solutions to python assignments

Author: error-driven-dev

coin_tosses.py

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+"""Write a function that simulates tossing a coin 5,000 times. 
+Your function should print how many times the head/tail appears."""
+import random
+def coin_toss(tosses):
+    heads = 0
+    tails = 0
+    for toss in range(tosses):
+        num = random.random()
+        if num < .5:
+            heads += 1
+            outcome = "heads"
+        elif num >= .5:
+            tails += 1
+            outcome = "tails"
+        print "Attempt #:",toss,"You flipped", outcome, "Total heads =",heads, " Total tails: ", tails
+        
+coin_toss(50)
+
+            
+    

comparing_lists.py

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+# Write a program that compares two lists and prints a 
+# message depending on if the inputs are identical or not.
+
+# Your program should be able to accept and compare two lists: 
+# list_one and list_two. If both lists are identical print 
+# "The lists are the same". If they are not identical print 
+# "The lists are not the same." Try the following test cases for 
+# lists one and two:
+    
+def comp_lists(list_one, list_two):
+    if list_one == list_two:
+        print "The lists are the same."
+    else:
+        print "The lists are not the same."
+  
+# list_one = [1,2,5,6,2]
+# list_two = [1,2,5,6,2]
+
+# list_one = [1,2,5,6,5]
+# list_two = [1,2,5,6,5,3]
+
+# list_one = [1,2,5,6,5,16]
+# list_two = [1,2,5,6,5]
+
+list_one = ['celery','carrots','bread','milk']
+list_two = ['celery','milk','bread','carrots']     
+
+comp_lists(list_one, list_two)

dict_basics.py

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+"""Create a dictionary containing some information about yourself. 
+The keys should include name, age, country of birth, favorite 
+language.
+
+Write a function that will print something like the following as 
+it executes:
+
+My name is Anna
+My age is 101
+My country of birth is The United States
+My favorite language is Python
+Copy
+There are two steps to this process, building a dictionary and 
+then gathering all the data from it. Write a function that can 
+take in and print out any dictionary keys and values.
+
+Note: The majority of data we will manipulate as web developers 
+will be hashed in a dictionary using key-value pairs. Repeat this
+assignment a few times to really get the hang of unpacking 
+dictionaries, 
+as it's a very common requirement of any web application."""
+
+person1 = {
+    "first_name": "Beth",
+    "last_name": "Hart",
+    "age": "old",
+    "country": "United States",
+    "language": "Python"
+    }
+    
+def about_person(person):
+    print "My name is " + person["first_name"]
+    print "My age is " + person["age"]
+    print "I was born in " + person["country"]
+    print "My favorite language is " + person["language"]
+    
+about_person(person1)

filter_by_type.py

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+# Integer
+# If the integer is greater than or equal to 100, print "That's a big number!" If the integer is less than 100, print "That's a small number"
+
+# String
+# If the string is greater than or equal to 50 characters print "Long sentence." If the string is shorter than 50 characters print "Short sentence."
+
+# List
+# If the length of the list is greater than or equal to 10 print "Big list!" If the list has fewer than 10 values print "Short list."
+
+def filter_type(el):
+    if isinstance(el, int):
+        print str(el), "is a number"
+        if el >= 100:
+            print "that's a big number"
+        else:
+            print "that's a small number"
+        
+    if isinstance(el, str):
+        print str(el), "is a string"
+        if len(el) >= 50:
+            print "long sentence"
+        else:
+            print "short sentence"
+    if isinstance(el, list):
+        print str(el), "is a list"
+        if len(el) >= 10:
+            print "that's a long list"
+        else:
+            print "that's a short list"
+            
+filter_type(45)
+filter_type(100)
+filter_type(455)
+filter_type(0)
+filter_type(-23)
+filter_type("Rubber baby buggy bumpers")
+filter_type("Experience is simply the name we give our mistakes")
+filter_type("Tell me and I forget. Teach me and I remember. Involve me and I learn.")
+filter_type("")
+filter_type([1,7,4,21])
+filter_type([3,5,7,34,3,2,113,65,8,89])
+filter_type([4,34,22,68,9,13,3,5,7,9,2,12,45,923])
+filter_type([])
+filter_type(['name','address','phone number','social security number'])

finding_chars.py

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+# Write a program that takes a list of strings 
+# and a string containing a single character, and 
+# prints a new list of all the strings containing 
+# that character.
+
+def find_char_words(char, list): 
+    char_words = []
+    for word in list:
+        if char in word:
+            char_words.append(word)
+    print char_words
+        
+        
+word_list = ['hello','world','my','name','is','Anna']
+char = 'o'
+find_char_words(char, word_list)

