def repatstr(str,times): repeated_strs=str*times returnrepeated_strs repatstr_string=repatstr("sunliyuan",4) print(repatstr_string) # 全局变量和局部变量 x = 60 def foo(x): print("x is :"+str(x)) x=3 print("change local x to"+str(x)) foo(x) print ('x is still',str(x)...
python timeit.py [-n N] [-r N] [-s S] [-p] [-h] [--] [statement]Options:-n/--number N: how many timestoexecute'statement' (default: see below)-r/--repeat N: how many timestorepeat the timer (default5) -s/--setup S: statementtobe executed once initially (default'pass')...
cycle("123"): print(i,end=" ") if sum > 10: break sum += int(i) print() # 输出 :1 2 3 1 2 3 1 # 3.repeat(obj,times) """ obj : 循环的对象 times : 循环的次数 """ for x in itertools.repeat("hello",2): print(x,end=" ") print() #输出...
2. NumPy repeat array n times using repeat() function One of the best ways to repeat elements of an array in Python is by using NumPy’s repeat function. This function repeats each element of the array n times in Python. Here is the complete code, of how Python repeat array n times:...
itertools.repeat(elem, times=None): 创建一个无限迭代器,重复生成elem指定的元素,可选参数times指定重复的次数。 itertools.chain(*iterables): 将多个迭代器连接成一个迭代器,依次返回每个迭代器中的元素。 itertools.islice(iterable, start, stop, step=1): 返回一个迭代器,生成iterable中从start到stop(不包括...
def repeat(times): def decorator(func): @wraps(func) def wrapper(*args, **kwargs): for _ in range(times): func(*args, **kwargs) return wrapper return decorator @repeat(3) def say_hello(): print("Hello") say_hello() 6. Method Decorator To apply a decorator to a method within ...
The * operator allows you to repeat a given string a certain number of times. In this context, this operator is known as the repetition operator. Its syntax is shown below:Python new_string = string * n new_string = n * string ...
how_many_times+=-1ifhow_many_times==0:print(datetime.datetime.now(),'stop it.')return# 每次调用设定一个时间间隔print(datetime.datetime.now(),'have a rest')how_long=random.randint(30,120)time.sleep(how_long)returnrepeat_myself(how_many_times)repeat_myself(12) ...
In the first example, you use the function to create an empty string. In the other examples, you get strings consisting of the object’s literals between quotes, which provide user-friendly representations of the objects. At first glance, these results may not seem useful. However, there are...
Anytime you have need to repeat a block of code a fixed amount of times. If you do not know the number of times it must be repeated, use a “while loop” statement instead. For loop Python Syntax The basic syntax of the for loop in Python looks something similar to the one mentioned...