self.readerAssertEqual(b'a"b"c', [['a"b"c']])
- def test_quotes_and_more(self):
- # Excel would never write a field containing '"a"b', but when
- # reading one, it will return 'ab'.
- self.readerAssertEqual(b'"a"b', [['ab']])
- def test_lone_quote(self):
- self.readerAssertEqual(b'a"b', [['a"b']])
- def test_quote_and_quote(self):
- # Excel would never write a field containing '"a" "b"', but when
- # reading one, it will return 'a "b"'.
- self.readerAssertEqual(b'"a" "b"', [['a "b"']])
- def test_space_and_quote(self):
- self.readerAssertEqual(b' "a"', [[' "a"']])
- def test_quoted(self):
- self.readerAssertEqual(b'1,2,3,"I think, therefore I am",5,6',
- [['1', '2', '3',
- 'I think, therefore I am',
- '5', '6']])
- def test_quoted_quote(self):
- value = b'1,2,3,"""I see,"" said the blind man","as he picked up his hammer and saw"'
- self.readerAssertEqual(value,
- [['1', '2', '3',
- '"I see," said the blind man',
- 'as he picked up his hammer and saw']])
- def test_quoted_nl(self):
- input = b'''\
- 1,2,3,"""I see,""
- said the blind man","as he picked up his
- hammer and saw"
- 9,8,7,6'''
- self.readerAssertEqual(input,
- [['1', '2', '3',
- '"I see,"\nsaid the blind man',
- 'as he picked up his\nhammer and saw'],
- ['9', '8', '7', '6']])
- def test_dubious_quote(self):
- self.readerAssertEqual(b'12,12,1",', [['12', '12', '1"', '']])
- def test_null(self):
- self.writerAssertEqual([], b'')
- def test_single_writer(self):
- self.writerAssertEqual([['abc']], b'abc\r\n')
- def test_simple_writer(self):
- self.writerAssertEqual([[1, 2, 'abc', 3, 4]],
- b'1,2,abc,3,4\r\n')
- def test_quotes(self):
- self.writerAssertEqual([[1, 2, 'a"bc"', 3, 4]],
- b'1,2,"a""bc""",3,4\r\n')
- def test_quote_fieldsep(self):
- self.writerAssertEqual([['abc,def']],
- b'"abc,def"\r\n')
- def test_newlines(self):
- self.writerAssertEqual([[1, 2, 'a\nbc', 3, 4]],
- b'1,2,"a\nbc",3,4\r\n')
- class EscapedExcel(csv.excel):
- quoting = csv.QUOTE_NONE
- escapechar = '\\'
- class TestEscapedExcel(TestCsvBase):
- dialect = EscapedExcel()
- def test_escape_fieldsep(self):
- self.writerAssertEqual([['abc,def']], b'abc\\,def\r\n')
- def test_read_escape_fieldsep(self):
- self.readerAssertEqual(b'abc\\,def\r\n', [['abc,def']])
- class QuotedEscapedExcel(csv.excel):
- quoting = csv.QUOTE_NONNUMERIC
- escapechar = '\\'
- class TestQuotedEscapedExcel(TestCsvBase):
- dialect = QuotedEscapedExcel()
- def test_write_escape_fieldsep(self):
- self.writerAssertEqual([['abc,def']], b'"abc,def"\r\n')
- def test_read_escape_fieldsep(self):
- self.readerAssertEqual(b'"abc\\,def"\r\n', [['abc,def']])
- class TestDictFields(unittest.TestCase):
- # "long" means the row is longer than the number of fieldnames
- # "short" means there are fewer elements in the row than fieldnames
- def test_write_simple_dict(self):
- fd, name = tempfile.mkstemp()
- fileobj = open(name, 'w+b')
- try:
- writer = csv.DictWriter(fileobj, fieldnames=["f1", "f2", "f3"])
- writer.writeheader()
- fileobj.seek(0)
- self.assertEqual(fileobj.readline(), b"f1,f2,f3\r\n")
- writer.writerow({"f1": 10, "f3": "abc"})
- fileobj.seek(0)
- fileobj.readline() # header
- self.assertEqual(fileobj.read(), b"10,,abc\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- def test_write_unicode_header_dict(self):
- fd, name = tempfile.mkstemp()
- fileobj = open(name, 'w+b')
- try:
- writer = csv.DictWriter(fileobj, fieldnames=[u"ñ", u"ö"])
- writer.writeheader()
- fileobj.seek(0)
- self.assertEqual(fileobj.readline().decode('utf-8'), u"ñ,ö\r\n")
- finally:
- fileobj.close()
- os.unlink(name)
- def test_write_no_fields(self):
- fileobj = BytesIO()
- self.assertRaises(TypeError, csv.DictWriter, fileobj)
- def test_read_dict_fields(self):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(b"1,2,abc\r\n")
- fileobj.seek(0)
- reader = csv.DictReader(fileobj,
- fieldnames=["f1", "f2", "f3"])
- self.assertEqual(next(reader),
- {"f1": '1', "f2": '2', "f3": 'abc'})
- finally:
- fileobj.close()
- os.unlink(name)
- def test_read_dict_no_fieldnames(self):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(b"f1,f2,f3\r\n1,2,abc\r\n")
- fileobj.seek(0)
- reader = csv.DictReader(fileobj)
- self.assertEqual(reader.fieldnames,
- ["f1", "f2", "f3"])
- self.assertEqual(next(reader),
- {"f1": '1', "f2": '2', "f3": 'abc'})
- finally:
- fileobj.close()
- os.unlink(name)
- # Two test cases to make sure existing ways of implicitly setting
- # fieldnames continue to work. Both arise from discussion in issue3436.