fun_w_functions.py

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+#Create a function called odd_even that counts from 1 
+# to 2000. As your loop executes have your program print 
+# the number of that iteration and specify whether it's 
+# an odd or even number.
+# def odd_even(min, max):
+#     iteration = 1
+#     for i in range (min, max+1):
+#         if i %2 ==0:
+#             num = "even"
+#         else:
+#             num = "odd"
+#         print "Number is " + str(iteration) + ". The number is " + num + "."
+#         iteration += 1
+# odd_even(1, 2000)
+
+"""Create a function called 'multiply' that iterates through each
+value in a list (e.g. a = [2, 4, 10, 16]) and returns a list 
+where each value has been multiplied by 5.
+The function should multiply each value in the list by the 
+second argument."""
+
+def multiply (list, multiple):
+    multiplied = []
+    for i in list:
+        multiplied.append(i*multiple)
+    return multiplied
+
+a = [2, 4, 5]
+print multiply(a, 2)
+
+'''Write a function that takes the multiply function call as an
+argument. Your new function should return the multiplied list as
+a two-dimensional list. Each internal list should contain the 1's
+times the number in the original list.'''
+
+def layered_multiples(list, multiple):
+    layered_list = []
+    for i in list:
+        inner_list = []
+        for j in range(i*multiple):
+            inner_list.append(1)
+        layered_list.append(inner_list)
+    return layered_list
+    
+print layered_multiples(multiply(a,2),3)
+        

mult_sums_avgs.py

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+
+#print odd from 1-1000
+for i in range(1, 1001, 2):
+    print i
+    
+#multiples of 5 to 1,000,000
+multiple = 1
+result = 1
+while result < 1000000:
+    result = 5*multiple
+    multiple += 1
+    print result
+
+# sum list
+a = [1, 2, 5, 10, 255, 3]
+sum = 0
+for i in a:
+    sum += i
+print sum
+
+#print avg
+sum = 0
+for i in a:
+    sum += i
+avg = sum/len(a)
+print avg
+    
+    

multi_tbl.py

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+def create_multi_table(low, high):
+    print "%3s" % "x", #uses min 3 spaces in % placeholder, then subs value after % into string
+    for i in range(low,high+1):
+        print "%3s" % i,
+    count = low
+    
+    while count < (high + low):
+        print "\n%3s" % str(count),
+        for i in range(low,high+1):
+            print "%3s" % str(count*i),
+        count += 1
+ 
+create_multi_table(1,12) 
+    

names.py

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+'''Given the following list:'''
+
+students = [
+     {'first_name':  'Michael', 'last_name' : 'Jordan'},
+     {'first_name' : 'John', 'last_name' : 'Rosales'},
+     {'first_name' : 'Mark', 'last_name' : 'Guillen'},
+     {'first_name' : 'KB', 'last_name' : 'Tonel'}
+]
+
+'''Create a program that outputs:
+
+Michael Jordan
+John Rosales
+Mark Guillen
+KB Tonel'''
+
+def student_roster(list):
+    for item in list:
+        print item["first_name"] + " " + item["last_name"]
+student_roster(students)
+            
+    
+
+
+'''Part II
+Now, given the following dictionary:'''
+
+users = {
+ 'Students': [
+     {'first_name':  'Michael', 'last_name' : 'Jordan'},
+     {'first_name' : 'John', 'last_name' : 'Rosales'},
+     {'first_name' : 'Mark', 'last_name' : 'Guillen'},
+     {'first_name' : 'KB', 'last_name' : 'Tonel'}
+  ],
+ 'Instructors': [
+     {'first_name' : 'Michael', 'last_name' : 'Choi'},
+     {'first_name' : 'Martin', 'last_name' : 'Puryear'}
+  ]
+ }
+'''Create a program that prints the following format (including number of characters in each combined name):
+Students
+1 - MICHAEL JORDAN - 13
+2 - JOHN ROSALES - 11
+3 - MARK GUILLEN - 11
+4 - KB TONEL - 7
+Instructors
+1 - MICHAEL CHOI - 11
+2 - MARTIN PURYEAR - 13'''
+
+def students_formatted(dict):
+    num = 1
+    for key in dict:
+        print key
+        for value in dict[key]:
+            full_cap_name = str.upper(value["first_name"]+ " " + value["last_name"])
+            num_chars = len(value["first_name"] + value["last_name"])
+            print str(num) + " - " + full_cap_name + " - " + str(num_chars)
+            num += 1
+
+students_formatted(users)