qmmr · March 10, 2019 12:56
diff --git a/tipc_and_tricks.py b/tipc_and_tricks.py
 """
 A collection of useful tips when working with Python 3
 """

 import json
 #  from collections import Hashable
 from random import choice, randrange
 # Check if sth is "hashable" cause Sets only store unique and hashable items
 # Whereas Lists can store anything
 #  print("Is empty object {} hashable? -> {0:b} ")
 #  print(isinstance({}, Hashable))

 primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41,
          43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]

 # Iterate over list with index and value
 for idx, val in enumerate(primes):
    print("At index {idx} is {prime}".format(idx=idx, prime=val))

 print("\n\n---\n\n")

 # Randomly select element from the list
 alphabet = ["a", "b", "c", "d", "e", "f",
            "g", "h", "l", "m", "n", "o", "p", "q"]
 print("The randomly chosen letter is \"{0:s}\"".format(choice(alphabet)))

 # Using ranrange to select random index
 randIndex = randrange(0, len(alphabet))
 print("The randomly chosen letter is \"{0:s}\"".format(alphabet[randIndex]))

 print("\n\n---\n\n")

 # How to transform Lists into other data structures
 # List of strings
 list_of_strings = ["Hey", " ", "there", "!"]
 welcome_message = "".join(list_of_strings)
 print(welcome_message)

 # List of integers
 list_of_integers = [1, 2, 3]
 print("-".join(str(n) for n in list_of_integers))

 print("\n\n---\n\n")

 # List to a Tuple - Tuples are immutable!
 alphabet_tuple = tuple(alphabet)
 print(alphabet_tuple)

 print("\n\n---\n\n")

 # List to a Set - Set can contain only unique, hashable items and there is no order
 my_set = set(["a", "b", "b", "c", "d", "d"])
 print(my_set)
 print("is char \"a\" in set? {0:b}".format("a" in my_set))
 print("is char \"f\" in set? {0:b}".format("f" in my_set))

 print("\n\n---\n\n")

 # List(s) to a Dictionary
 chars = ["a", "b", "c"]
 foos = ["foo", "bar", "baz"]
 foo_dict = dict(zip(chars, foos))
 print(foo_dict)  # {'a': 'foo', 'b': 'bar', 'c': 'baz'}

 print("\n\n---\n\n")

 # Working with JSON
 # Writing to .json file
 jedi = [
    {"name": "Obi-Wan Kenobi", "birth_year": "57BBY", "gender": "male"},
    {"name": "Luke Skywalker", "birth_year": "19BBY", "gender": "male"}
 ]
 with open("jedi.json", "w") as write_file:
    json.dump(jedi, write_file)

 # Reading from .json file
 with open("jedi.json", "r") as read_file:
    data = json.load(read_file)
	"""
	A collection of useful tips when working with Python 3
	"""

	import json
	# from collections import Hashable
	from random import choice, randrange
	# Check if sth is "hashable" cause Sets only store unique and hashable items
	# Whereas Lists can store anything
	# print("Is empty object {} hashable? -> {0:b} ")
	# print(isinstance({}, Hashable))

	primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41,
	43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]

	# Iterate over list with index and value
	for idx, val in enumerate(primes):
	print("At index {idx} is {prime}".format(idx=idx, prime=val))

	print("\n\n---\n\n")

	# Randomly select element from the list
	alphabet = ["a", "b", "c", "d", "e", "f",
	"g", "h", "l", "m", "n", "o", "p", "q"]
	print("The randomly chosen letter is \"{0:s}\"".format(choice(alphabet)))

	# Using ranrange to select random index
	randIndex = randrange(0, len(alphabet))
	print("The randomly chosen letter is \"{0:s}\"".format(alphabet[randIndex]))

	print("\n\n---\n\n")

	# How to transform Lists into other data structures
	# List of strings
	list_of_strings = ["Hey", " ", "there", "!"]
	welcome_message = "".join(list_of_strings)
	print(welcome_message)

	# List of integers
	list_of_integers = [1, 2, 3]
	print("-".join(str(n) for n in list_of_integers))

	print("\n\n---\n\n")

	# List to a Tuple - Tuples are immutable!
	alphabet_tuple = tuple(alphabet)
	print(alphabet_tuple)

	print("\n\n---\n\n")

	# List to a Set - Set can contain only unique, hashable items and there is no order
	my_set = set(["a", "b", "b", "c", "d", "d"])
	print(my_set)
	print("is char \"a\" in set? {0:b}".format("a" in my_set))
	print("is char \"f\" in set? {0:b}".format("f" in my_set))

	print("\n\n---\n\n")

	# List(s) to a Dictionary
	chars = ["a", "b", "c"]
	foos = ["foo", "bar", "baz"]
	foo_dict = dict(zip(chars, foos))
	print(foo_dict) # {'a': 'foo', 'b': 'bar', 'c': 'baz'}

	print("\n\n---\n\n")

	# Working with JSON
	# Writing to .json file
	jedi = [
	{"name": "Obi-Wan Kenobi", "birth_year": "57BBY", "gender": "male"},
	{"name": "Luke Skywalker", "birth_year": "19BBY", "gender": "male"}
	]
	with open("jedi.json", "w") as write_file:
	json.dump(jedi, write_file)

	# Reading from .json file
	with open("jedi.json", "r") as read_file:
	data = json.load(read_file)