Question

我正在尝试将关系传递给Pig中的Python UDF。但它给我一个错误。以下是我的Pig Latin Script，Python Script和错误日志，

REGISTER '/home/cloudera/jython-installer-2.7.0.jar';
REGISTER '/home/cloudera/Code.py' USING jython as myfunc;
A = LOAD '/home/cloudera/Link.txt' as (line:chararray);
B = FOREACH A GENERATE myfunc.codefunc(line);

// Python脚本

import pandas as pd
def count(A,  crime):
    with open(A, 'r', encoding='UTF8') as fileA:
        data = fileA.read().lower()
        count = data.count(crime.lower())
        return count
def codefunc(A):
    crime = ['Rape', 'Murder', 'Extortion', 'Felony', 'Burglary', 'Property Damage', 'Arrest', 'Political Unrest', 'Civil Unrest', 'Solitication', 'Larceny', 'Abettor', 'Trafficking', 'Tresspasser', 'Robbery']
    crimecount = {}
    for i in range(len(crime)):
            crimecount[crime[i]] = count(A, crime[i])
    final_count = pd.DataFrame(list(crimecount.items()), columns = ['Crime', 'Value'])
    final_count['Percentage'] = 0
    total_count = final_count['Values'].sum()
    for i in range(0, final_count.last_valid_index()+1):
            final_count['Percentage'][i] = float((final_count['Values'][i]/total_count)*100.0)
    final_count.sort_values(by=['Percentage'], ascending=False)
    final_count.to_csv('/home/cloudera/solution.csv', header=0)

//错误日志 Link of Error Log

我已经放置了数据集所在的链接，并且我已经将Pig的链接传递给了Python。 Python应该转到该链接并读取数据集并执行编写的代码。 Python代码绝对没问题。我对此充满信心。但猪在关系中给我一个错误，＆＃39; B＆＃39;。我尝试在这里放置错误代码，但Stack Overflow不允许我这样做，所以我放置了链接。遗憾给您带来不便。谁能帮帮我吗。提前谢谢。

Answer 1

你的代码绝对没问题。问题出在Jython上。 Jython不支持Pandas数据帧，因为它是用C / C ++编写的。所以振作起来！

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在Pig中将关系传递给Python UDF时出错

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