字典索引在格式化字符串中的引用
场景:
字典中有多个k:v需要格式化字符串中引用时,有个比较方便的写法
代码:
# 有如下结构的字典
In [21]: a = {
...: 'data':{
...: 'key1': 'value1',
...: 'key2': 'value2',
...: 'key3': 'value3'
...: }
...: }
# 常规写法:
In [22]: print("v1: %s, v2: %s, v3: %s" % (a['data']['key1'], a['data']['key2'], a['data']['key3']))
v1: value1, v2: value2, v3: value3
# 推荐写法:
In [23]: print("v1: %(key1)s, v2: %(key2)s, v3: %(key3)s" % a['data'])
v1: value1, v2: value2, v3: value3