diff --git a/bar.txt b/bar.txt new file mode 100644 index 0000000000..ffca7ad9b8 --- /dev/null +++ b/bar.txt @@ -0,0 +1 @@ +duke silveracedogs are the superior race \ No newline at end of file diff --git a/src/00_hello.py b/src/00_hello.py index 268998dfc7..0452931b79 100644 --- a/src/00_hello.py +++ b/src/00_hello.py @@ -1 +1,2 @@ -# Print "Hello, world!" to your terminal \ No newline at end of file +# Print "Hello, world!" to your terminal +print('Hello, world!') \ No newline at end of file diff --git a/src/01_bignum.py b/src/01_bignum.py index c020928d63..6ca26b2ace 100644 --- a/src/01_bignum.py +++ b/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) -# YOUR CODE HERE \ No newline at end of file +# YOUR CODE HERE +print(2**65536) diff --git a/src/02_datatypes.py b/src/02_datatypes.py index 245193da34..216316f64a 100644 --- a/src/02_datatypes.py +++ b/src/02_datatypes.py @@ -14,8 +14,10 @@ # Write a print statement that combines x + y into the integer value 12 # YOUR CODE HERE +print(x + int(y)) # Write a print statement that combines x + y into the string value 57 -# YOUR CODE HERE \ No newline at end of file +# YOUR CODE HERE +print(str(x) + y) diff --git a/src/03_modules.py b/src/03_modules.py index 97eba053c7..a32fd72a36 100644 --- a/src/03_modules.py +++ b/src/03_modules.py @@ -5,27 +5,35 @@ level operating system functionality. """ +import os import sys +import getpass # 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 +for x in range(len(sys.argv)): + print(sys.argv[x]) # Print out the OS platform you're using: # YOUR CODE HERE +print(sys.platform) # Print out the version of Python you're using: # YOUR CODE HERE +print(sys.version) -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 +print(os.getpid()) # Print the current working directory (cwd): # YOUR CODE HERE +print(os.getcwd()) # Print out your machine's login name # YOUR CODE HERE +print(getpass.getuser()) diff --git a/src/04_printing.py b/src/04_printing.py index 06aaa7ff16..e439323f9e 100644 --- a/src/04_printing.py +++ b/src/04_printing.py @@ -11,7 +11,10 @@ # 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!" +print("x is %d, y is %.2f, z is '%s'" % (x, y, z)) # Use the 'format' string method to print the same thing +print("x is {}, y is {:.2f}, z is '{}'".format(x, y, z)) -# Finally, print the same thing using an f-string \ No newline at end of file +# Finally, print the same thing using an f-string +print(f"x is {x}, y is {y:.2f}, z is '{z}'") diff --git a/src/05_lists.py b/src/05_lists.py index cfccc4e945..6781c5e26b 100644 --- a/src/05_lists.py +++ b/src/05_lists.py @@ -8,22 +8,29 @@ # Change x so that it is [1, 2, 3, 4] # YOUR CODE HERE +x.append(4) print(x) # Using y, change x so that it is [1, 2, 3, 4, 8, 9, 10] # YOUR CODE HERE +x.extend(y) print(x) # Change x so that it is [1, 2, 3, 4, 9, 10] # YOUR CODE HERE +x.remove(8) print(x) # Change x so that it is [1, 2, 3, 4, 9, 99, 10] # YOUR CODE HERE +x.insert(5, 99) print(x) # Print the length of list x # YOUR CODE HERE +print(len(x)) # Print all the values in x multiplied by 1000 -# YOUR CODE HERE \ No newline at end of file +# YOUR CODE HERE +for num in x: + print(num*1000) diff --git a/src/06_tuples.py b/src/06_tuples.py index 36754da73b..2c1c7eb747 100644 --- a/src/06_tuples.py +++ b/src/06_tuples.py @@ -17,6 +17,7 @@ import math + def dist(a, b): """Compute the distance between two x,y points.""" x0, y0 = a # Destructuring assignment @@ -24,6 +25,7 @@ def dist(a, b): return math.sqrt((x1 - x0)**2 + (y1 - y0)**2) + a = (2, 7) # <-- x,y coordinates stored in tuples b = (-14, 72) @@ -31,14 +33,17 @@ def dist(a, b): print("Distance is: {:.2f}".format(dist(a, b))) - # Write a function `print_tuple` that prints all the values in a