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How to Convert List to String

python
list-conversions
string-conversions
pythonic-code
Alex KataevbyAlex Kataev·Sep 14, 2024
TLDR

To join a list of strings into a single string, use the sleek join():

words = ["Hello", "World"] sentence = " ".join(words) print(sentence) # Output: Hello World

Need to handle a list with non-string elements like master? Look no further:

numbers = [100, 200, 300] concatenated = ", ".join(map(str, numbers)) print(concatenated) # Output: 100, 200, 300

Those examples your fast entry points. We'll go on a journey uncovering custom logic, handling complex objects, and slaying common mistakes.

Tailored conversions for superior coders

5-star sort function

Make sort function your sidekick while joining. Because being the coolest programmer in town means never settling for less:

your_list = ["banana", "Cherry", "Apple"] joined_sorted_list = " ".join(sorted(your_list, key=str.lower)) # no fruit discrimination here 🍎🍌🍒 print(joined_sorted_list) # Output: Apple banana Cherry

Talking complex objects

Your list is filled with bizarre objects? Time to bring "Convert & Conquer" to action:

class Fruit: def __init__(self, name): self.name = name def __str__(self): return f"Fruit({self.name})" fruits = [Fruit("Apple"), Fruit("Banana"), Fruit("Cherry")] # a frantic fruit salad str_fruits = ", ".join(map(str, fruits)) # here comes the dressing print(str_fruits) # Output: Fruit(Apple), Fruit(Banana), Fruit(Cherry)

Silence is golden

Especially when separators aren't needed:

letters = ['H', 'e', 'l', 'l', 'o'] word = ''.join(letters) # silent as a hacker typing speed print(word) # Output: Hello

Trap Cards (More like errors) You Can Dodge

Mixed type lists: Handle with care

Struggling with non-string elements? Try str conversion, or face Python's wrath with a TypeError:

mixed_list = [True, "2", 3, 4.0] try: str_mixed = ''.join(mixed_list) # Python: You shall not pass 🧙‍♂️ except TypeError as e: print("Error:", e) # Can't join non-str to str

Debug like a Pro

Remember: All non-string elements must be crushed (converted, actually) before using join():

# The art of debugging with easy conversions mixed_list = [True, "2", 3, 4.0] str_mixed = ''.join(map(str, mixed_list)) print(str_mixed) # Output: True234.0

Efficiency with Style: The Marriage of Elegance and Performance

Compact code, wide applause

Nothing shouts elegance than a compact join():

compact_result = ''.join(map(str, range(10))) # Output: 0123456789 print(compact_result) # Running out of fingers to count 🖐️

Transform and join, all in one go

Behold, list comprehension and join() executing a flawless tango:

str_numbers = ' - '.join([str(number) for number in range(5)]) # 1, 2, ChaChaCha... print(str_numbers) # Output: 0 - 1 - 2 - 3 - 4

Compile your code with join(), and embark your journey to Pythonic strength.