Print the non-Ascii column value, python- spark
Pretty new to python and spark, I have written a udf to remove the non-ascii character if it is present in the string.
What is the most effective way to make it print the erroraneous value along with doing the operation? ( Error values would be cells that contain non-ascii characters)
code:
import findspark
findspark.init()
import pyspark # only run after findspark.init()
from pyspark.sql import SparkSession
spark = SparkSession.builder.getOrCreate()
import pandas as pd
sc = spark.sparkContext
from pyspark.sql.window import Window
from pyspark.sql.functions import count, col
from pyspark.sql import Row
from pyspark.sql.functions import udf
def nonasciitoascii(unicodestring):
return unicodestring.encode("ascii","ignore")
df=spark.read.csv("abc.csv")
df.show()
df.printSchema()
convertedudf = udf(nonasciitoascii)
converted = df.select('_c1','_c2').withColumn('converted',convertedudf(df._c1))
converted.show()
python pyspark ascii
add a comment |
Pretty new to python and spark, I have written a udf to remove the non-ascii character if it is present in the string.
What is the most effective way to make it print the erroraneous value along with doing the operation? ( Error values would be cells that contain non-ascii characters)
code:
import findspark
findspark.init()
import pyspark # only run after findspark.init()
from pyspark.sql import SparkSession
spark = SparkSession.builder.getOrCreate()
import pandas as pd
sc = spark.sparkContext
from pyspark.sql.window import Window
from pyspark.sql.functions import count, col
from pyspark.sql import Row
from pyspark.sql.functions import udf
def nonasciitoascii(unicodestring):
return unicodestring.encode("ascii","ignore")
df=spark.read.csv("abc.csv")
df.show()
df.printSchema()
convertedudf = udf(nonasciitoascii)
converted = df.select('_c1','_c2').withColumn('converted',convertedudf(df._c1))
converted.show()
python pyspark ascii
What is the erroneous value here? Write an example of it, please.
– OmG
Nov 10 at 18:35
the error values are the cells that contain non-ascii @OmG
– Viv
Nov 11 at 5:43
add a comment |
Pretty new to python and spark, I have written a udf to remove the non-ascii character if it is present in the string.
What is the most effective way to make it print the erroraneous value along with doing the operation? ( Error values would be cells that contain non-ascii characters)
code:
import findspark
findspark.init()
import pyspark # only run after findspark.init()
from pyspark.sql import SparkSession
spark = SparkSession.builder.getOrCreate()
import pandas as pd
sc = spark.sparkContext
from pyspark.sql.window import Window
from pyspark.sql.functions import count, col
from pyspark.sql import Row
from pyspark.sql.functions import udf
def nonasciitoascii(unicodestring):
return unicodestring.encode("ascii","ignore")
df=spark.read.csv("abc.csv")
df.show()
df.printSchema()
convertedudf = udf(nonasciitoascii)
converted = df.select('_c1','_c2').withColumn('converted',convertedudf(df._c1))
converted.show()
python pyspark ascii
Pretty new to python and spark, I have written a udf to remove the non-ascii character if it is present in the string.
What is the most effective way to make it print the erroraneous value along with doing the operation? ( Error values would be cells that contain non-ascii characters)
code:
import findspark
findspark.init()
import pyspark # only run after findspark.init()
from pyspark.sql import SparkSession
spark = SparkSession.builder.getOrCreate()
import pandas as pd
sc = spark.sparkContext
from pyspark.sql.window import Window
from pyspark.sql.functions import count, col
from pyspark.sql import Row
from pyspark.sql.functions import udf
def nonasciitoascii(unicodestring):
return unicodestring.encode("ascii","ignore")
df=spark.read.csv("abc.csv")
df.show()
df.printSchema()
convertedudf = udf(nonasciitoascii)
converted = df.select('_c1','_c2').withColumn('converted',convertedudf(df._c1))
converted.show()
python pyspark ascii
python pyspark ascii
edited Nov 11 at 5:44
asked Nov 10 at 14:22
Viv
3951317
3951317
What is the erroneous value here? Write an example of it, please.
– OmG
Nov 10 at 18:35
the error values are the cells that contain non-ascii @OmG
– Viv
Nov 11 at 5:43
add a comment |
What is the erroneous value here? Write an example of it, please.
– OmG
Nov 10 at 18:35
the error values are the cells that contain non-ascii @OmG
– Viv
Nov 11 at 5:43
What is the erroneous value here? Write an example of it, please.
– OmG
Nov 10 at 18:35
What is the erroneous value here? Write an example of it, please.
– OmG
Nov 10 at 18:35
the error values are the cells that contain non-ascii @OmG
– Viv
Nov 11 at 5:43
the error values are the cells that contain non-ascii @OmG
– Viv
Nov 11 at 5:43
add a comment |
1 Answer
1
active
oldest
votes
A simple solution which works for most of the time is running the computation for the purpose:
# in python 3
def check_ascii(string):
if(not string.isascii()):
return string
else:
return None
def check_ascii_in_python_2(string):
if(not all(ord(char) < 128 for char in string)):
return string
else:
return None
all_strings_with_non_ascii_chars = df.select('_c1','_c2').withColumn('check', check_ascii(df._c1)).filter('check is not null').select('check')
all_strings_with_non_ascii_chars.show()
Thanks @OmG, but i get File "/opt/apps/spark-2.3.1-bin-hadoop2.7/bin/csvparser.py", line 28, in check_ascii if(not string.isascii()): AttributeError: 'unicode' object has no attribute 'isascii' at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:298) at org.apache.spark.sql.execution.python.PythonUDFRunner$$anon$1.read(PythonUDFRunner.scala:83)
– Viv
Nov 12 at 7:23
@Viv it's in python 3. For python_2 is updated.
