如何使用python在mapreduce中获得直方图(Graph)的结果？

# 导入必要的库
from mrjob.job import MRJob

class Histogram(MRJob):
    
    def mapper(self, _, line):
        # 将输入数据按照一定规则切分和映射
        data = line.strip().split(',')
        value = float(data[0])
        
        # 将输入数据映射到相应的区间
        if value >= 0 and value < 10:
            yield '0-9', 1
        elif value >= 10 and value < 20:
            yield '10-19', 1
        elif value >= 20 and value < 30:
            yield '20-29', 1
        # ...
        # 根据实际需求添加更多的区间
        
    def reducer(self, key, values):
        # 对相同键的值进行聚合和处理
        yield key, sum(values)
        
if __name__ == '__main__':
    Histogram.run()