dict 不包含预期的项目数
dict does not contain the expected number of items
我正在编写一个程序来遍历一个长数,将其转换为字符串,然后使用索引列表从长数中挑选出 10 个独立的连续数,然后将这十个数相乘并相加数字和结果到字典。然后我将索引列表值增加 1,并重复该过程,直到 运行 遍历整个数字。
然后我试图在字典中找到最大值,并让程序告诉我那个值。
我遇到的问题是我在程序中有一个错误检查机制,它告诉我字典中有多少对 key/value。它应该是 990,但我有 53。
如果有人能找出问题所在,我将永远感激不已。
要遵循的代码:
from functools import reduce
#define the number to test
testno = 7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450
#declare initial variables
index=[]
products = {}
count = 0
#define functions
def product(x):
return reduce((lambda a,b: a*b),x)
def increm(y):
return [x+1 for x in y]
#def runproduct(x):
# return product
def testnos(x):
return [int(str(x)[y]) for y in index]
#define the initial index
for x in range(10):
index = index+[x]
runtime = len(str(testno))-10
#start the while loop
while count < runtime:
products[str(testnos(testno))] = product(testnos(testno))
index = increm(index)
count+=1
print("[+] Number of results: "+str(len(str(products.values))))
print("[+] The numbers with the largest product are: "+str(max(products.keys(),key=(lambda k:products[k]))))
您的第一个 print
语句有问题。您目前正在将 products
转换成一个字符串,return 对您来说就像这样
{'[0, 8, 1, 3, 5, 3, 3, 6, 2, 7]': 0, ..., '[7, 8, 4, 6, 8, 6, 2, 2, 4, 8]': 8257536}
应用内置的 len
将 return 结果 53。你真正想要的是直接在你的 products
变量上调用 len
。
>>> print("[+] Number of results: {}".format(len(products)))
[+] Number of results: 990
构建字符串时考虑使用 format
函数。您可以使用 PyFormat website 作为参考。
我正在编写一个程序来遍历一个长数,将其转换为字符串,然后使用索引列表从长数中挑选出 10 个独立的连续数,然后将这十个数相乘并相加数字和结果到字典。然后我将索引列表值增加 1,并重复该过程,直到 运行 遍历整个数字。
然后我试图在字典中找到最大值,并让程序告诉我那个值。
我遇到的问题是我在程序中有一个错误检查机制,它告诉我字典中有多少对 key/value。它应该是 990,但我有 53。
如果有人能找出问题所在,我将永远感激不已。
要遵循的代码:
from functools import reduce
#define the number to test
testno = 7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450
#declare initial variables
index=[]
products = {}
count = 0
#define functions
def product(x):
return reduce((lambda a,b: a*b),x)
def increm(y):
return [x+1 for x in y]
#def runproduct(x):
# return product
def testnos(x):
return [int(str(x)[y]) for y in index]
#define the initial index
for x in range(10):
index = index+[x]
runtime = len(str(testno))-10
#start the while loop
while count < runtime:
products[str(testnos(testno))] = product(testnos(testno))
index = increm(index)
count+=1
print("[+] Number of results: "+str(len(str(products.values))))
print("[+] The numbers with the largest product are: "+str(max(products.keys(),key=(lambda k:products[k]))))
您的第一个 print
语句有问题。您目前正在将 products
转换成一个字符串,return 对您来说就像这样
{'[0, 8, 1, 3, 5, 3, 3, 6, 2, 7]': 0, ..., '[7, 8, 4, 6, 8, 6, 2, 2, 4, 8]': 8257536}
应用内置的 len
将 return 结果 53。你真正想要的是直接在你的 products
变量上调用 len
。
>>> print("[+] Number of results: {}".format(len(products)))
[+] Number of results: 990
构建字符串时考虑使用 format
函数。您可以使用 PyFormat website 作为参考。