# 打印Python字典

**标准字典打印方法有时候难以阅读（单行表达）**

```python
>>> my_mapping = {'a': 23, 'b': 42, 'c': 0xc0ffee}
>>> my_mapping
{'b': 42, 'c': 12648430. 'a': 23}
```

{% hint style="info" %}
**"json" 模块可以以另一种方式打印字典**
{% endhint %}

```python
>>> import json

>>> json_dict = json.dumps(
    my_mapping,    # 将字典转化为 json 格式
    indent=4,    # 设置缩进为 4
    sort_keys=True)    # 以 key 排序
>>> print()
{
    "a": 23,
    "b": 42,
    "c": 12648430
}

# 注意该方法只适用于 key 为原子类型（str,int ...)的字典
>>> json.dumps({all: 'yup'})
TypeError: keys must be a string
```


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