如何在Python中漂亮地打印深度为~4的字典?我尝试用pprint()进行漂亮的打印,但它不起作用:

import pprint 
pp = pprint.PrettyPrinter(indent=4)
pp.pprint(mydict)

我只是想要一个缩进(“\t”)为每个嵌套,这样我就会得到这样的东西:

key1
    value1
    value2
    key2
       value1
       value2

等。

我该怎么做呢?


当前回答

This class prints out a complex nested dictionary with sub dictionaries and sub lists.  
##
## Recursive class to parse and print complex nested dictionary
##

class NestedDictionary(object):
    def __init__(self,value):
        self.value=value

    def print(self,depth):
        spacer="--------------------"
        if type(self.value)==type(dict()):
            for kk, vv in self.value.items():
                if (type(vv)==type(dict())):
                    print(spacer[:depth],kk)
                    vvv=(NestedDictionary(vv))
                    depth=depth+3
                    vvv.print(depth)
                    depth=depth-3
                else:
                    if (type(vv)==type(list())):
                        for i in vv:
                            vvv=(NestedDictionary(i))
                            depth=depth+3
                            vvv.print(depth)
                            depth=depth-3
                    else:
                        print(spacer[:depth],kk,vv) 

##
## Instatiate and execute - this prints complex nested dictionaries
## with sub dictionaries and sub lists
## 'something' is a complex nested dictionary

MyNest=NestedDictionary(weather_com_result)
MyNest.print(0)

其他回答

你可以通过PyYAML尝试YAML。它的输出可以微调。我建议从以下开始:

print(yaml.dump(data, allow_unicode=True, default_flow_style=False))

结果非常易读;如果需要,还可以解析回Python。

编辑:

例子:

>>> import yaml
>>> data = {'a':2, 'b':{'x':3, 'y':{'t1': 4, 't2':5}}}
>>> print(yaml.dump(data, default_flow_style=False))
a: 2
b:
  x: 3
  y:
    t1: 4
    t2: 5

我的第一个想法是JSON序列化器可能很擅长嵌套字典,所以我会欺骗并使用它:

>>> import json
>>> print(json.dumps({'a':2, 'b':{'x':3, 'y':{'t1': 4, 't2':5}}},
...                  sort_keys=True, indent=4))
{
    "a": 2,
    "b": {
        "x": 3,
        "y": {
            "t1": 4,
            "t2": 5
        }
    }
}

你可以使用打印字典

from print_dict import pd

dict1 = {
    'key': 'value'
} 

pd(dict1)

输出:

{
    'key': 'value'
}

此Python代码的输出:

{
    'one': 'value-one',
    'two': 'value-two',
    'three': 'value-three',
    'four': {
        '1': '1',
        '2': '2',
        '3': [1, 2, 3, 4, 5],
        '4': {
            'method': <function custom_method at 0x7ff6ecd03e18>,
            'tuple': (1, 2),
            'unicode': '✓',
            'ten': 'value-ten',
            'eleven': 'value-eleven',
            '3': [1, 2, 3, 4]
        }
    },
    'object1': <__main__.Object1 object at 0x7ff6ecc588d0>,
    'object2': <Object2 info>,
    'class': <class '__main__.Object1'>
}

安装:

$ pip install print-dict

披露:我是print-dict的作者

最python化的方法之一是使用已经构建的pprint模块。

定义打印深度所需的参数与您预期的深度相同

import pprint
pp = pprint.PrettyPrinter(depth=4)
pp.pprint(mydict)

就是这样!

从这个链接:

def prnDict(aDict, br='\n', html=0,
            keyAlign='l',   sortKey=0,
            keyPrefix='',   keySuffix='',
            valuePrefix='', valueSuffix='',
            leftMargin=0,   indent=1 ):
    '''
return a string representive of aDict in the following format:
    {
     key1: value1,
     key2: value2,
     ...
     }

Spaces will be added to the keys to make them have same width.

sortKey: set to 1 if want keys sorted;
keyAlign: either 'l' or 'r', for left, right align, respectively.
keyPrefix, keySuffix, valuePrefix, valueSuffix: The prefix and
   suffix to wrap the keys or values. Good for formatting them
   for html document(for example, keyPrefix='<b>', keySuffix='</b>'). 
   Note: The keys will be padded with spaces to have them
         equally-wide. The pre- and suffix will be added OUTSIDE
         the entire width.
html: if set to 1, all spaces will be replaced with '&nbsp;', and
      the entire output will be wrapped with '<code>' and '</code>'.
br: determine the carriage return. If html, it is suggested to set
    br to '<br>'. If you want the html source code eazy to read,
    set br to '<br>\n'

version: 04b52
author : Runsun Pan
require: odict() # an ordered dict, if you want the keys sorted.
         Dave Benjamin 
         http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/161403
    '''

    if aDict:

        #------------------------------ sort key
        if sortKey:
            dic = aDict.copy()
            keys = dic.keys()
            keys.sort()
            aDict = odict()
            for k in keys:
                aDict[k] = dic[k]

        #------------------- wrap keys with ' ' (quotes) if str
        tmp = ['{']
        ks = [type(x)==str and "'%s'"%x or x for x in aDict.keys()]

        #------------------- wrap values with ' ' (quotes) if str
        vs = [type(x)==str and "'%s'"%x or x for x in aDict.values()] 

        maxKeyLen = max([len(str(x)) for x in ks])

        for i in range(len(ks)):

            #-------------------------- Adjust key width
            k = {1            : str(ks[i]).ljust(maxKeyLen),
                 keyAlign=='r': str(ks[i]).rjust(maxKeyLen) }[1]

            v = vs[i]        
            tmp.append(' '* indent+ '%s%s%s:%s%s%s,' %(
                        keyPrefix, k, keySuffix,
                        valuePrefix,v,valueSuffix))

        tmp[-1] = tmp[-1][:-1] # remove the ',' in the last item
        tmp.append('}')

        if leftMargin:
          tmp = [ ' '*leftMargin + x for x in tmp ]

        if html:
            return '<code>%s</code>' %br.join(tmp).replace(' ','&nbsp;')
        else:
            return br.join(tmp)     
    else:
        return '{}'

'''
Example:

>>> a={'C': 2, 'B': 1, 'E': 4, (3, 5): 0}

>>> print prnDict(a)
{
 'C'   :2,
 'B'   :1,
 'E'   :4,
 (3, 5):0
}

>>> print prnDict(a, sortKey=1)
{
 'B'   :1,
 'C'   :2,
 'E'   :4,
 (3, 5):0
}

>>> print prnDict(a, keyPrefix="<b>", keySuffix="</b>")
{
 <b>'C'   </b>:2,
 <b>'B'   </b>:1,
 <b>'E'   </b>:4,
 <b>(3, 5)</b>:0
}

>>> print prnDict(a, html=1)
<code>{
&nbsp;'C'&nbsp;&nbsp;&nbsp;:2,
&nbsp;'B'&nbsp;&nbsp;&nbsp;:1,
&nbsp;'E'&nbsp;&nbsp;&nbsp;:4,
&nbsp;(3,&nbsp;5):0
}</code>

>>> b={'car': [6, 6, 12], 'about': [15, 9, 6], 'bookKeeper': [9, 9, 15]}

>>> print prnDict(b, sortKey=1)
{
 'about'     :[15, 9, 6],
 'bookKeeper':[9, 9, 15],
 'car'       :[6, 6, 12]
}

>>> print prnDict(b, keyAlign="r")
{
        'car':[6, 6, 12],
      'about':[15, 9, 6],
 'bookKeeper':[9, 9, 15]
}
'''