自定义函数要先声明,再使用,执行后会返回一个数值。 program ex0807 implicit none real :: a = 1 real :: b = 2 1. 2. 3. 4. 5. 6. 7. real, external :: add !声明add是一个函数,而不是变量。调用函数不必使用call命令。 write (*, *) add(a, b) stop end program
print('{0:<10}.{1:<8} : {2:<8}'.format(func.__module__, func.__name__, end - start)) return func_return_val return wrapper 接着，将该装饰器按如下方式应用在待测函数上： @timeit_wrapper def exp(x): ... print('{0:<10} {1:<8} {2:^8}'.format('module', 'function',...
While writing a program in python, you might need to end a program on several occasions after a condition is met. In this article, we will discuss different ways to terminate a program in python. Terminate a Program Using the quit() Function ...
恰好open()函数返回TextIOWrapper的一个实例,其__enter__方法返回self。但在不同的类中,__enter__方法也可能返回其他对象,而不是上下文管理器实例。 无论以何种方式退出with块的控制流,__exit__方法都会在上下文管理器对象上调用,而不是在__enter__返回的任何对象上调用。 with语句的as子句是可选的。在open的...
EOFError Raised when the input() function hits the end-of-file condition. FloatingPointError Raised when a floating point operation fails. GeneratorExit Raised when a generator's close() method is called. ImportError Raised when the imported module is not found. ...
So we used the int function to change that so that we can do the math. The append method adds the calculated value to the end of the list. Now that we know our network IP and our netmask, we can calculate our broadcast address: # Determine broadcast parameters from CIDR address and ...
deftest_func():try:m=1/0except NameError:print("Catch NameError in the sub-function")try:test_func()except ZeroDivisionError:print("Catch error in the main program") 子程序的try...except...结构无法处理相应的除以0的错误,所以错误被抛给上层的主程序。
5 6def timer(func): 7 """Print the runtime of the decorated function""" 8 @functools.wraps(func) 9 def wrapper_timer(*args, **kwargs): 10 start_time = time.perf_counter() 11 value = func(*args, **kwargs) 12 end_time = time.perf_counter() 13 run_time = end_time - start...
- Inspect live objects - Python 3.10.2 documentation中提到：注意高亮的部分，function 中有一个 _...
The run() function with the Shell parameter will almost always end up using the Command Prompt. The subprocess module uses the Windows COMSPEC environment variable, which in almost all cases will point to cmd.exe, the Command Prompt. By now, there are so many programs that equate COMSPEC to...