- def test_read_dict_fieldnames_from_file(self):
- fd, name = tempfile.mkstemp()
- f = os.fdopen(fd, "w+b")
- try:
- f.write(b"f1,f2,f3\r\n1,2,abc\r\n")
- f.seek(0)
- reader = csv.DictReader(f, fieldnames=next(csv.reader(f)))
- self.assertEqual(reader.fieldnames,
- ["f1", "f2", "f3"])
- self.assertEqual(next(reader),
- {"f1": '1', "f2": '2', "f3": 'abc'})
- finally:
- f.close()
- os.unlink(name)
- def test_read_dict_fieldnames_chain(self):
- import itertools
- fd, name = tempfile.mkstemp()
- f = os.fdopen(fd, "w+b")
- try:
- f.write(b"f1,f2,f3\r\n1,2,abc\r\n")
- f.seek(0)
- reader = csv.DictReader(f)
- first = next(reader)
- for row in itertools.chain([first], reader):
- self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"])
- self.assertEqual(row, {"f1": '1', "f2": '2', "f3": 'abc'})
- finally:
- f.close()
- os.unlink(name)
- def test_read_long(self):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(b"1,2,abc,4,5,6\r\n")
- fileobj.seek(0)
- reader = csv.DictReader(fileobj,
- fieldnames=["f1", "f2"])
- self.assertEqual(next(reader), {"f1": '1', "f2": '2',
- None: ["abc", "4", "5", "6"]})
- finally:
- fileobj.close()
- os.unlink(name)
- def test_read_long_with_rest(self):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(b"1,2,abc,4,5,6\r\n")
- fileobj.seek(0)
- reader = csv.DictReader(fileobj,
- fieldnames=["f1", "f2"], restkey="_rest")
- self.assertEqual(next(reader), {"f1": '1', "f2": '2',
- "_rest": ["abc", "4", "5", "6"]})
- finally:
- fileobj.close()
- os.unlink(name)
- def test_read_long_with_rest_no_fieldnames(self):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(b"f1,f2\r\n1,2,abc,4,5,6\r\n")
- fileobj.seek(0)
- reader = csv.DictReader(fileobj, restkey="_rest")
- self.assertEqual(reader.fieldnames, ["f1", "f2"])
- self.assertEqual(next(reader), {"f1": '1', "f2": '2',
- "_rest": ["abc", "4", "5", "6"]})
- finally:
- fileobj.close()
- os.unlink(name)
- def test_read_short(self):
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- fileobj.write(b"1,2,abc,4,5,6\r\n1,2,abc\r\n")
- fileobj.seek(0)
- reader = csv.DictReader(fileobj,
- fieldnames="1 2 3 4 5 6".split(),
- restval="DEFAULT")
- self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
- "4": '4', "5": '5', "6": '6'})
- self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
- "4": 'DEFAULT', "5": 'DEFAULT',
- "6": 'DEFAULT'})
- finally:
- fileobj.close()
- os.unlink(name)
- def test_read_multi(self):
- sample = [
- b'2147483648,43.0e12,17,abc,def\r\n',
- b'147483648,43.0e2,17,abc,def\r\n',
- b'47483648,43.0,170,abc,def\r\n'
- ]
- reader = csv.DictReader(sample,
- fieldnames="i1 float i2 s1 s2".split())
- self.assertEqual(next(reader), {"i1": '2147483648',
- "float": '43.0e12',
- "i2": '17',
- "s1": 'abc',
- "s2": 'def'})
- def test_read_with_blanks(self):
- reader = csv.DictReader([b"1,2,abc,4,5,6\r\n", b"\r\n",
- b"1,2,abc,4,5,6\r\n"],
- fieldnames="1 2 3 4 5 6".split())
- self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
- "4": '4', "5": '5', "6": '6'})
- self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
- "4": '4', "5": '5', "6": '6'})
- def test_read_semi_sep(self):
- reader = csv.DictReader([b"1;2;abc;4;5;6\r\n"],
- fieldnames="1 2 3 4 5 6".split(),
- delimiter=';')
- self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
- "4": '4', "5": '5', "6": '6'})
