How to print list item + integer/string using logging in Python

python, python-2.7

Solution

I would do it like this.

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)

Which produces this as output:

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

You could also use join:

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

Or format:

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

Whatever is the most clear to you.

Problem

I'd like to print list item with the index of item such as ``` 0: [('idx', 10), ('degree', 0)] 1: [('idx', 20), ('degree', 0)] ``` 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() ``` Currently, result is ``` DEBUG:root:[('idx', 10), ('degree', 0)] DEBUG:root:[('idx', 20), ('degree', 0)] ``` Expecting ``` DEBUG:root:0:[('idx', 10), ('degree', 0)] DEBUG:root:1:[('idx', 20), ('degree', 0)] ```

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