Question

我有一个嵌套循环，如下所示，

for num in range(10,20):     #to iterate between 10 to 20
    for i in range(2,num):    #to iterate on the factors of the number
        if num%i == 0:         #to determine the first factor
            j=num/i             #to calculate the second factor
            print '%d equals %d * %d' % (num,i,j)
            break #to move to the next number, the #first FOR
    else:                  # else part of the loop
        print num, 'is a prime number'

当我尝试在pdb中运行它时，

（pdb）对于范围（10,20）中的num：对于范围i中的（2，num）：如果num％i == 0：j = num / I;打印'％d等于％d *％d'％（num，i，j）;打破; else：打印num，“是素数”

我收到语法错误，我不知道如何在pdb中运行此代码，请建议我如何运行它。

Answer 1

该代码对我有用，没有语法错误。可能您正在尝试在python 3中运行python 2代码。尝试以下操作：

for num in range(10,20):     #to iterate between 10 to 20
    for i in range(2,num):    #to iterate on the factors of the number
        if num%i == 0:         #to determine the first factor
            j=num/i             #to calculate the second factor
            print(num,"equals",i*j)
            break #to move to the next number, the #first FOR
    else:                  # else part of the loop
        print(num, 'is a prime number')

，如果您提到语法错误，那就太好了。

如何在python的嵌套循环中运行pdb

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