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author | Takeshi YAMAMURO <linguin.m.s@gmail.com> | 2016-06-05 23:35:04 -0700 |
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committer | Reynold Xin <rxin@databricks.com> | 2016-06-05 23:35:04 -0700 |
commit | b7e8d1cb3ce932ba4a784be59744af8a8ef027ce (patch) | |
tree | d0c996546e71b0fa5d46cb9ba32d4acc99eff971 /python/pyspark/sql/readwriter.py | |
parent | 79268aa461abd237bc4f96a7d31457c98e11798c (diff) | |
download | spark-b7e8d1cb3ce932ba4a784be59744af8a8ef027ce.tar.gz spark-b7e8d1cb3ce932ba4a784be59744af8a8ef027ce.tar.bz2 spark-b7e8d1cb3ce932ba4a784be59744af8a8ef027ce.zip |
[SPARK-15585][SQL] Fix NULL handling along with a spark-csv behaivour
## What changes were proposed in this pull request?
This pr fixes the behaviour of `format("csv").option("quote", null)` along with one of spark-csv.
Also, it explicitly sets default values for CSV options in python.
## How was this patch tested?
Added tests in CSVSuite.
Author: Takeshi YAMAMURO <linguin.m.s@gmail.com>
Closes #13372 from maropu/SPARK-15585.
Diffstat (limited to 'python/pyspark/sql/readwriter.py')
-rw-r--r-- | python/pyspark/sql/readwriter.py | 81 |
1 files changed, 39 insertions, 42 deletions
diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py index 9208a527d2..19aa8ddd06 100644 --- a/python/pyspark/sql/readwriter.py +++ b/python/pyspark/sql/readwriter.py @@ -303,10 +303,11 @@ class DataFrameReader(object): return self._df(self._jreader.text(self._spark._sc._jvm.PythonUtils.toSeq(path))) @since(2.0) - def csv(self, path, schema=None, sep=None, encoding=None, quote=None, escape=None, - comment=None, header=None, ignoreLeadingWhiteSpace=None, ignoreTrailingWhiteSpace=None, - nullValue=None, nanValue=None, positiveInf=None, negativeInf=None, dateFormat=None, - maxColumns=None, maxCharsPerColumn=None, mode=None): + def csv(self, path, schema=None, sep=u',', encoding=u'UTF-8', quote=u'\"', escape=u'\\', + comment=None, header='false', ignoreLeadingWhiteSpace='false', + ignoreTrailingWhiteSpace='false', nullValue='', nanValue='NaN', positiveInf='Inf', + negativeInf='Inf', dateFormat=None, maxColumns='20480', maxCharsPerColumn='1000000', + mode='PERMISSIVE'): """Loads a CSV file and returns the result as a [[DataFrame]]. This function goes through the input once to determine the input schema. To avoid going @@ -315,44 +316,41 @@ class DataFrameReader(object): :param path: string, or list of strings, for input path(s). :param schema: an optional :class:`StructType` for the input schema. :param sep: sets the single character as a separator for each field and value. - If None is set, it uses the default value, ``,``. - :param encoding: decodes the CSV files by the given encoding type. If None is set, - it uses the default value, ``UTF-8``. + The default value is ``,``. + :param encoding: decodes the CSV files by the given encoding type. + The default value is ``UTF-8``. :param quote: sets the single character used for escaping quoted values where the - separator can be part of the value. If None is set, it uses the default - value, ``"``. + separator can be part of the value. The default value is ``"``. :param escape: sets the single character used for escaping quotes inside an already - quoted value. If None is set, it uses the default value, ``\``. + quoted value. The default value is ``\``. :param comment: sets the single character used for skipping lines beginning with this character. By default (None), it is disabled. - :param header: uses the first line as names of columns. If None is set, it uses the - default value, ``false``. + :param header: uses the first line as names of columns. The default value is ``false``. :param ignoreLeadingWhiteSpace: defines whether or not leading whitespaces from values - being read should be skipped. If None is set, it uses - the default value, ``false``. + being read should be skipped. The default value is + ``false``. :param ignoreTrailingWhiteSpace: defines whether or not trailing whitespaces from values - being read should be skipped. If None is set, it uses - the default value, ``false``. - :param nullValue: sets the string representation of a null value. If None is set, it uses - the default value, empty string. - :param nanValue: sets the string representation of a non-number value. If None is set, it - uses the default value, ``NaN``. - :param