Python code how to find the number of all daffodils

Python code to find all daffodil numbers: first use the list to push through all three-digit numbers, and mark each number; then filter out the tuples marked as True; and finally the first sentence Put the second value of the filtered tuple into the list structure and add a print statement.

Python code to find the number of all daffodils:

Method one:

>>> 
>>> a = list(map(lambda x: x[1], filter(lambda x: x[0], [(i*100+j*10+k == i**3+j**3+k**3, i**3+j**3+k**3) for i in range(1, 10) for j in range(0, 10) for k in range(0, 10)])))
>>> print(a)
[153, 370, 371, 407]
>>>

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Instructions:

The above code can be broken down into three lines of code:

a = [(i*100+j*10+k == i**3+j**3+k**3, i**3+j**3+k**3) for i in range(1, 10) for j in range(0, 10) for k in range(0, 10)]
b = filter(lambda x: x[0], a)
c = list(map(lambda x: x[1], b))

The first sentence means using a list to push through all three digits, and each number is marked. If the daffodils are counting, mark True, if not, mark False. The marks and numbers are put into one ancestor: ( flag, value), all tuples are placed in a list structure.

The second sentence means to filter out the tuples marked as True.

The third sentence means c.

Add the print statement and execute the above three lines of code to understand.

Method 2:

Only use list derivation.

>>> a = [i**3+j**3+k**3 for i in range(1, 10) for j in range(0, 10) for k in range(0, 10) if i*100+j*10+k == i**3+j**3+k**3]
>>> print(a)
[153, 370, 371, 407]
>>>

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