Assignment 1 - Learn Python the Hard Way
Please find the solution codes for 1-17 from Learn Python the Hard way.
In [1]:
#exercises for learning Python
In [3]:
#exercise 1
print("Hello World!")
print ("Hello Again")
print ("I like typing this.")
print ("This is fun.")
print ('Yay! Printing.')
print ("I'd much rather you 'not'.")
print ('I "said" do not touch this.')
In [11]:
# exerxise 2
# A comment, this is so you can read your program later.
# Anything after the # is ignored by python.
print ("I could have code like this.") # and the comment after is ignored
# You can also use a comment to "disable" or comment out a piece of code:
# print "This won't run."
print ("This will run.")
In [12]:
# exerise 3
print ("I will now count my chickens:")
print ("Hens", 25 + 30 / 6)
print ("Roosters", 100 - 25 * 3 % 4)
print ("Now I will count the eggs:")
print (3 + 2 + 1 - 5 + 4 % 2 - 1 / 4 + 6)
print ("Is it true that 3 + 2 < 5 - 7?")
print (3 + 2 < 5 - 7)
print ("What is 3 + 2?", 3 + 2)
print ("What is 5 - 7?", 5 - 7)
print ("Oh, that's why it's False.")
print ("How about some more.")
print ("Is it greater?", 5 > -2)
print ("Is it greater or equal?", 5 >= -2)
print ("Is it less or equal?", 5 <= -2)
In [17]:
#exercise 4
cars = 100
space_in_a_car = 4.0
drivers=30
passengers=90
cars_not_driven=cars-drivers
cars_driven=drivers
carpool_capacity=cars_driven*space_in_a_car
average_passengers_per_car=passengers/cars_driven
print("There are",cars,"cars available.")
print ("There are only", drivers, "drivers available.")
print ("There will be", cars_not_driven, "empty cars today.")
print ("We can transport", carpool_capacity, "people today.")
print ("We have", passengers, "to carpool today.")
print ("We need to put about", average_passengers_per_car, "in each car.")
In [47]:
#exercise 5
my_name='Z A. Shaw'
my_age=35 #not a lie
my_height=74 #inches
my_weight=180 #lbs
my_eyes='Blue'
my_teeth='White'
my_hair='Brown'
print("Lets talk about %s" %my_name)
print("He's",my_height,"inches tall")
print("He's %d inches tall" %my_height)
print("He's %d inches tall" %74)
print("He's %d pounds heavy" %my_weight)
print("Actually thats not heavy")
print("He has %s eyes and %s teeth" %(my_eyes,my_teeth))
print ("His teeth are usually %s depending on the coffee." % my_teeth)
print ("If I add %d, %d, and %d I get %d." % (
my_age, my_height, my_weight, my_age + my_height + my_weight))
In [52]:
#exercise 6
#strings and text
x="There are %d types of people" %10
binary="binary"
do_not="don't"
y="Those who know %s and those who %s" %(binary,do_not)
print(x)
print(y)
print("I said:%r"%x)
print("I also said: '%s'" %y)
hilarious=False
joke_evaluation = "Isn't that joke so funny?! %r"
print (joke_evaluation % hilarious)
w = "This is the left side of..."
e = "a string with a right side."
print (w + e)
In [56]:
#exercise 7
print("Mary had a little lamb")
print("Its fleece was white as %s" %'snow')
print("And everywhere that Mary went.")
print("."*10)
end1 = "C"
end2 = "h"
end3 = "e"
end4 = "e"
end5 = "s"
end6 = "e"
end7 = "B"
end8 = "u"
end9 = "r"
end10 = "g"
end11 = "e"
end12 = "r"
print (end1 + end2 + end3 + end4 + end5 + end6)
print (end7 + end8 + end9 + end10 + end11 + end12)
In [60]:
#exercise 8
formatter="%r %r %r %r"
print (formatter % (1, 2, 3, 4))
print (formatter % ("one", "two", "three", "four"))
print (formatter % (True, False, False, True))
print (formatter % (formatter, formatter, formatter, formatter))
print (formatter % (
"I had this thing.",
"That you could type up right.",
"But it didn't sing.",
"So I said goodnight."
))
In [58]:
#exercise 9
days = "Mon Tue Wed Thu Fri Sat Sun"
months = "Jan\nFeb\nMar\nApr\nMay\nJun\nJul\nAug"
print ("Here are the days: ", days)
print ("Here are the months: ", months)
#three quotes used to print in different lines
print ("""
There's something going on here.
With the three double-quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5, or 6.
""")
In [69]:
#exercise 10
tabby_cat = "\tI'm tabbed in."
persian_cat = "I'm split\non a line."
backslash_cat = "I'm \\ a \\ cat."
fat_cat = """
I'll do a list:
\t* Cat food
\t* Fishies
\t* Catnip\n\t* Grass
"""
print (tabby_cat)
print (persian_cat)
print (backslash_cat)
print (fat_cat)
print("I am 6'2\" tall.") #to override the " inside the statement
In [74]:
#exercise 11
print ("How old are you?")
age = input()
print ("How tall are you?")
height = input()
print ("How much do you weigh?")
weight = input()
print ("So, you're %r old, %r tall and %r heavy." % (age, height, weight))
In [1]:
#exercise 12
age = input("How old are you? ")
height = input("How tall are you? ")
weight = input("How much do you weigh? ")
print ("So, you're %r old, %r tall and %r heavy." %(age, height, weight))
In [5]:
#exercise 14
from sys import argv
prompt='>'
script=argv
user_name='Prarthana'
print ("Hi %s, I'm the %s script." % (user_name, script))
print ("I'd like to ask you a few questions.")
print ("Do you like me %s?" % user_name)
likes = input(prompt)
print ("Where do you live %s?" % user_name)
lives = input(prompt)
print ("What kind of computer do you have?")
computer = input(prompt)
print ("""
Alright, so you said %r about liking me.
You live in %r. Not sure where that is.
And you have a %r computer. Nice.
""" % (likes, lives, computer))
In [2]:
#exercise 16
filename = "junk.txt"
print ("We're going to erase", filename)
print ("If you don't want that, hit CTRL-C (^C).")
print ("If you do want that, hit RETURN.")
input("?")
print ("Opening the file...")
target = open(filename, 'w')
print ("Truncating the file. Goodbye!")
target.truncate()
print ("Now I'm going to ask you for three lines.")
line1 = input("line 1: ")
line2 = input("line 2: ")
line3 = input("line 3: ")
print ("I'm going to write these to the file.")
target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")
print ("And finally, we close it.")
target.close()
readfile = open(filename)
print ("Contents of your file ", filename)
print (readfile.read())
In [4]:
#exercise 15
filename = "junk.txt"
txt = open(filename)
print ("Contents of your file ", filename)
print (txt.read())
print ("Type the filename again:")
file_again = input("file? ")
txt_again = open(file_again)
print (txt_again.read())
very much usefull !!
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