我正在使用Python 2.7。 我试图比较词典中的价值项目。
我有两个问题。 首先是长度为1的字典中值的迭代。我总是得到一个错误，因为python不迭代整数而单个项作为值是python的整数。 我试图将项目更改为字符串。我试图将整个字典更改为字符串。在这些情况下，迭代比较逗号和括号，这不是目的。因此我复制了该项目。 key：1和key：4中的值是同一个项目，两次。这个解决方案有效，但它自然会改变一些结果。
第二个问题是匹配计数无法正常工作。 是的，因为第一个问题，但还有另一个问题。 我的代码将所有值项与字典中的所有其他值项进行比较。不比较相同的模数。如果比较中有一个匹配，则没有问题。 但是如果比较有两个匹配，代码将输出结果两次作为一个匹配。但我想要一个结果，有两场比赛。 代码包含很多注释，所以我希望你能解读它。
#dicModul is a dictionary with the modulnames(keys of dictionary) and the components of the modul(value of dictionary).
# If a modul consists of one component, it is impossible to iterate the modul, therefore this component is two times in a modul.
# Any ideas how to iterate a single value item in a dictionary?
dicModul = {0:(0,1),1:(1,1), 2:(2,3,4,5,6,1,7,2),
3:(8,1),4:(9,9), 5:(10,10,5,11,0,12,13), 6:(10,11,9,7)}
#The list is needed for the iteration and to operate the different modul in the dictionary by following for loops.
ModulList = [0,1,2,3,4,5,6]
#Counter is needed for counting same components in different moduls.
Counter = 0
for modKey in ModulList: #For-loop is needed for iteration of keys
for modKey2 in ModulList: #2nd for-loop of Modulkeys.The components of moduls have to be checked for matches in other moduls.
#Therefore a second iteration of the modul list is needed.
if modKey == modKey2: #Same moduls do not have to be checked.
print "Skip same Moduls"
Counter = 0 #The modkey2 have to changed by iteration. The counter have to be reset.
elif modKey != modKey2: #Different moduls have to be checked.
for modVal in dicModul[modKey]: #Iteration of components for iterated modul.
if modVal in dicModul[modKey2]: #Checking iterated components in different modul
Counter = Counter + 1 #If component was in different moduls, counter will add +1
print "Modul: "+str(modKey)+" % Modul: "+str(modKey2)+ " Matches= "+str(Counter)
#print function for both moduls and number of same components
Counter =0
我认为，如果此时关于上一个检查键和已检查键之间的分离，则计数器不会每次都从0开始。 我试图解决问题并寻找解决方案，但我没有找到这种情况。
loop on a dictionary (previous values) python
How to access previous/next element while for looping?
我想解决方案必须看起来像下一个代码 我用＃ - ＆gt;
标记了我的建议#dicModul is a dictionary with the modulnames(keys of dictionary) and the components of the modul(value of dictionary).
# If a modul consists of one component, it is impossible to iterate the modul, therefore this component is two times in a modul.
# Any ideas how to iterate a single value item in a dictionary?
dicModul = {0:(0,1),1:(1,1), 2:(2,3,4,5,6,1,7,2),
3:(8,1),4:(9,9), 5:(10,10,5,11,0,12,13), 6:(10,11,9,7)}
#The list is needed for the iteration and to operate the different modul in the dictionary by following for loops.
ModulList = [0,1,2,3,4,5,6]
#Counter is needed for counting same components in different moduls.
Counter = 0
for modKey in ModulList: #For-loop is needed for iteration of keys
for modKey2 in ModulList: #2nd for-loop of Modulkeys.The components of moduls have to be checked for matches in other moduls.
#Therefore a second iteration of the modul list is needed.
if modKey == modKey2: #Same moduls do not have to be checked.
print "Skip same Moduls"
Counter = 0 #The modkey2 have to changed by iteration. The counter have to be reset
elif modKey != modKey2: #Different moduls have to be checked.
for modVal in dicModul[modKey]: #Iteration of components for iterated modul.
if modVal in dicModul[modKey2]: #Checking iterated components in different modul
#-> if modKey2 == previous modKey2: #Checking if is the previous modul, so counter is not reset.
