Python Program To Convert dictionary values to Strings

Given dictionary with mixed data types as values, the task is to write a Python program to convert to parsed strings by different delims.

Examples:

Input : test_dict = {‘Gfg’ : 4, ‘is’ : “1”, ‘best’ : [8, 10], ‘geek’ : (10, 11, 2)}, list_delim, tuple_delim = ‘-‘, ‘^’
Output : {‘Gfg’: ‘4’, ‘is’: ‘1’, ‘best’: ‘8-10’, ‘geek’: ’10^11^2′}
Explanation : List elements are joined by -, tuples by ^ symbol.

Input : test_dict = {‘Gfg’ : 4, ‘is’ : “1”, ‘best’ : [8, 10], ‘geek’ : (10, 11, 2)}, list_delim, tuple_delim = ‘*’, ‘,’
Output : {‘Gfg’: ‘4’, ‘is’: ‘1’, ‘best’: ‘8*10’, ‘geek’: ‘10,11,2’}
Explanation : List elements are joined by *, tuples by , symbol.

Example: Using loop + isinstance() + join()

In this, we check for all the values data types using isinstance() and join using join() for difference delims, converting to parsed strings.

Python3

# Python3 code to demonstrate working of
# Convert dictionary values to Strings
# Using loop + isinstance()

# initializing dictionary
test_dict = {'Gfg' : 4,
             'is' : "1",
             'best' : [8, 10],
             'geek' : (10, 11, 2)}

# printing original dictionary
print("The original dictionary is : " + str(test_dict))

# initializing delims
list_delim, tuple_delim = '-', '^'

res = dict()
for sub in test_dict:

    # checking data types
    if isinstance(test_dict[sub], list):
        res[sub] = list_delim.join([str(ele) for ele in test_dict[sub]])
    elif isinstance(test_dict[sub], tuple):
        res[sub] = tuple_delim.join(list([str(ele) for ele in test_dict[sub]]))
    else:
      res[sub] = str(test_dict[sub])

# printing result
print("The converted dictionary : " + str(res))

Output

The original dictionary is : {'Gfg': 4, 'is': '1', 'best': [8, 10], 'geek': (10, 11, 2)}
The converted dictionary : {'Gfg': '4', 'is': '1', 'best': '8-10', 'geek': '10^11^2'}

Method #2: Using dictionary comprehension

Approach

Using dictionary comprehension with type checking

Algorithm

1. Define a function named convert_dict_values_to_strings that takes three parameters test_dict, list_delim, tuple_delim.
2. Create a new dictionary using dictionary comprehension.
3. Iterate over the key-value pairs in the input dictionary.
4. If the value is a list, join the list elements with the list_delim and add the resulting string to the new dictionary.
5. If the value is a tuple, join the tuple elements with the tuple_delim and add the resulting string to the new dictionary.
6. If the value is a string, add it as it is to the new dictionary.
7. If the value is of any other type, convert it to a string and add it to the new dictionary.
8. Return the new dictionary.

Python3

def convert_dict_values_to_strings(test_dict, list_delim, tuple_delim):
    # Create a new dictionary using dictionary comprehension
    # Iterate over the key-value pairs in the input dictionary
    # If the value is a list, join the list elements with the `list_delim` and add the resulting string to the new dictionary
    # If the value is a tuple, join the tuple elements with the `tuple_delim` and add the resulting string to the new dictionary
    # If the value is a string, add it as it is to the new dictionary
    # If the value is of any other type, convert it to a string and add it to the new dictionary
    new_dict = {k: list_delim.join(map(str, v)) if isinstance(v, list) else tuple_delim.join(map(str, v)) if isinstance(v, tuple) else str(v) for k, v in test_dict.items()}
    return new_dict


# Example
test_dict = {'Gfg' : 4, 'is' : '1', 'best' : [8, 10], 'geek' : (10, 11, 2)}
list_delim, tuple_delim = '-', '^'
print(convert_dict_values_to_strings(test_dict, list_delim, tuple_delim))

Output

{'Gfg': '4', 'is': '1', 'best': '8-10', 'geek': '10^11^2'}

Time Complexity: O(n*m), where n is the number of key-value pairs in the input dictionary and m is the size of the longest list or tuple value.
Auxiliary Space: O(n), for storing the new dictionary.