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Python practice problems help beginners to become experts in a python programming language with a small amount of practice effort.
Write a Python function that returns the even numbers of a list.
[1, 2, 3, 4, 5, 6, 7, 8, 9]
[2, 4, 6, 8]
def evens(numbers): return [n for n in numbers if n % 2 == 0] print(evens([1, 2, 3, 4, 5, 6, 7, 8, 9]))[2, 4, 6, 8]
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Write a Python function that returns True if a number is prime.
7, 12, 1
[(7, True), (12, False), (1, False)]
def is_prime(n): if n < 2: return False for d in range(2, int(n ** 0.5) + 1): if n % d == 0: return False return True print([(n, is_prime(n)) for n in [7, 12, 1]])[(7, True), (12, False), (1, False)]
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Write a Python function that returns a new list with the unique elements of a list, in order.
[2, 2, 3, 1, 4, 4, 4, 4, 4, 6]
[2, 3, 1, 4, 6]
def unique(items): result = [] for x in items: if x not in result: result.append(x) return result print(unique([2, 2, 3, 1, 4, 4, 4, 4, 4, 6]))[2, 3, 1, 4, 6]
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Write a Python function to check whether a number is within a range (inclusive).
7 in 2 to 20; 25 in 2 to 20
7 is in the range 25 is outside the range
def in_range(n, low, high): return low <= n <= high for n in [7, 25]: print(n, "is in the range" if in_range(n, 2, 20) else "is outside the range")7 is in the range 25 is outside the range
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Write a Python function to reverse a string.
"Python1234"
4321nohtyP
text[::-1].def reverse(text): return text[::-1] print(reverse("Python1234"))4321nohtyP
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Write a Python function to multiply all the numbers in a list.
[-8, 6, 1, 9, 2]
-864
def product(numbers): result = 1 for n in numbers: result *= n return result print(product([-8, 6, 1, 9, 2]))-864
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Write a Python function to find the maximum of three numbers.
17, 21, -9
21
def max_of_two(a, b): return a if a > b else b def max_of_three(a, b, c): return max_of_two(a, max_of_two(b, c)) print(max_of_three(17, 21, -9))21
Building on a smaller function keeps each one simple.
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Write a Python function that prints the multiplication table of a number.
9
9 x 1 = 9 9 x 2 = 18 9 x 3 = 27 9 x 4 = 36 9 x 5 = 45 9 x 6 = 54 9 x 7 = 63 9 x 8 = 72 9 x 9 = 81 9 x 10 = 90
def table(n, upto=10): for i in range(1, upto + 1): print(f"{n} x {i:2} = {n * i}") table(9)9 x 1 = 9 9 x 2 = 18 9 x 3 = 27 9 x 4 = 36 9 x 5 = 45 9 x 6 = 54 9 x 7 = 63 9 x 8 = 72 9 x 9 = 81 9 x 10 = 90
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Write a Python function that prints a string 10 times.
"sqa"
sqa sqa sqa sqa sqa sqa sqa sqa sqa sqa hi hi hi
def repeat(text, times=10): for _ in range(times): print(text, end=" ") print() repeat("sqa")repeat("hi", 3)sqa sqa sqa sqa sqa sqa sqa sqa sqa sqa hi hi hi
times=10 is a default value, used when the caller leaves it out.
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Write a Python function that adds two numbers and returns the result.
12, 30
42 3.0
add(a, b) that returns a + b.def add(a, b): return a + b print(add(12, 30))print(add(2.5, 0.5))42 3.0
a and b are parameters; their values come from the call.
return hands the result back so the caller can use it.
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