Class 16 — Wednesday March 10

CSV Chrestomathics and logical values and decision

May the light of peace — For you and your families — Always shine brightly

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Look both ways

• Back and ahead

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Riddle me this — what classrooms are viable for scheduling CS 1112

• The School of Engineering and Applied Science (SEAS) has four-tiered classrooms: MEC 205, Olsson Hall 120, Rice 130, and Thornton E316. All four rooms provide WIFI access. Only MEC 205, Olsson Hall 120, and Rice 130 support classroom sizes greater than 100. MEC 205 and Olsson 120 do not provide student power ports.

• The registrar has rules about scheduling 75-minute classes. They can meet anytime on Tuesdays or Thursdays. On Mondays, Wednesdays, or Fridays they cannot be scheduled before 2:00 PM.

• Surveys indicate that on average, students preferred classes whose starting times do not occur before 10:00 AM or after 2:00 PM.

• Tiered seating allows for a better eye contact between an instructor and other members of the class. Better eye contact encourages student engagement.

• Jim Cohoon has several general teaching preferences.

• Maximize student access to his courses.

• Class sessions be 75-minutes.

• 1xxx and 2xxx level courses meet three times a week.

• 3xxx and 4xxx courses meet twice a week.

• Classrooms should provide student access to WIFI and to power ports.

• Maximize student engagement.

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Agenda

• Being logical

• if statement exposure

• CSV chrestomathics

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Transitioning

• Some problem solving requires the ability to react — depending upon the circumstances different conditions need actions to be performed. Python provides the if statement for decision making.

• The if statement uses logical test expressions to determine which action to perform. There are variants of the if statement to make decisions based on one, two, or several possibilities.

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Downloads

• Program csv_is_not_a_pharmacy.py

• Program logical_operators.py

• Program can_you_relate.py

• Program acid_test.py

• Program what_color_will_my_chrysanthemums_be.py

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To do

• Homework

• Review artifacts

• Read epistle on decision making

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Program can_you_relate.py

• Introduces the comparison operators

Three program runs

Enter number: 12

Enter number: 11

12 < 11 : False

12 > 11 : True

12 <= 11 : False

12 >= 11 : True

12 == 11 : False

12 != 11 : True

Enter number: 3

Enter number: 14

3 < 14 : True

3 > 14 : False

3 <= 14 : True

3 >= 14 : False

3 == 14 : False

3 != 14 : True

Enter number: 7

Enter number: 7

7 < 7 : False

7 > 7 : False

7 <= 7 : True

7 >= 7 : True

7 == 7 : True

7 != 7 : False

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Program logical_operators.py

• Introduces the logical operators

Program run

##### Logical values (bool)

True

False

##### Logical and

True and True = True

True and False = False

False and True = False

False and False = False

##### Logical or

True or True = True

True or False = True

False or True = True

False or False = False

##### Logical negation

not True = False

not False = True

##### Logical includes

1 in [3, 1, 4, 1, 5] = True

2 in [3, 1, 4, 1, 5] = False

##### Logical exclusion

1 not in [3, 1, 4, 1, 5] = False

2 not in [3, 1, 4, 1, 5] = True

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Program acid_test.py

• Determine whether its input pH level is acidic; i.e., less than 7.0

Three program runs

Enter pH level: 6.5

True

Enter pH level: 7.0

False

Enter pH level: 7.5

False

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Some datasets

• elevations.csv

Location, Author, Max Height, Min Height

Narnia, Lewis, 4810, -10

Neverland, Milne, 426, -2

Oz, Baum, 1231, 679

Sleepy Hollow, Irving, 1629, 304

Stars Hollow, Sherman-Palladino, 725, 152

Toyland, MacDonough, 6187, 0

Wonderland, Carroll, 5895, -5

• oceania.csv

Country, Females, Males

Australia, 11175724, 11092660

Fiji, 421365, 439258

French Polynesia, 132082, 138682

New Caledonia, 125322, 125548

New Zealand, 2223281, 2144855

Papua New Guinea, 3359979, 3498287

Solomon Islands, 259909, 278239

Vanuatu, 117573, 122078

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Program csv_is_not_a_pharmacy.py — streamlining getting a dataset

• Makes use of module url.py to process acquire datasets

• Some program runs

Enter name of dataset: oceania.csv

dataset:

Country, Females, Males

Australia, 11175724, 11092660

Fiji, 421365, 439258

French Polynesia, 132082, 138682

New Caledonia, 125322, 125548

New Zealand, 2223281, 2144855

Papua New Guinea, 3359979, 3498287

Solomon Islands, 259909, 278239

Vanuatu, 117573, 122078

header:

['Country', 'Females', 'Males']

data:

['Country', 'Females', 'Males']

['Australia', 11175724, 11092660]

['Fiji', 421365, 439258]

['French Polynesia', 132082, 138682]

['New Caledonia', 125322, 125548]

['New Zealand', 2223281, 2144855]

['Papua New Guinea', 3359979, 3498287]

['Solomon Islands', 259909, 278239]

['Vanuatu', 117573, 122078]

Enter name of dataset: elevations.csv

dataset:

Location, Author, Max Height, Min Height

Narnia, Lewis, 4810, -10

Neverland, Milne, 426, -2

Oz, Baum, 1231, 679

Sleepy Hollow, Irving, 1629, 304

Stars Hollow, Sherman-Palladino, 725, 152

Toyland, MacDonough, 6187, 0

Wonderland, Carroll, 5895, -5

header:

['Location', 'Author', 'Max Height', 'Min Height']

data:

['Narnia', 'Lewis', 4810, -10]

['Neverland', 'Milne', 426, -2]

['Oz', 'Baum', 1231, 679]

['Sleepy Hollow', 'Irving', 1629, 304]

['Stars Hollow', 'Sherman-Palladino', 725, 152]

['Toyland', 'MacDonough', 6187, 0]

['Wonderland', 'Carroll', 5895, -5]

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Where am I

 

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🦆 © 2022 Jim Cohoon

Resources from previous semesters are available.