– OmG
Nov 12 at 12:40
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
A simple solution which works for most of the time is running the computation for the purpose:
# in python 3
def check_ascii(string):
if(not string.isascii()):
return string
else:
return None
def check_ascii_in_python_2(string):
if(not all(ord(char) < 128 for char in string)):
return string
else:
return None
all_strings_with_non_ascii_chars = df.select('_c1','_c2').withColumn('check', check_ascii(df._c1)).filter('check is not null').select('check')
all_strings_with_non_ascii_chars.show()
Thanks @OmG, but i get File "/opt/apps/spark-2.3.1-bin-hadoop2.7/bin/csvparser.py", line 28, in check_ascii if(not string.isascii()): AttributeError: 'unicode' object has no attribute 'isascii' at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:298) at org.apache.spark.sql.execution.python.PythonUDFRunner$$anon$1.read(PythonUDFRunner.scala:83)
– Viv
Nov 12 at 7:23
@Viv it's in python 3. For python_2 is updated.
– OmG
Nov 12 at 12:40
add a comment |
A simple solution which works for most of the time is running the computation for the purpose:
# in python 3
def check_ascii(string):
if(not string.isascii()):
return string
else:
return None
def check_ascii_in_python_2(string):
if(not all(ord(char) < 128 for char in string)):
return string
else:
return None
all_strings_with_non_ascii_chars = df.select('_c1','_c2').withColumn('check', check_ascii(df._c1)).filter('check is not null').select('check')
all_strings_with_non_ascii_chars.show()
Thanks @OmG, but i get File "/opt/apps/spark-2.3.1-bin-hadoop2.7/bin/csvparser.py", line 28, in check_ascii if(not string.isascii()): AttributeError: 'unicode' object has no attribute 'isascii' at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:298) at org.apache.spark.sql.execution.python.PythonUDFRunner$$anon$1.read(PythonUDFRunner.scala:83)
– Viv
Nov 12 at 7:23
@Viv it's in python 3. For python_2 is updated.
– OmG
Nov 12 at 12:40
add a comment |
A simple solution which works for most of the time is running the computation for the purpose:
# in python 3
def check_ascii(string):
if(not string.isascii()):
return string
else:
return None
def check_ascii_in_python_2(string):
if(not all(ord(char) < 128 for char in string)):
return string
else:
return None
all_strings_with_non_ascii_chars = df.select('_c1','_c2').withColumn('check', check_ascii(df._c1)).filter('check is not null').select('check')
all_strings_with_non_ascii_chars.show()
A simple solution which works for most of the time is running the computation for the purpose:
# in python 3
def check_ascii(string):
if(not string.isascii()):
return string
else:
return None
def check_ascii_in_python_2(string):
if(not all(ord(char) < 128 for char in string)):
return string
else:
return None
all_strings_with_non_ascii_chars = df.select('_c1','_c2').withColumn('check', check_ascii(df._c1)).filter('check is not null').select('check')
all_strings_with_non_ascii_chars.show()
edited Nov 12 at 12:39
answered Nov 11 at 10:29
OmG
7,76352643
7,76352643
Thanks @OmG, but i get File "/opt/apps/spark-2.3.1-bin-hadoop2.7/bin/csvparser.py", line 28, in check_ascii if(not string.isascii()): AttributeError: 'unicode' object has no attribute 'isascii' at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:298) at org.apache.spark.sql.execution.python.PythonUDFRunner$$anon$1.read(PythonUDFRunner.scala:83)
– Viv
Nov 12 at 7:23
@Viv it's in python 3. For python_2 is updated.
– OmG
Nov 12 at 12:40
add a comment |
Thanks @OmG, but i get File "/opt/apps/spark-2.3.1-bin-hadoop2.7/bin/csvparser.py", line 28, in check_ascii if(not string.isascii()): AttributeError: 'unicode' object has no attribute 'isascii' at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:298) at org.apache.spark.sql.execution.python.PythonUDFRunner$$anon$1.read(PythonUDFRunner.scala:83)
– Viv
Nov 12 at 7:23
@Viv it's in python 3. For python_2 is updated.
– OmG
Nov 12 at 12:40
Thanks @OmG, but i get File "/opt/apps/spark-2.3.1-bin-hadoop2.7/bin/csvparser.py", line 28, in check_ascii if(not string.isascii()): AttributeError: 'unicode' object has no attribute 'isascii' at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:298) at org.apache.spark.sql.execution.python.PythonUDFRunner$$anon$1.read(PythonUDFRunner.scala:83)
– Viv
Nov 12 at 7:23
Thanks @OmG, but i get File "/opt/apps/spark-2.3.1-bin-hadoop2.7/bin/csvparser.py", line 28, in check_ascii if(not string.isascii()): AttributeError: 'unicode' object has no attribute 'isascii' at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:298) at org.apache.spark.sql.execution.python.PythonUDFRunner$$anon$1.read(PythonUDFRunner.scala:83)
– Viv
Nov 12 at 7:23
@Viv it's in python 3. For python_2 is updated.
– OmG
Nov 12 at 12:40
@Viv it's in python 3. For python_2 is updated.
– OmG
Nov 12 at 12:40
add a comment |
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What is the erroneous value here? Write an example of it, please.
– OmG
Nov 10 at 18:35
the error values are the cells that contain non-ascii @OmG
– Viv
Nov 11 at 5:43