python codes and answers cheat code pdf
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python codes and answers cheat code pdf
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python codes and answers cheat code pdf
from array import array numbers = array("i", [1, 2, 3])
python codes and answers cheat code pdf
def increment(number, by=1): return number + by # Keyword arguments increment(2, by=1) # Variable number of arguments def multiply(*numbers): for number in numbers: print number multiply(1, 2, 3, 4) # Variable number of keyword arguments def save_user(**user): ... save_user(id=1, name="Mosh")
python codes and answers cheat code pdf
values = (x * 2 for x in range(10000)) len(values) # Error for x in values:
python codes and answers cheat code pdf
# Creating lists letters = ["a", "b", "c"] matrix = [[0, 1], [1, 2]] zeros = [0] * 5 combined = zeros + letters numbers = list(range(20)) # Accessing items letters = ["a", "b", "c", "d"] letters[0] # "a" letters[-1] # "d" # Slicing lists letters[0:3] # "a", "b", "c" letters[:3] # "a", "b", "c" letters[0:] # "a", "b", "c", "d" letters[:] # "a", "b", "c", "d" letters[::2] # "a", "c" letters[::-1] # "d", "c", "b", "a" # Unpacking first, second, *other = letters # Looping over lists for letter in letters: ... for index, letter in enumerate(letters): ... # Adding items letters.append("e") letters.insert(0, "-") # Removing items letters.pop() letters.pop(0) letters.remove("b") del letters[0:3] # Finding items if "f" in letters: letters.index("f") # Sorting lists letters.sort() letters.sort(reverse=True) # Custom sorting items = [ ("Product1", 10), ("Product2", 9), ("Product3", 11) ] items.sort(key=lambda item: item[1]) # Map and filter prices = list(map(lambda item: item[1], items)) expensive_items = list(filter(lambda item: item[1] >= 10, items)) # List comprehensions prices = [item[1] for item in items] expensive_items = [item for item in items if item[1] >= 10] # Zip function list1 = [1, 2, 3] list2 = [10, 20, 30] combined = list(zip(list1, list2)) # [(1, 10), (2, 20)]
python codes and answers cheat code pdf
if x == 1: print(“a”) elif x == 2: print(“b”) else: print(“c”) # Ternary operator x = “a” if n > 1 else “b” # Chaining comparison operators if 18 <= age < 65:
python codes and answers cheat code pdf
first = {1, 2, 3, 4} second = {1, 5} first | second # {1, 2, 3, 4, 5} first & second # {1} first - second # {2, 3, 4} first ^ second # {2, 3, 4, 5} if 1 in first: ...
python codes and answers cheat code pdf
first = [1, 2, 3] second = [4, 5, 6] combined = [*first, "a", *second] first = {"x": 1} second = {"y": 2} combined = {**first, **second}
python codes and answers cheat code pdf
point = (1, 2, 3) point(0:2) # (1, 2) x, y, z = point if 10 in point: ... # Swapping variables x = 10 y = 11 x, y = y, x
python codes and answers cheat code pdf
for n in range(1, 10): print(n) while n < 10: print(n) n += 1
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