Exercise solutions

Python_Exercises.py

@@ -6,9 +6,9 @@
 
 def power(a,b):
 
-    # ** What is 7 to the power of 4?**
+    # ** What is 7 to the power of 4?
 
-    return None
+    return a**b
 
 
 
@@ -19,50 +19,52 @@ def split_str(s):
 #     s = "Hi there Sam!"
 #     
 # **into a list. **
-
-    return None
+       
+      return s.split()
 
 
 def format(planet,diameter):
 
 # ** Given the variables:**
 # 
-#     planet = "Earth"
-#     diameter = 12742
+     planet = "Earth"
+     diameter = 12742
 # 
 # ** Use .format() to print the following string: **
 # 
-#     The diameter of Earth is 12742 kilometers.
+#     print("The diameter of {} is {} kilometers.".format(planet,diameter))
 
-    return None
+     return "The diameter of {} is {} kilometers.".format(planet,diameter)
 
 
 
 def indexing(lst):
 
 # ** Given this nested list, use indexing to grab the word "hello" **
 
-#lst = [1,2,[3,4],[5,[100,200,['hello']],23,11],1,7]
+#    lst = [1,2,[3,4],[5,[100,200,['hello']],23,11],1,7]
+#    print(lst[3][1][2][0])
 
-    return None
+    return lst[3][1][2][0]
 
 
 def dictionary(d):
 
 # ** Given this nested dictionary grab the word "hello". Be prepared, this will be annoying/tricky **
 
-# d = {'k1':[1,2,3,{'tricky':['oh','man','inception',{'target':[1,2,3,'hello']}]}]}
+  # d = {'k1':[1,2,3,{'tricky':['oh','man','inception',{'target':[1,2,3,'hello']}]}]}
+  # print(d['k1'][3]['tricky'][3]['target'][3])
 
 
-    return None
+    return d['k1'][3]['tricky'][3]['target'][3]
 
 
 def subjective():
 
 # ** What is the main difference between a tuple and a list? **
-# Tuple is _______
+#    print("Tuple is immutable")
 
-    return None
+    return "immutable"
 
 
 
@@ -74,36 +76,42 @@ def domainGet(email):
 #     [email protected]
 #     
 # **So for example, passing "[email protected]" would return: domain.com**
-
-    return None
+    
+    return email.split('@')[1]
 
 
 def findDog(st):
 
 # ** Create a basic function that returns True if the word 'dog' is contained in the input string. Don't worry about edge cases like a punctuation being attached to the word dog, but do account for capitalization. **
-
-    return None
+    t=st.split()
+    return 'dog' in t
 
 
 def countDog(st):
 
 # ** Create a function that counts the number of times the word "dog" occurs in a string. Again ignore edge cases. **
-
-    return None
+    t=st.split()
+    count=0
+    for item in t:
+        if item=='dog':
+          count=count+1
+    return count
 
 
 
 def lambdafunc(seq):
 
     # ** Use lambda expressions and the filter() function to filter out words from a list that don't start with the letter 's'. For example:**
 # 
-#     seq = ['soup','dog','salad','cat','great']
+#     seq = ['soup','dog','salad','cat','great'] 
 # 
 # **should be filtered down to:**
 # 
 #     ['soup','salad']
 
-    return None
+      t=list(filter(lambda item: 's' in item, seq))
+
+      return t
 
 
 def caught_speeding(speed, is_birthday):
@@ -114,8 +122,23 @@ def caught_speeding(speed, is_birthday):
 #   If your speed is 60 or less, the result is "No Ticket". If speed is between 61 
 #   and 80 inclusive, the result is "Small Ticket". If speed is 81 or more, the result is "Big    Ticket". Unless it is your birthday (encoded as a boolean value in the parameters of the function) -- on your birthday, your speed can be 5 higher in all 
 #   cases. **
+    if is_birthday==True:
+      if speed<=65:
+        return "No Ticket"
+      elif speed<=85:
+        return "Small Ticket"
+      else:
+        return "Big Ticket"
+    else:
+      if speed<=60:
+        return "No Ticket"
+      elif speed<=80:
+        return "Small Ticket"
+      else:
+        return "Big Ticket"
 
-    return None
+
+
 
 
 ## Numpy Exercises
@@ -126,50 +149,57 @@ def caught_speeding(speed, is_birthday):
 def create_arr_of_fives():
 
   #### Create an array of 10 fives
+    l=np.full((10,1),5)
   #### Convert your output into list 
   #### e.g return list(arr) 
 
-  return None
+    return list(l)
 
 
 
 def even_num():
 
   ### Create an array of all the even integers from 10 to 50
+  l=np.arange(10,51,2)
   ### Convert your output into list 
   ### e.g return list(arr) 
 
-  return None
+  return list(l)
 
 
 
 def create_matrix():
 
   ### Create a 3x3 matrix with values ranging from 0 to 8
+    t=np.arange(0,8+1)
+    l=t.reshape(3,3)
   ### Convert your output into list 
   ### e.g return (arr).tolist()
 
-  return None
+    return l.tolist()
 
 
 
 def linear_space():
 
   ### Create an array of 20 linearly spaced points between 0 and 1
+  l=np.linspace(0,1,20)
   ### Convert your output into list 
   ### e.g return list(arr) 
 
-  return None
+  return list(l)
 
 
 
 def decimal_mat():
 
   ### Create an array of size 10*10 consisting of numbers from 0.01 to 1
+    l=np.linspace(0.01,1,100).reshape(10,10)
+    x=np.round(l,decimals=2)
   ### Convert your output into list 
   ### e.g return (arr).tolist()
 
-  return None
+    return x.tolist()
 
 
 
@@ -190,7 +220,9 @@ def slices_1():
   #      [17, 18, 19, 20],
   #      [22, 23, 24, 25]])
 
-  return None
+  l=arr[2:,1:]
+
+  return l.tolist()
 
 
 
@@ -210,8 +242,9 @@ def slices_2():
   # array([[ 2],
   #      [ 7],
   #      [12]])
+  l=arr[:3,1:2]
 
-  return None 
+  return l.tolist()
 
 
 
@@ -230,8 +263,9 @@ def slices_3():
   ### e.g return (arr).tolist()
   # array([[16, 17, 18, 19, 20],
   #      [21, 22, 23, 24, 25]])
+  t=arr[3:]
 
-  return None 
+  return t.tolist()
 
 
 # Great job!