tuple # YOUR CODE HERE +def print_tuple(tuple): + for x in tuple: + print(x) + t = (1, 2, 5, 7, 99) print_tuple(t) # Prints 1 2 5 7 99, one per line # 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) diff --git a/src/07_slices.py b/src/07_slices.py index 5e0b3bd8ee..ac829b06ea 100644 --- a/src/07_slices.py +++ b/src/07_slices.py @@ -12,26 +12,26 @@ a = [2, 4, 1, 7, 9, 6] # Output the second element: 4: -print() +print(a[1:2]) # Output the second-to-last element: 9 -print() +print(a[-2:-1]) # Output the last three elements in the array: [7, 9, 6] -print() +print(a[-3:]) # Output the two middle elements in the array: [1, 7] -print() +print(a[2:-2]) # Output every element except the first one: [4, 1, 7, 9, 6] -print() +print(a[1:]) # Output every element except the last one: [2, 4, 1, 7, 9] -print() +print(a[:-1]) # For string s... s = "Hello, world!" # Output just the 8th-12th characters: "world" -print() \ No newline at end of file +print(s[7:12]) diff --git a/src/08_comprehensions.py b/src/08_comprehensions.py index 67eb742e50..2742fcc8de 100644 --- a/src/08_comprehensions.py +++ b/src/08_comprehensions.py @@ -10,14 +10,14 @@ # Write a list comprehension to produce the array [1, 2, 3, 4, 5] -y = [] +y = [x for x in range(1, 6)] -print (y) +print(y) # Write a list comprehension to produce the cubes of the numbers 0-9: # [0, 1, 8, 27, 64, 125, 216, 343, 512, 729] -y = [] +y = [x**3 for x in range(10)] print(y) @@ -26,7 +26,7 @@ a = ["foo", "bar", "baz"] -y = [] +y = [string.upper() for string in a] print(y) @@ -36,6 +36,6 @@ x = input("Enter comma-separated numbers: ").split(',') # What do you need between the square brackets to make it work? -y = [] +y = [num for num in x if int(num) % 2 == 0] -print(y) \ No newline at end of file +print(y) diff --git a/src/09_dictionaries.py b/src/09_dictionaries.py index a8b2911f64..c556cd7333 100644 --- a/src/09_dictionaries.py +++ b/src/09_dictionaries.py @@ -35,13 +35,26 @@ # Add a new waypoint to the list # YOUR CODE HERE +waypoints.append({ + "lat": 1, + "lon": 2, + "name": "specified location" +}) # 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. +for place in waypoints: + if place["name"] == "a place": + place["name"] = "not a real place" + place["lon"] = -130 + # YOUR CODE HERE # Write a loop that prints out all the field values for all the waypoints -# YOUR CODE HERE \ No newline at end of file +# YOUR CODE HERE + +for place in waypoints: + print(place.items()) diff --git a/src/10_functions.py b/src/10_functions.py index 5830100c2c..b97bfbbb70 100644 --- a/src/10_functions.py +++ b/src/10_functions.py @@ -10,3 +10,12 @@ # YOUR CODE HERE + +def is_even(num): + if num % 2 == 0: + print('Even') + else: + print('Odd') + + +is_even(num) diff --git a/src/11_args.py b/src/11_args.py index 8c467ea47f..856fd03d9d 100644 --- a/src/11_args.py +++ b/src/11_args.py @@ -6,6 +6,10 @@ # YOUR CODE HERE +def f1(x, y): + return x + y + + print(f1(1, 2)) # Write a function f2 that takes any number of integer arguments and returns the @@ -14,6 +18,14 @@ # YOUR CODE HERE + +def f2(*nums): + sum = 0 + for num in nums: + sum += num + return sum + + print(f2(1)) # Should print 1 print(f2(1, 3)) # Should print 4 print(f2(1, 4, -12)) # Should print -7 @@ -22,7 +34,7 @@ a = [7, 6, 5, 4] # How do you have to modify the f2 call below to make this work? -print(f2(a)) # Should print 22 +print(f2(*a)) # Should print 22 # Write a function f3 that accepts either one or two arguments. If one argument, # it returns that value plus 1. If two arguments, it returns the sum of the @@ -31,6 +43,11 @@ # YOUR CODE HERE + +def f3(x, y=1): + return x + y + + print(f3(1, 2)) # Should print 3 print(f3(8)) # Should print 9 @@ -45,6 +62,11 @@ # YOUR CODE HERE +def