1. “Hello, World!” in Python
print("Hello, World!")
2. Swap two variables without a temporary variable
a, b = b, a
3. Find the maximum element in a list
max_element = max(my_list)
4. List comprehension to square each element in a list
squared_list = [x**2 for x in my_list]
5. Check if a string contains a substring
contains_substring = 'substring' in my_string
6. Reverse a string
reversed_string = my_string[::-1]
7. Get the length of a list
length = len(my_list)
8. Sort a list in-place
my_list.sort()
9. Get the unique elements in a list
unique_elements = list(set(my_list))
10. Create a dictionary with a comprehension
my_dict = {
key: value for key, value in zip(keys, values)}
11. Read a file in one line
content = open('file.txt').read()
12. Count occurrences of an element in a list
count = my_list.count(element)
13. Check if a list is empty
is_empty = not bool(my_list)
14. Calculate the sum of a list
total = sum(my_list)
15. Get the first element of a list (or a default value)
first_element = my_list[0
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