positiveInf: sets the string representation of a positive infinity value. If None - is set, it uses the default value, ``Inf``. - :param negativeInf: sets the string representation of a negative infinity value. If None - is set, it uses the default value, ``Inf``. + being read should be skipped. The default value is + ``false``. + :param nullValue: sets the string representation of a null value. The default value is a + empty string. + :param nanValue: sets the string representation of a non-number value. The default value is + ``NaN``. + :param positiveInf: sets the string representation of a positive infinity value. The default + value is ``Inf``. + :param negativeInf: sets the string representation of a negative infinity value. The default + value is ``Inf``. :param dateFormat: sets the string that indicates a date format. Custom date formats follow the formats at ``java.text.SimpleDateFormat``. This applies to both date type and timestamp type. By default, it is None which means trying to parse times and date by ``java.sql.Timestamp.valueOf()`` and ``java.sql.Date.valueOf()``. - :param maxColumns: defines a hard limit of how many columns a record can have. If None is - set, it uses the default value, ``20480``. + :param maxColumns: defines a hard limit of how many columns a record can have. The default + value is ``20480``. :param maxCharsPerColumn: defines the maximum number of characters allowed for any given - value being read. If None is set, it uses the default value, - ``1000000``. - :param mode: allows a mode for dealing with corrupt records during parsing. If None is - set, it uses the default value, ``PERMISSIVE``. + value being read. The default value is ``1000000``. + :param mode: allows a mode for dealing with corrupt records during parsing. The default + value is ``PERMISSIVE``. * ``PERMISSIVE`` : sets other fields to ``null`` when it meets a corrupted record. When a schema is set by user, it sets ``null`` for extra fields. @@ -785,8 +783,8 @@ class DataFrameWriter(object): self._jwrite.text(path) @since(2.0) - def csv(self, path, mode=None, compression=None, sep=None, quote=None, escape=None, - header=None, nullValue=None, escapeQuotes=None): + def csv(self, path, mode='error', compression=None, sep=',', quote=u'\"', escape='\\', + header='false', nullValue='', escapeQuotes='true'): """Saves the content of the [[DataFrame]] in CSV format at the specified path. :param path: the path in any Hadoop supported file system @@ -800,20 +798,19 @@ class DataFrameWriter(object): :param compression: compression codec to use when saving to file. This can be one of the known case-insensitive shorten names (none, bzip2, gzip, lz4, snappy and deflate). - :param sep: sets the single character as a separator for each field and value. If None is - set, it uses the default value, ``,``. + :param sep: sets the single character as a separator for each field and value. The default + value is ``,``. :param quote: sets the single character used for escaping quoted values where the - separator can be part of the value. If None is set, it uses the default - value, ``"``. + separator can be part of the value. The default value is ``"``. :param escape: sets the single character used for escaping quotes inside an already - quoted value. If None is set, it uses the default value, ``\`` + quoted value. The default value is ``\`` :param escapeQuotes: A flag indicating whether values containing quotes should always be enclosed in quotes. If None is set, it uses the default value ``true``, escaping all values containing a quote character. - :param header: writes the names of columns as the first line. If None is set, it uses - the default value, ``false``. - :param nullValue: sets the string representation of a null value. If None is set, it uses - the default value, empty string. + :param header: writes the names of columns as the first line. The default value is + ``false``. + :param nullValue: sets the string representation of a null value. The default value is a + empty string. >>> df.write.csv(os.path.join(tempfile.mkdtemp(), 'data')) """ @@ -831,7 +828,7 @@ class DataFrameWriter(object): if nullValue is not None: self.option("nullValue", nullValue) if escapeQuotes is not None: - self.option("escapeQuotes", nullValue) + self.option("escapeQuotes", escapeQuotes) self._jwrite.csv(path) @since(1.5) |