Python – 用整数过滤元组

给定元组列表，过滤只有 int 数据类型的元组。

Input : [(4, 5, “GFg”), (3, ), (“Gfg”, )]
Output : [(3, )]
Explanation : 1 tuple (3, ) with all integral values.

Input : [(4, 5, “GFg”), (3, “Best” ), (“Gfg”, )]
Output : []
Explanation : No tuple with all integers.

方法 #1：使用循环 + isinstance()

在此，我们迭代每个元组并使用 isinstance() 检查除 int 以外的数据类型，如果找到的元组被标记为关闭并被忽略。

Python3

# Python3 code to demonstrate working of 
# Filter Tuples with Integers
# Using loop + isinstance()
  
# initializing list
test_list = [(4, 5, "GFg"), (5, 6), (3, ), ("Gfg", )]
  
# printing original list
print("The original list is : " + str(test_list))
  
res_list = []
for sub in test_list:
    res = True 
    for ele in sub:
          
        # checking for non-int.
        if not isinstance(ele, int):
            res = False 
            break
    if res :
        res_list.append(sub)
          
# printing results
print("Filtered tuples : " + str(res_list))

输出

The original list is : [(4, 5, 'GFg'), (5, 6), (3, ), ('Gfg', )]
Filtered tuples : [(5, 6), (3, )]

方法 #2：使用 all() + 列表理解 + isinstance()

在此，all() 用于使用 isinstance() 检查所有元素是否为整数，如果检查，则将元组添加到结果中。

Python3

# Python3 code to demonstrate working of 
# Filter Tuples with Integers
# Using all() + list comprehension + isinstance()
  
# initializing list
test_list = [(4, 5, "GFg"), (5, 6), (3, ), ("Gfg", )]
  
# printing original list
print("The original list is : " + str(test_list))
  
# list comprehension to encapsulate in 1 liner 
res = [sub for sub in test_list if all(isinstance(ele, int) for ele in sub)]
          
# printing results
print("Filtered tuples : " + str(res))

输出

The original list is : [(4, 5, 'GFg'), (5, 6), (3, ), ('Gfg', )]
Filtered tuples : [(5, 6), (3, )]