Python Explained

[Assertion]

assert condition

you're telling the program to test that condition, and immediately trigger an error if the condition is false.

In Python, it's roughly equivalent to this:

if not condition:
    raise AssertionError()

==============================
[Creating list]
cubes = [i**3 for i in range(5)]
squares = [i**2 for i in range(5)] # or remove the **n
evens=[i**2 for i in range(10) if i**2 % 2 == 0]
==================
[String Methods] #https://www.programiz.com/python-programming/methods/string
msg = "Numbers: {0} {1} {2}". format(nums[0], nums[1], nums[2])

print(", ".join(["spam", "eggs", "ham"]))
#prints "spam, eggs, ham"

print("Hello ME".replace("ME", "world"))
#prints "Hello world"

print("This is a sentence.".startswith("This"))
# prints "True"

print("This is a sentence.".endswith("sentence."))
# prints "True"

print("This is a sentence.".upper())
# prints "THIS IS A SENTENCE."

print("AN ALL CAPS SENTENCE".lower())
#prints "an all caps sentence"

print("spam, eggs, ham".split(", "))
#prints "['spam', 'eggs', 'ham']"
==================
[Other functions]

nums = [55, 44, 33, 22, 11]

if all([i > 5 for i in nums]):
   print("All larger than 5")

if any([i % 2 == 0 for i in nums]):
   print("At least one is even")
==============
for v in enumerate(nums):
   print(v)
#(0, 55)
#(1, 44)
#(2, 33)