- def test_empty_file(self):
- csv.DictReader(BytesIO())
- class TestArrayWrites(unittest.TestCase):
- def test_int_write(self):
- contents = [(20-i) for i in range(20)]
- a = array.array('i', contents)
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect="excel")
- writer.writerow(a)
- expected = b",".join([str(i).encode('utf-8') for i in a])+b"\r\n"
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), expected)
- finally:
- fileobj.close()
- os.unlink(name)
- def test_double_write(self):
- contents = [(20-i)*0.1 for i in range(20)]
- a = array.array('d', contents)
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect="excel")
- writer.writerow(a)
- float_repr = str
- if sys.version_info >= (2, 7, 3):
- float_repr = repr
- expected = b",".join([float_repr(i).encode('utf-8') for i in a])+b"\r\n"
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), expected)
- finally:
- fileobj.close()
- os.unlink(name)
- def test_float_write(self):
- contents = [(20-i)*0.1 for i in range(20)]
- a = array.array('f', contents)
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect="excel")
- writer.writerow(a)
- float_repr = str
- if sys.version_info >= (2, 7, 3):
- float_repr = repr
- expected = b",".join([float_repr(i).encode('utf-8') for i in a])+b"\r\n"
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), expected)
- finally:
- fileobj.close()
- os.unlink(name)
- def test_char_write(self):
- a = string.ascii_letters
- fd, name = tempfile.mkstemp()
- fileobj = os.fdopen(fd, "w+b")
- try:
- writer = csv.writer(fileobj, dialect="excel")
- writer.writerow(a)
- expected = ",".join(a).encode('utf-8')+b"\r\n"
- fileobj.seek(0)
- self.assertEqual(fileobj.read(), expected)
- finally:
- fileobj.close()
- os.unlink(name)
- class TestUnicode(unittest.TestCase):
- def test_unicode_read(self):
- f = EncodedFile(BytesIO((u"Martin von Löwis,"
- u"Marc André Lemburg,"
- u"Guido van Rossum,"
- u"François Pinard\r\n").encode('iso-8859-1')),
- data_encoding='iso-8859-1')
- reader = csv.reader(f, encoding='iso-8859-1')
- self.assertEqual(list(reader), [[u"Martin von Löwis",
- u"Marc André Lemburg",
- u"Guido van Rossum",
- u"François Pinard"]])
- class TestUnicodeErrors(unittest.TestCase):
- def test_encode_error(self):
- fd = BytesIO()
- writer = csv.writer(fd, encoding='cp1252', errors='xmlcharrefreplace')
- writer.writerow(['hello', chr(2603)])
- self.assertEqual(fd.getvalue(), b'hello,ਫ\r\n')
- def test_encode_error_dictwriter(self):
- fd = BytesIO()
- dw = csv.DictWriter(fd, ['col1'],
- encoding='cp1252', errors='xmlcharrefreplace')
- dw.writerow({'col1': chr(2604)})
- self.assertEqual(fd.getvalue(), b'ਬ\r\n')
- def test_decode_error(self):
- """Make sure the specified error-handling mode is obeyed on readers."""
- file = EncodedFile(BytesIO(u'Löwis,2,3'.encode('iso-8859-1')),
- data_encoding='iso-8859-1')
- reader = csv.reader(file, encoding='ascii', errors='ignore')
- self.assertEqual(list(reader)[0][0], 'Lwis')
- def test_decode_error_dictreader(self):
- """Make sure the error-handling mode is obeyed on DictReaders."""
- file = EncodedFile(BytesIO(u'name,height,weight\nLöwis,2,3'.encode('iso-8859-1')),
- data_encoding='iso-8859-1')
- reader = csv.DictReader(file, encoding='ascii', errors='ignore')
- self.assertEqual(list(reader)[0]['name'], 'Lwis')
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