range函数还可以与Python中的其他集合类型结合使用,例如列表、元组等。让我们看看如何通过将range生成的序列转换为列表来进行更复杂的操作。 示例代码:生成负数列表并计算总和 negative_numbers=list(range(-5,0))total=sum(negative_numbers)print(f"Negative Numbers:{negative_numbers}")print(f"Total Sum:{total}"...
1. 理解range()函数的基本用法 在Python 中,range()是一个内置函数,其基本用法是: # range(start, stop[, step]) 1. start是起始值,stop是终止值,step是步长。 2. 使用range()函数生成负数值 如果我们想要生成一个负数范围,比如从 -1 到 -10,我们可以这样设置参数: negative_range=range(-1,-11,-1)...
# printing range from negative to positivefornuminrange(-2,5,1):print(num, end=", ") Python范围从正数到负数 在此示例中,我们可以学习如何有效地使用step参数来显示从正到负的数字。 print(" printing range from Positive to Negative")fornuminrange(2,-5,-1):print(num, end=", ") 将range(...
the legal indices for items of a sequence of length 10. It is possible to let the range start at another number, or to specify a different increment (even negative; sometimes this is called the ‘step’):给定的终点永远不是生成序列的一部分；范围（10）生成10个值，长度为10的序列的项目...
range(start, stop[, step]) The return value is calculated by the following formula with the given constraints: r[n] = start + step*n (forboth positiveandnegative step)where, n >=0andr[n] < stop (forpositive step)where, n >= 0andr[n] > stop (fornegative step) ...
As long as step is one or negative one, it’s straightforward to reverse a range: Python >>> def reverse_range(rng): ... return range( ... rng.stop - rng.step, ... rng.start - rng.step, ... -rng.step, ... ) ... >>> reverse_range(range(5, 0, -1)) range(1,...
positive, negative): # anchor: 2D tensor [BATCH_SIZE, DIM] , positive: 2D tensor [BATCH_SIZE, DIM] , negative: 2D tensor [BATCH_SIZE, DIM] , DIM : feature vector dimension (e.g., 128) , BATCH_SIZE : batch size 32 , the input tensors should be normalized to [0,1] range. ,...
a=np.random.rand(100000)b=np.random.rand(100000)tic=time.time()foriinrange(100000):c+=a[i]*b[i]toc=time.time()print(c)print("for loop:"+str(1000*(toc-tic))+"ms")c=0tic=time.time()c=np.dot(a,b)toc=time.time()print(c)print("Vectorized:"+str(1000*(toc-tic))+"ms")...
negative_float = -2.718 zero_float = 0.0 运算规则: 浮点型数据支持所有的基本数学运算,包括加法、减法、乘法、除法和取模。 # 加法 float_addition = 1.5 + 2.5 # 减法 float_subtraction = 4.0 - 1.0 # 乘法 float_multiplication = 2.0 * 3.0 ...
“Remember that Python starts counting indexes from 0 not 1. Just like it does with the range function, it considers the range of values between the first and one less than last number. 2. Modifying strings: Apart from trying to access certain characters inside a string, we might want to...