Python程序在字典中查找最大值元组的键

给定一个值作为元组的字典，任务是编写一个Python程序来找到最大值元组的键。

例子：

Input : test_dict = {‘gfg’ : (“a”, 3), ‘is’ : (“c”, 9), ‘best’ : (“k”, 10), ‘for’ : (“p”, 11), ‘geeks’ : (‘m’, 2)}

Output : for

Explanation : 11 is maximum value of tuple and for key “for”.

Input : test_dict = {‘gfg’ : (“a”, 13), ‘is’ : (“c”, 9), ‘best’ : (“k”, 10), ‘for’ : (“p”, 1), ‘geeks’ : (‘m’, 2)}

Output : gfg

Explanation : 13 is maximum value of tuple and for key “gfg”.

方法 #1：使用max() + values() + next()

在此，使用 max() 找到所有元组值的最大值，并使用 values() 提取值。 next()，用于使用迭代器访问方法进行迭代，并将每个元组值与最大值进行比较。

Python3

# Python3 code to demonstrate working of
# Maximum tuple value key
# Using max() + values() + next()
  
# initializing dictionary
test_dict = {'gfg': ("a", 3), 'is': ("c", 9), 'best': (
    "k", 10), 'for': ("p", 11), 'geeks': ('m', 2)}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# getting maximum value
max_val = max(test_dict.values(), key=lambda sub: sub[1])
  
# getting key with maximum value using comparison
res = next(key for key, val in test_dict.items() if val == max_val)
  
# printing result
print("The maximum key : " + str(res))

输出：

The original dictionary is : {‘gfg’: (‘a’, 3), ‘is’: (‘c’, 9), ‘best’: (‘k’, 10), ‘for’: (‘p’, 11), ‘geeks’: (‘m’, 2)}

The maximum key : for

方法 #2：使用列表理解+ max() + values()

在这里，我们使用列表理解来执行获取所有最大匹配值的任务。使用 max() 获得最大值。

蟒蛇3

# Python3 code to demonstrate working of
# Maximum tuple value key
# Using list comprehension + max() + values()
  
# initializing dictionary
test_dict = {'gfg': ("a", 3), 'is': ("c", 9), 'best': (
    "k", 10), 'for': ("p", 11), 'geeks': ('m',  2)}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# getting maximum value
max_val = max(test_dict.values(), key=lambda sub: sub[1])
  
# getting key with maximum value using comparison
res = [key for key, val in test_dict.items() if val == max_val][0]
  
# printing result
print("The maximum key : " + str(res))

输出：

The original dictionary is : {‘gfg’: (‘a’, 3), ‘is’: (‘c’, 9), ‘best’: (‘k’, 10), ‘for’: (‘p’, 11), ‘geeks’: (‘m’, 2)}

The maximum key : for