#-> Counter = Counter +1
#-> print "Modul: "+str(modKey)+" % Modul: "+str(modKey2)+ " Matches= "+str(Counter)
#-> else:
#-> Counter = 1 #Counter is setted 1, because a same component is found in a different modul.
elif:
Counter = 0
这是我期望的解决方案
Modul Modul Matches
skip same modul
0 1 1
0 2 1
0 3 1
0 4 0
0 5 1
skip same modul
1 2 1
1 3 1
1 4 0
1 5 0
skip same modul
2 3 1
2 4 0
2 5 1
2 6 1
skip same modul
3 4 0
3 5 0
skip same modul
4 5 0
4 6 1
skip same modul
5 6 3
答案 0 :(得分：0)
我建议你看一下for循环，以及它们是如何工作的。 Using domain name with WAMP是一个很棒的（免费）互动资源。我不是100％肯定我明白你在问什么，所以我主要是关注你的问题。我想我明白你要做的是什么，但如果我这样做，你就会让自己变得非常困难。
迭代包含单个项目的字典：
dicty = {'a': 1}
for key in dicty:
print key
迭代字典中的值和键：
for key, val in dicty.iteritems():
print key
print val
相当于：
for key in stuff:
val = stuff[key]
print key
print val
计数（键）匹配两个词：
count = 0
keys_counted = []
dicty_a = {'key1': 'val1', 'key2': 'val2'}
dicty_b = {'key1': 'val1', 'keyB': 'valB'}
for keyA, valA in dicty_a.iteritems():
for keyB, valB in dicty_b.iteritems():
if keyB == keyA and keyA not in keys_counted:
count += 1
keys_counted.append(valA)
确保不重复检查的最常见解决方案是构建列表，检查它，然后在最后将其丢弃。例如：
list_printed = []
for x in range(5):
for y in range(5):
if [x, y] not in list_printed:
print x, y
list_printed.append([y,x])
输出：
0 0
0 1
0 2
0 3
0 4
1 1
1 2
1 3
1 4
2 2
2 3
2 4
3 3
3 4
4 4
Enumerate()允许您获取字典中项目的键和值，或者如果您在列表中循环，则获取迭代次数和值。
关于迭代单个项目的问题。 Codeacademy，特别是单项。你需要尾随逗号或者它不是一个元组，它是一个int。老实说，这对我来说是一个错误，而不是一个功能，但乐观地说，它可能对某些计算机技术原因很重要，这远远超出了我的薪水。此外，区分列表[]和元组()的重要一点是元组是不可变的。在这种情况下，您可能不需要使用元组。话虽如此，你得到的错误只是因为，你说，你不能迭代一个整数：
loopy = (1,)
for x in loopy:
print x # this will _not_ raise an error
loopy = (1)
for x in loopy:
print x # this _will_ raise an error
loopy = [1]
for x in loopy:
print x # this will _not_ raise an error
loopy = 1
for x in loopy:
print x # this _will_ raise an error
将此应用于您要执行的操作：
dicModul = {0:(0,1),1:(1,1), 2:(2,3,4,5,6,1,7,2),
3:(8,1),4:(9,9), 5:(10,10,5,11,0,12,13), 6:(10,11,9,7)}
keys_checked = []
def get_tuple_matches(t1, t2):
counter = 0
matched_list = []
for x in t1:
for y in t2:
stuff = [x, y]
if stuff not in matched_list and x == y:
counter +=1
matched_list.append(stuff)
return counter
for key_outerloop, val_outerloop in dicModul.iteritems():
for key_innerloop, val_innerloop in dicModul.iteritems():
if key_outerloop == key_innerloop:
print "skip..."
elif [key_innerloop, key_outerloop] not in keys_checked:
matches = get_tuple_matches(val_outerloop, val_innerloop)
keys_checked.append([key_outerloop, key_innerloop])
print "Modul: " + str(key_outerloop) + " | Modul: " + str(key_innerloop) + " | Matches= "+ str(matches)
输出：
skip...
Modul: 0 | Modul: 1 | Matches= 1
Modul: 0 | Modul: 2 | Matches= 1
Modul: 0 | Modul: 3 | Matches= 1
Modul: 0 | Modul: 4 | Matches= 0
Modul: 0 | Modul: 5 | Matches= 1
Modul: 0 | Modul: 6 | Matches= 0
skip...
Modul: 1 | Modul: 2 | Matches= 1
Modul: 1 | Modul: 3 | Matches= 1
Modul: 1 | Modul: 4 | Matches= 0
Modul: 1 | Modul: 5 | Matches= 0
Modul: 1 | Modul: 6 | Matches= 0
skip...
Modul: 2 | Modul: 3 | Matches= 1
Modul: 2 | Modul: 4 | Matches= 0
Modul: 2 | Modul: 5 | Matches= 1
Modul: 2 | Modul: 6 | Matches= 1
skip...
Modul: 3 | Modul: 4 | Matches= 0
Modul: 3 | Modul: 5 | Matches= 0
Modul: 3 | Modul: 6 | Matches= 0
skip...
Modul: 4 | Modul: 5 | Matches= 0
Modul: 4 | Modul: 6 | Matches= 1
skip...
Modul: 5 | Modul: 6 | Matches= 2
skip...