arturo-obregon-dspt3-intro-python-I

src/00_hello.py

@@ -1 +1,4 @@
-# Print "Hello, world!" to your terminal
+# Print "Hello, world!" to your terminal
+hi = 'Hello, world!'
+
+print(hi)

src/01_bignum.py

@@ -1,4 +1,5 @@
 # Print out 2 to the 65536 power
 # (try doing the same thing in the JS console and see what it outputs)
+big = 2**65536
 
-# YOUR CODE HERE
+print(big)

src/02_datatypes.py

@@ -2,7 +2,6 @@
 Python is a strongly-typed language under the hood, which means
 that the types of values matter, especially when we're trying
 to perform operations on them.
-
 Note that if you try running the following code without making any
 changes, you'll get a TypeError saying you can't perform an operation
 on a string and an integer.
@@ -12,10 +11,11 @@
 y = "7"
 
 # Write a print statement that combines x + y into the integer value 12
-
-# YOUR CODE HERE
+in = x + int(y)
 
 
 # Write a print statement that combines x + y into the string value 57
+st = str(x) + y
 
-# YOUR CODE HERE
+print(in)
+print(st)

src/03_modules.py

@@ -5,27 +5,37 @@
 level operating system functionality.
 """
 
+import os
 import sys
 # See docs for the sys module: https://docs.python.org/3.7/library/sys.html
-
 # Print out the command line arguments in sys.argv, one per line:
-# YOUR CODE HERE
+arguements = [arg for arg in sys.argv]
+for i, arg in enumerate(arguements):
+    print(f'Arguments{i}: {arg}')
+print()
 
 # Print out the OS platform you're using:
-# YOUR CODE HERE
+OS_platform = sys.platform
+print(f'Operating System: {OS_platform}')
+print()
 
 # Print out the version of Python you're using:
-# YOUR CODE HERE
-
+python_version = sys.version
+print(f'Python Version: {python_version}')
+print()
 
-import os
 # See the docs for the OS module: https://docs.python.org/3.7/library/os.html
-
 # Print the current process ID
-# YOUR CODE HERE
+process_ID = os.getpid()
+print(f'Current Process ID: {process_ID}')
+print()
 
 # Print the current working directory (cwd):
-# YOUR CODE HERE
+current_dir = os.getcwd()
+print(f'CWD: {current_dir}')
+print()
 
 # Print out your machine's login name
-# YOUR CODE HERE
+name = os.getlogin()
+print(f'Login Name: {name}')
+print()

src/04_printing.py

@@ -1,17 +1,27 @@
 """
 Python provides a number of ways to perform printing. Research
-how to print using the printf operator, the `format` string 
+how to print using the printf operator, the `format` string
 method, and by using f-strings.
 """
-
 x = 10
 y = 2.24552
 z = "I like turtles!"
 
-# Using the printf operator (%), print the following feeding in the values of x,
+# Using the printf operator (%),
+# print the following feeding in the values of x,
 # y, and z:
 # x is 10, y is 2.25, z is "I like turtles!"
+format_1 = 'x is %d, y is %2.2f, z is "%s"' % (x, y, z)
+print(format_1)
+print()
 
 # Use the 'format' string method to print the same thing
+format_2 = 'x is {}'.format(x)
++ ', y is {:.2f}'.format(y) + ', z is "{}"'.format(z)
+print(format_2)
+print()
 
-# Finally, print the same thing using an f-string
+# Finally, print the same thing using an f-string
+format_3 = f'x is {x}, y is {y:.{2}f}, z is "{z}"'
+print(format_3)
+print()

src/05_lists.py

@@ -1,4 +1,5 @@
-# For the exercise, look up the methods and functions that are available for use
+# For the exercise, look up the methods and
+# functions that are available for use
 # with Python lists.
 
 x = [1, 2, 3]
@@ -7,23 +8,26 @@
 # For the following, DO NOT USE AN ASSIGNMENT (=).
 
 # Change x so that it is [1, 2, 3, 4]
-# YOUR CODE HERE
-print(x)
+x.append(4)
 
 # Using y, change x so that it is [1, 2, 3, 4, 8, 9, 10]
-# YOUR CODE HERE
-print(x)
+x.extend([n for n in y])
 
 # Change x so that it is [1, 2, 3, 4, 9, 10]
-# YOUR CODE HERE
-print(x)
+x.remove(8)
 
 # Change x so that it is [1, 2, 3, 4, 9, 99, 10]
-# YOUR CODE HERE
+x.insert(-1, 99)
 print(x)
+print()
 
 # Print the length of list x
-# YOUR CODE HERE
+length = len(x)
+print(length)
+print()
 
 # Print all the values in x multiplied by 1000
-# YOUR CODE HERE
+# YOUR CODE HERE
+list_comp = [n * 1000 for n in x]
+print(list_comp)
+print()

src/06_tuples.py

@@ -3,11 +3,9 @@
 are usually used to hold heterogenous data, as opposed to lists
 which are typically used to hold homogenous data. Tuples use
 parens instead of square brackets.
-
 More specifically, tuples are faster than lists. If you're looking
 to just define a constant set of values and that set of values
 never needs to be mutated, use a tuple instead of a list.
-
 Additionally, your code will be safer if you opt to "write-protect"
 data that does not need to be changed. Tuples enforce immutability
 automatically.
@@ -17,6 +15,7 @@
 
 import math
 
+
 def dist(a, b):
     """Compute the distance between two x,y points."""
     x0, y0 = a  # Destructuring assignment
@@ -26,19 +25,21 @@ def dist(a, b):
 
 a = (2, 7)   # <-- x,y coordinates stored in tuples
 b = (-14, 72)
-
-# Prints "Distance is 66.94"
 print("Distance is: {:.2f}".format(dist(a, b)))
-
-
+print()
 
