如何使用 Python 中的日志记录打印列表项 + 整数/字符串 [英] How to print list item + integer/string using logging in Python

问题描述

我想打印带有项目索引的列表项目，例如

I'd like to print list item with the index of item such as

0: [('idx', 10), ('degree', 0)]
1: [('idx', 20), ('degree', 0)]

根据下面的代码，如何将0:"附加为整数 + 字符串 + 列表项?

Based on the code below, how can I append '0:' as integer + string + list item?

import logging

class Node(object):
    __slots__= "idx", "degree"

    def __init__(self, idx, degree):
        self.idx = idx
        self.degree = 0


    def items(self):
        "dict style items"
        return [
            (field_name, getattr(self, field_name))
            for field_name in self.__slots__]

def funcA():

    a = []
    a.append(Node(10, 0))
    a.append(Node(20, 0))

    for i in range(0, len(a)):
        logging.debug(a[i].items())

if __name__ == '__main__':
    logging.basicConfig(level=logging.DEBUG)  
    funcA()

目前，结果是

DEBUG:root:[('idx', 10), ('degree', 0)]
DEBUG:root:[('idx', 20), ('degree', 0)]

期待

DEBUG:root:0:[('idx', 10), ('degree', 0)]
DEBUG:root:1:[('idx', 20), ('degree', 0)]

推荐答案

我会这样做.

def funcA():
    a = []
    a.append(Node(10, 0))
    a.append(Node(20, 0))

    for i in range(0, len(a)):
        message = '%s:%s' % (i, a[i].items())
        logging.debug(message)

将其作为输出生成:

DEBUG:root:0:[('idx', 10), ('degree', 0)]
DEBUG:root:1:[('idx', 20), ('degree', 0)]

您也可以使用 join:

You could also use join:

message = ':'.join([str(i), str(a[i].items())])

或格式:

message = '{0}:{1}'.format(str(i), a[i].items())

什么对你来说最清楚.

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