f4(**kwargs): + for item in kwargs.items(): + print(f'key: {item[0]}, value:{item[1]}') + + # Should print # key: a, value: 12 # key: b, value: 30 @@ -62,4 +84,4 @@ } # How do you have to modify the f4 call below to make this work? -f4(d) +f4(**d) diff --git a/src/12_scopes.py b/src/12_scopes.py index bc467fa423..6547931eec 100644 --- a/src/12_scopes.py +++ b/src/12_scopes.py @@ -4,9 +4,12 @@ # When you use a variable in a function, it's local in scope to the function. x = 12 + def change_x(): + global x x = 99 + change_x() # This prints 12. What do we have to modify in change_x() to get it to print 99? @@ -19,6 +22,7 @@ def outer(): y = 120 def inner(): + nonlocal y y = 999 inner() diff --git a/src/13_file_io.py b/src/13_file_io.py index 3c68f8aba2..65063a05ac 100644 --- a/src/13_file_io.py +++ b/src/13_file_io.py @@ -11,9 +11,21 @@ # YOUR CODE HERE +filename = r'/Users/janascheuble/Desktop/Lambda/CS/week1/Intro-Python-I/src/foo.txt' +files = open(filename) +for line in files: + print(line) +files.close() + # Open up a file called "bar.txt" (which doesn't exist yet) for # writing. Write three lines of arbitrary content to that file, # then close the file. Open up "bar.txt" and inspect it to make # sure that it contains what you expect it to contain -# YOUR CODE HERE \ No newline at end of file +# YOUR CODE HERE + +file = open("bar.txt", "w") +content = ["duke silver", "ace", "dogs are the superior race"] +for string in content: + file.writelines(string) +file.close() diff --git a/src/14_cal.py b/src/14_cal.py index 30bb10d113..1b3b061d38 100644 --- a/src/14_cal.py +++ b/src/14_cal.py @@ -29,4 +29,13 @@ import sys import calendar -from datetime import datetime \ No newline at end of file +from datetime import datetime + +date = datetime.today() + +if (len(sys.argv) == 1): + print(calendar.month(int(date.year), int(date.month))) +elif (len(sys.argv) == 2): + print(calendar.month(int(date.year), int(sys.argv[1]))) +elif (len(sys.argv) == 3): + print(calendar.month(int(sys.argv[2]), int(sys.argv[1]))) diff --git a/src/15_classes.py b/src/15_classes.py index 2355dd20b7..6428846aea 100644 --- a/src/15_classes.py +++ b/src/15_classes.py @@ -3,25 +3,54 @@ # YOUR CODE HERE +class LatLon: + def __init__(self, lat, lon): # initializer + self.lat = lat + self.lon = lon + # Make a class Waypoint that can be passed parameters `name`, `lat`, and `lon` to the # constructor. It should inherit from LatLon. Look up the `super` method. # YOUR CODE HERE + +class Waypoint(LatLon): + def __init__(self, lat, lon, name): + super().__init__(lat, lon) # super allows inheritance + self.name = name + + def __str__(self): # string representation of object + return '{self.name} at {self.lat},{self.lon}'.format(self=self) + # Make a class Geocache that can be passed parameters `name`, `difficulty`, # `size`, `lat`, and `lon` to the constructor. What should it inherit from? # YOUR CODE HERE + +class Geocache(Waypoint): + def __init__(self, lat, lon, name, difficulty, size): # initializer + super().__init__(lat, lon, name) # inheritance + self.difficulty = difficulty + self.size = size + + def __str__(self): + return '{self.name} at {self.lat}, {self.lon}, difficulty level: {self.difficulty}, size: {self.size}'.format(self=self) + + # Make a new waypoint and print it out: "Catacombs", 41.70505, -121.51521 # YOUR CODE HERE +waypoint = Waypoint(41.70505, -121.51521, "Catacombs") + # Without changing the following line, how can you make it print into something # more human-readable? Hint: Look up the `object.__str__` method + print(waypoint) # Make a new geocache "Newberry Views", diff 1.5, size 2, 44.052137, -121.41556 +geocache = Geocache(44.052137, -121.41556, "Newberry Views", 1.5, 2) # YOUR CODE HERE