格式化字符串保留小数python
时间: 2023-10-15 19:28:00 浏览: 160
在Python中,有几种方法可以格式化字符串来保留小数位数。
方法一:使用百分号格式化字符串。可以使用"%.2f"的格式来保留两位小数。例如:
```python
a = 3.1415926
print("%.2f" % a) # 输出结果为3.14
```
方法二:使用round内置函数来进行四舍五入处理。例如:
```python
s = 12.345
a = round(s, 2)
print(a) # 输出结果为12.35
```
方法三:使用decimal模块来进行精确计算和保留小数。例如:
```python
from decimal import Decimal
s = 12.3445
a = Decimal(s).quantize(Decimal('0.00'))
print(a) # 输出结果为12.34
```
方法四:使用切片来截取小数位数。例如:
```python
s = 12.345
a = str(s).split('.')
s1 = a + '.' + a<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [python 怎么保留小数](https://blog.csdn.net/ekcchina/article/details/124769183)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* [Python保留小数的方法](https://blog.csdn.net/m0_46090675/article/details/117038785)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]
阅读全文