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, xpython codes and answers cheat code pdf
for n in range(1, 10):
print(n)
while n < 10:
print(n)
n += 1Copyright © 2021 Codeinu
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