Python Sprint

src/cityreader/cityreader.py

@@ -1,11 +1,23 @@
+import csv
+
 # Create a class to hold a city location. Call the class "City". It should have
 # fields for name, lat and lon (representing latitude and longitude).
 
 
+class City():
+    def __init__(self, name, lat, lon):
+        self.name = name
+        self.lat = lat
+        self.lon = lon
+
+    def __repr__(self):
+        return f"City({self.name}, {self.lat}, {self.lon})"
+
+
 # We have a collection of US cities with population over 750,000 stored in the
 # file "cities.csv". (CSV stands for "comma-separated values".)
 #
-# In the body of the `cityreader` function, use Python's built-in "csv" module 
+# In the body of the `cityreader` function, use Python's built-in "csv" module
 # to read this file so that each record is imported into a City instance. Then
 # return the list with all the City instances from the function.
 # Google "python 3 csv" for references and use your Google-fu for other examples.
@@ -16,26 +28,34 @@
 # should not be loaded into a City object.
 cities = []
 
+
 def cityreader(cities=[]):
-  # TODO Implement the functionality to read from the 'cities.csv' file
-  # For each city record, create a new City instance and add it to the 
-  # `cities` list
-
+    # TODO Implement the functionality to read from the 'cities.csv' file
+    # For each city record, create a new City instance and add it to the
+    # `cities` list
+    with open('cities.csv', 'r') as file:
+        csv_file = csv.DictReader(file)
+
+        for row in csv_file:
+            cities.append(City(row['city'], float(
+                row['lat']), float(row['lng'])))
+
     return cities
 
+
 cityreader(cities)
 
 # Print the list of cities (name, lat, lon), 1 record per line.
 for c in cities:
-    print(c)
+    print(f"{c.name}, {c.lat}, {c.lon}")
 
 # STRETCH GOAL!
 #
 # Allow the user to input two points, each specified by latitude and longitude.
-# These points form the corners of a lat/lon square. Pass these latitude and 
+# These points form the corners of a lat/lon square. Pass these latitude and
 # longitude values as parameters to the `cityreader_stretch` function, along
 # with the `cities` list that holds all the City instances from the `cityreader`
-# function. This function should output all the cities that fall within the 
+# function. This function should output all the cities that fall within the
 # coordinate square.
 #
 # Be aware that the user could specify either a lower-left/upper-right pair of
@@ -60,12 +80,13 @@ def cityreader(cities=[]):
 
 # TODO Get latitude and longitude values from the user
 
+
 def cityreader_stretch(lat1, lon1, lat2, lon2, cities=[]):
-  # within will hold the cities that fall within the specified region
-  within = []
+    # within will hold the cities that fall within the specified region
+    within = []
 
-  # TODO Ensure that the lat and lon valuse are all floats
-  # Go through each city and check to see if it falls within 
-  # the specified coordinates.
+    # TODO Ensure that the lat and lon valuse are all floats
+    # Go through each city and check to see if it falls within
+    # the specified coordinates.
 
-  return within
+    return within

src/comp/comp.py

@@ -1,5 +1,8 @@
-# The following list comprehension exercises will make use of the 
-# defined Human class. 
+# The following list comprehension exercises will make use of the
+# defined Human class.
+import math
+
+
 class Human:
     def __init__(self, name, age):
         self.name = name
@@ -8,6 +11,7 @@ def __init__(self, name, age):
     def __repr__(self):
         return f"<Human: {self.name}, {self.age}>"
 
+
 humans = [
     Human("Alice", 29),
     Human("Bob", 32),
@@ -24,48 +28,48 @@ def __repr__(self):
 # Write a list comprehension that creates a list of names of everyone
 # whose name starts with 'D':
 print("Starts with D:")
-a = []
+a = [human.name for human in humans if human.name[0] == 'D']
 print(a)
 
 # Write a list comprehension that creates a list of names of everyone
 # whose name ends in "e".
 print("Ends with e:")
-b = []
+b = [human.name for human in humans if human.name[-1] == 'e']
 print(b)
 
 # Write a list comprehension that creates a list of names of everyone
 # whose name starts with any letter between 'C' and 'G' inclusive.
 print("Starts between C and G, inclusive:")
-c = []
+c = [human.name for human in humans if human.name[0] >= "C" and human.name[0] <= "G"]
 print(c)
 
 # Write a list comprehension that creates a list of all the ages plus 10.
 print("Ages plus 10:")
-d = []
+d = [human.age + 10 for human in humans]
 print(d)
 
 # Write a list comprehension that creates a list of strings which are the name
 # joined to the age with a hyphen, for example "David-31", for all humans.
 print("Name hyphen age:")
-e = []
+e = [f"{human.name}-{human.age}" for human in humans]
 print(e)
 
 # Write a list comprehension that creates a list of tuples containing name and
 # age, for example ("David", 31), for everyone between the ages of 27 and 32,
 # inclusive.
 print("Names and ages between 27 and 32:")
-f = []
+f = [(human.name, human.age)
+     for human in humans if human.age > 27 and human.age <= 32]
 print(f)
 
 # Write a list comprehension that creates a list of new Humans like the old
 # list, except with all the names uppercase and the ages with 5 added to them.
 # The "humans" list should be unmodified.
 print("All names uppercase:")
-g = []
+g = [Human(human.name.upper(), human.age + 5) for human in humans]
 print(g)
 
 # Write a list comprehension that contains the square root of all the ages.
 print("Square root of ages:")
-import math
-h = []
+h = [math.sqrt(human.age) for human in humans]
 print(h)

src/oop/oop1.py

@@ -17,3 +17,24 @@
 #     pass
 #
 # Put a comment noting which class is the base class
+
+class Vehicle:
+  pass
+
+class GroundVehicle(Vehicle):
+  pass
+
+class Car(GroundVehicle):
+  pass
+
+class Motorcycle(GroundVehicle):
+  pass
+
+class FlightVehicle(Vehicle):
+  pass
+
+class Airplane(FlightVehicle):
+  pass
+
+class Starship(FlightVehicle):
+  pass

src/oop/oop2.py

@@ -4,10 +4,12 @@
 # object is constructed.
 
 class GroundVehicle():
-    def __init__(self, num_wheels):
+    def __init__(self, num_wheels = 4):
         self.num_wheels = num_wheels
 
     # TODO
+    def drive(self):
+        return "vroooom"
 
 
 # Subclass Motorcycle from GroundVehicle.
@@ -18,6 +20,14 @@ def __init__(self, num_wheels):
 # Override the drive() method in Motorcycle so that it returns "BRAAAP!!"
 
 # TODO
+class Motorcycle(GroundVehicle):
+    def __init__(self, num_wheels = 2):
+        super().__init__(num_wheels)
+
+    # TODO
+    def drive(self):
+        return "BRAAAP!!"
+
 
 vehicles = [
     GroundVehicle(),
@@ -30,3 +40,5 @@ def __init__(self, num_wheels):
 # Go through the vehicles list and print the result of calling drive() on each.
 
 # TODO
+for val in vehicles:
+    print(val.drive())