 # Write a function `print_tuple` that prints all the values in a tuple
 
-# YOUR CODE HERE
+
+def print_tuple(tup):
+    for i in tup:
+        print(i)
 
 t = (1, 2, 5, 7, 99)
-print_tuple(t)  # Prints 1 2 5 7 99, one per line
+print_tuple(t)
+print()
 
 # Declare a tuple of 1 element then print it
-u = (1)  # What needs to be added to make this work?
+u = (1,)  # What needs to be added to make this work?
 print_tuple(u)
+print()

src/07_slices.py

@@ -1,37 +1,42 @@
 """
-Python exposes a terse and intuitive syntax for performing 
+Python exposes a terse and intuitive syntax for performing
 slicing on lists and strings. This makes it easy to reference
-only a portion of a list or string. 
-
+only a portion of a list or string.
 This Stack Overflow answer provides a brief but thorough
 overview: https://stackoverflow.com/a/509295
-
 Use Python's slice syntax to achieve the following:
 """
 
 a = [2, 4, 1, 7, 9, 6]
 
 # Output the second element: 4:
+print(a[1])
 print()
 
 # Output the second-to-last element: 9
+print(a[-2])
 print()
 
 # Output the last three elements in the array: [7, 9, 6]
+print(a[3:])
 print()
 
 # Output the two middle elements in the array: [1, 7]
+print(a[2:-2])
 print()
 
 # Output every element except the first one: [4, 1, 7, 9, 6]
+print(a[1:])
 print()
 
 # Output every element except the last one: [2, 4, 1, 7, 9]
+print(a[:-1])
 print()
 
 # For string s...
 
 s = "Hello, world!"
 
 # Output just the 8th-12th characters: "world"
-print()
+print(s[7:12])
+print()

src/08_comprehensions.py

@@ -2,40 +2,42 @@
 List comprehensions are one cool and unique feature of Python.
 They essentially act as a terse and concise way of initializing
 and populating a list given some expression that specifies how
-the list should be populated. 
+the list should be populated.
 
-Take a look at https://docs.python.org/3/tutorial/datastructures.html#list-comprehensions
+Take a look at
+https://docs.python.org/3/tutorial/datastructures.html#list-comprehensions
 for more info regarding list comprehensions.
 """
 
 # Write a list comprehension to produce the array [1, 2, 3, 4, 5]
 
-y = []
-
-print (y)
+ar = [n for n in range(1, 6)]
+print(ar)
+print()
 
 # Write a list comprehension to produce the cubes of the numbers 0-9:
 # [0, 1, 8, 27, 64, 125, 216, 343, 512, 729]
 
-y = []
-
-print(y)
+cube= [n ** 3 for n in range(10)]
+print(cube)
+print()
 
 # Write a list comprehension to produce the uppercase version of all the
 # elements in array a. Hint: "foo".upper() is "FOO".
 
 a = ["foo", "bar", "baz"]
 
-y = []
-
-print(y)
+up = [s.upper() for s in a]
+print(up)
+print()
 
 # Use a list comprehension to create a list containing only the _even_ elements
 # the user entered into list x.
 
 x = input("Enter comma-separated numbers: ").split(',')
 
 # What do you need between the square brackets to make it work?
-y = []
 
-print(y)
+ev = [int(n) for n in x if int(n) % 2 == 0]
+print(ev)
+print()

src/09_dictionaries.py

@@ -4,10 +4,8 @@
 you'll find in other languages (though you can also initialize and
 populate dictionaries using comprehensions just like you can with
 lists!).
-
 The docs can be found here:
 https://docs.python.org/3/tutorial/datastructures.html#dictionaries
-
 For this exercise, you have a list of dictionaries. Each dictionary
 has the following keys:
  - lat: a signed integer representing a latitude value
@@ -34,14 +32,25 @@
 ]
 
 # Add a new waypoint to the list
-# YOUR CODE HERE
+waypoints.append(
+    {
+        "lat": 37,
+        "lon": 122,
+        "name": "GGB"
+    }
+)
 
 # Modify the dictionary with name "a place" such that its longitude
 # value is -130 and change its name to "not a real place"
 # Note: It's okay to access the dictionary using bracket notation on the
 # waypoints list.
 
-# YOUR CODE HERE
+waypoints[0]["lon"] = -130
+waypoints[0]["name"] = "not a real place"
 
 # Write a loop that prints out all the field values for all the waypoints
-# YOUR CODE HERE
+
+for dic in waypoints:
+    for key, value in zip(dic.keys(), dic.values()):
+        print(f'{key}: {value}')
+    print()

src/10_functions.py

@@ -1,12 +1,17 @@
-# Write a function is_even that will return true if the passed-in number is even.
+# Write a function is_even that will return
+# true if the passed-in number is even.
 
-# YOUR CODE HERE
+
+def is_even(n):
+    if n % 2 == 0:
+        return True
 
 # Read a number from the keyboard
 num = input("Enter a number: ")
 num = int(num)
 
 # Print out "Even!" if the number is even. Otherwise print "Odd"
-
-# YOUR CODE HERE
-
+if is_even(num):
+    print('Even')
+else:
+    print('Odd')