python 将 ‘276000-404000 keV’ 转换成 decimal 格式
时间: 2024-05-01 17:23:44 浏览: 89
这里的字符串似乎是描述一个能量范围,可以理解成在 276000 到 404000 keV 之间的能量值。如果要将其转换为 decimal 格式,可以取该范围的平均值作为其代表值。
具体实现如下:
```python
s = '276000-404000 keV'
start, end = map(float, s.split(' ')[0].split('-'))
average = (start + end) / 2
print(average)
```
输出结果为:
```
340000.0
```
因此,该字符串对应的 decimal 值为 340000.0。
相关问题
ubuntu kev2
It seems like you are asking about the command to use `pip` in Ubuntu with Python 2.7 or Python 3.2 since you have both versions installed and `python` points to Python 2.7 by default.
To install packages using `pip` for a specific version, you need to specify the version number:
1. **For Python 2.7:**
```shell
sudo apt-get install python-pip # If pip is not already installed
pip2.7 install <package_name> # Replace <package_name> with the package you want to install
```
2. **For Python 3.2:**
```shell
sudo apt-get install python3-pip # If pip3 is not already installed
pip3.2 install <package_name> # Replace <package_name> with the package you want to install
```
Since Python 3.2 is somewhat outdated, it's recommended to use `pip3` with newer Python versions. If you're planning to use more recent packages, you may want to switch your system to use Python 3 as the default or update to a more maintained version of Python 3.
python判断数组包含某个值
在 Python 中,可以使用 `in` 关键字来判断一个元素是否在一个数组中,例如:
```python
my_list = [1, 2, 3, 4, 5]
if 3 in my_list:
print("my_list 包含数字 3")
```
输出:
```
my_list 包含数字 3
```
如果要判断一个元素是否不在一个数组中,可以使用 `not in`,例如:
```python
my_list = [1, 2, 3, 4, 5]
if 6 not in my_list:
print("my_list 不包含数字 6")
```
输出:
```
my_list 不包含数字 6
```
另外,如果要判断一个列表中是否包含另一个列表中的所有元素,可以使用 `all()` 函数,例如:
```python
list1 = [1, 2, 3]
list2 = [1, 2]
if all(item in list1 for item in list2):
print("list2 中的所有元素都在 list1 中")
```
输出:
```
list2 中的所有元素都在 list1 中
```
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