Python 多行 pprint 字典
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pprint dictionary on multiple lines
提问by mulllhausen
I'm trying to get a pretty print of a dictionary, but I'm having no luck:
我正在尝试打印一本漂亮的字典，但我没有运气：
>>> import pprint
>>> a = {'first': 123, 'second': 456, 'third': {1:1, 2:2}}
>>> pprint.pprint(a)
{'first': 123, 'second': 456, 'third': {1: 1, 2: 2}}
I wanted the output to be on multiple lines, something like this:
我希望输出在多行上，如下所示：
{'first': 123,
'second': 456,
'third': {1: 1,
2: 2}
}
Can pprintdo this? If not, then which module does it? I'm using Python 2.7.3.
可以pprint这样做吗？如果不是，那么是哪个模块呢？我正在使用Python 2.7.3。
采纳答案by Warren Weckesser
Use width=1or width=-1:
使用width=1或width=-1：
In [33]: pprint.pprint(a, width=1)
{'first': 123,
'second': 456,
'third': {1: 1,
2: 2}}
回答by UngodlySpoon
If you are trying to pretty print the environment variables, use:
如果您想漂亮地打印环境变量，请使用：
pprint.pprint(dict(os.environ), width=1)
回答by Ryan Chou
You could convert the dict to json through json.dumps(d, indent=4)
您可以通过将 dict 转换为 json json.dumps(d, indent=4)
print(json.dumps(item, indent=4))
{
"second": 456,
"third": {
"1": 1,
"2": 2
},
"first": 123
}
回答by Zach Valenta
Two things to add on top of Ryan Chou's already very helpful answer:
除了 Ryan Chou 已经非常有用的答案之外，还有两件事要添加：
- pass the
sort_keysargument for an easier visual grok on your dict, esp. if you're working with pre-3.6 Python (in which dictionaries are unordered)
sort_keys在你的 dict 上传递一个更容易视觉grok的参数，尤其是。如果您使用的是 3.6 之前的 Python（其中字典是无序的）
print(json.dumps(item, indent=4, sort_keys=True))
"""
{
"first": 123,
"second": 456,
"third": {
"1": 1,
"2": 2
}
}
"""
dumps()will only work if the dictionary keys are primitives (strings, int, etc.)
dumps()仅当字典键是基元（字符串、整数等）时才有效
