将元组列表中的元素转换为浮点数的Python程序

给定一个元组列表，将所有可能的可转换元素转换为浮点数。

Input : test_list = [(“3”, “Gfg”), (“1”, “26.45”)] 
Output : [(3.0, ‘Gfg’), (1.0, 26.45)] 
Explanation : Numerical strings converted to floats.

Input : test_list = [(“3”, “Gfg”)] 
Output : [(3.0, ‘Gfg’)] 
Explanation : Numerical strings converted to floats. 

方法 #1：使用循环 + isalpha() + float()

在这里，我们使用循环来迭代所有元组，使用 isalpha() 检查字母表，它无法转换为浮点数，其余元素使用 float() 进行转换。

Python3

# Python3 code to demonstrate working of 
# Convert Tuple List elements to Float
# Using loop + isalpha() + float
  
# initializing list
test_list = [("3", "Gfg"), ("1", "26.45"), ("7.32", "8"), ("Gfg", "8")]
  
# printing original list
print("The original list is : " + str(test_list))
  
res = []
for tup in test_list:
    temp = []
    for ele in tup:
          
        # check for string
        if ele.isalpha():
            temp.append(ele)
        else:
              
            # convert to float
            temp.append(float(ele))
    res.append((temp[0],temp[1]))
  
# printing result 
print("The converted list : " + str(res))

输出：

The original list is : [(‘3’, ‘Gfg’), (‘1’, ‘26.45’), (‘7.32’, ‘8’), (‘Gfg’, ‘8’)]
The converted list : [(3.0, ‘Gfg’), (1.0, 26.45), (7.32, 8.0), (‘Gfg’, 8.0)]

方法 #2：使用循环 + isalpha() + float() +列表理解

在这里，我们使用列表理解来执行迭代内部元组的任务。

蟒蛇3

# Python3 code to demonstrate working of 
# Convert Tuple List elements to Float
# Using loop + isalpha() + float
  
# initializing list
test_list = [("3", "Gfg"), ("1", "26.45"), ("7.32", "8"), ("Gfg", "8")]
  
# printing original list
print("The original list is : " + str(test_list))
  
res = []
for tup in test_list:
        
    # list comprehension to check for each case
    temp = [ele if ele.isalpha() else float(ele) for ele in tup]
    res.append((temp[0],temp[1]))
  
# printing result 
print("The converted list : " + str(res))

输出：

The original list is : [(‘3’, ‘Gfg’), (‘1’, ‘26.45’), (‘7.32’, ‘8’), (‘Gfg’, ‘8’)]
The converted list : [(3.0, ‘Gfg’), (1.0, 26.45), (7.32, 8.0), (‘Gfg’, 8.0)]