defdivide_list_by_number(lst,number):return[x/numberforxinlst] 1. 2. 在这个函数中,我们接受两个参数:一个列表lst和一个除数number。我们使用列表推导式来创建一个新的列表,其中每个元素都是原列表中的元素除以除数。 接下来,我们可以使用这个函数来解决上述问题。假设我们有一个名为scores的列表,其中包含一...
下面是调用函数的示例代码: normalized_data=divide_column_by_number(data,2,10) 1. 这行代码将调用divide_column_by_number函数,并将示例数据集、列索引为2(成绩列)和除数为10作为参数传递给函数。函数将返回归一化处理后的数据集。 步骤4:打印结果 最后,我们可以打印归一化处理后的数据集来验证函数的正确性。
print(f'10 divided by {number} is {10 / number}.') except ZeroDivisionError: print("You can't divide zero.") except TypeError: print("You can only divide a number.") def with_LBYL_divide_ten_by(number): if isinstance(number, int) or isinstance(number, float): if number == 0: p...
def divide(a: float, b: float) -> Union[float, None]: """ Divide one number by another, returning the quotient. Args: a (float): The dividend. b (float): The divisor. Must not be zero. Returns: float or None: The quotient when b is not zero; otherwise, returns None. ...
# 示例 numbers = [1, 2, 3, 4, 5] first_number = numbers[0] print(first_number) # 输出: 1 [2]反向取值 # 示例 numbers = [1, 2, 3, 4, 5] last_number = numbers[-1] print(last_number) # 输出: 5 [3]索引取值无则报错 对于list来说,既可以按照索引取值,又可以按照索引修改指...
In [7]: import numpy as np In [8]: my_arr = np.arange(1_000_000) In [9]: my_list = list(range(1_000_000)) 现在让我们将每个序列乘以 2: 代码语言:javascript 复制 In [10]: %timeit my_arr2 = my_arr * 2 309 us +- 7.48 us per loop (mean +- std. dev. of 7 runs, ...
try:x = int(input("Enter a number: "))y = 10 / xexcept ValueError:print("Invalid input. Please enter a valid number.")except ZeroDivisionError:print("Cannot divide by zero.")else:print(f"The result is: {y}")finally:print("Execution completed.")这个例子演示了如何捕获和处理 ValueError ...
pip install package_name==version_number # to uninstall apackage pip uninstall package_name # to show installedpackages pip list # to show theinformation about a particular package pip show package_name # to install alist of dependencies, such as to clone a virtual environment pip install -r...
我们可以将该类加载到 Python 3 解释器中,这样我们就可以交互式地使用它。为了做到这一点,将前面提到的类定义保存在一个名为first_class.py的文件中,然后运行python -i first_class.py命令。-i参数告诉 Python运行代码然后转到交互式解释器。以下解释器会话演示了与这个类的基本交互:...
# install a particular versionpip install package_name==version_number # to uninstall a packagepip uninstall package_name # to show installed packagespip list # to show the information about a particular packagepip show package_name # to install a...