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Python program to Convert a elements in a list of Tuples to Float

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  • Last Updated : 24 Oct, 2020
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Given a Tuple list, convert all possible convertible elements to float.

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. 

Method #1 : Using loop + isalpha() + float()

In this, we use a loop to iterate for all the tuples, check for alphabets using isalpha(), which cannot be converted to float, and for the rest of the elements float() is used to convert. 

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))


Output:

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)]

Method #2 : Using loop + isalpha() + float() + list comprehension

In this, we perform the task of iterating through inner tuples using list comprehension.

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:
        
    # 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))


Output:

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)]


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