Print the non-Ascii column value, python- spark












-1














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()









share|improve this question
























  • 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
















-1














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()









share|improve this question
























  • 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














-1












-1








-1







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()









share|improve this question















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






share|improve this question















share|improve this question













share|improve this question




share|improve this question








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


















  • 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












1 Answer
1






active

oldest

votes


















-1














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()





share|improve this answer























  • 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











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









-1














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()





share|improve this answer























  • 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
















-1














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()





share|improve this answer























  • 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














-1












-1








-1






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()





share|improve this answer














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()






share|improve this answer














share|improve this answer



share|improve this answer








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


















  • 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


















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