CS 2000 - Fall 2025.

Announcements

The Yale School of Engineering and the Yale School of Medicine are hosting information sessions for their innovative one-year joint master’s degree in Personalized Medicine & Applied Engineering. Please share the information below to your students, advising programs, and student organizations.

This interdisciplinary program equips students with cutting edge skills at the intersection of medicine, engineering, and computer science. Participants gain hands-on experience designing 3D solutions for personalized healthcare using technologies such as 3D imaging and printing, artificial intelligence and machine learning, robotics and computer-assisted navigation, and augmented and virtual reality (AR/VR). Graduates will be prepared to develop customized medical interventions that enhance patient outcomes and drive innovation in clinical practice.

Who Should Apply:

Pre-med and medical students, biomedical/mechanical/electrical engineering and computer science majors passionate about healthcare innovation Program Highlights:

• Interdisciplinary Courses: Co-taught by faculty from both Yale Engineering and Yale Medicine
• Thesis Projects: Applied research in fields such as orthopedics, cardiovascular medicine, oncology, tissue engineering, sports medicine, radiation oncology, and machine learning
• Clinical Immersion: Shadowing opportunities across 25+ specialties, including surgery, radiology, neurology, cardiology, anesthesiology, and pediatrics
• Customized Curriculum: Flexible course selection tailored to each student’s academic background and career goals

More details are on our website seas.yale.edu/pmae.

Applications Open: September 15

Join an upcoming informational Zoom Session (registration link):

• Tuesday, Sept. 30, 6:00 pm EDT https://yale.zoom.us/j/97584615181?from=addon
• Friday, Oct. 24, 1:30 pm EDT https://yale.zoom.us/j/93666356156?from=addon
• Tuesday, Oct. 28, 6:00 pm EDT https://yale.zoom.us/j/98100560693?from=addon
• Wednesday, Nov. 19, 7:00 pm EST https://yale.zoom.us/j/94992022856?from=addon
• Wednesday, Dec. 3, 7:00 pm EST https://yale.zoom.us/j/96348713738?from=addon

For questions, please contact:
Dr. Daniel Wiznia (daniel.wiznia@yale.edu) and Dr. Steven Tommasini (steven.tommasini@yale.edu).
More information and application details can be found on our website.

Midterm Exam

In 2022, the New Yorker ran the above cartoon. At first, I thought it referred to our exams.

The midterm will be Thursday October 9 at 7pm in DL 220. It will be a 2 hour hand written exam. No computers. No notes. No books. No kidding. Students registered with Student Accessbility Services will take the exam in room ML 211, across the street.

Also, the paper Music and Computation, discussed below, is also in scope, up to but not including Music. There will be true/false questions about binary encodings of numbers, text, images, and sound. No questions about music.

Here is the document without the music section: Binary Encoding. Try this prompt with your favorite AI bot: Using the document found at https://zoo.cs.yale.edu/classes/cs200/lectures/BinaryEncoding.pdf please generate 20 sample true or false exam questions. Note: today the bots complain that they cannot load web files. Let me know if you find a way around this. In the mean time, I sent you 100 sample T/F questions on Friday.

Getting to know Python

hw2 review. - biggest file. Note from Ed Discussions:

You may use os.stat() to get the size of a file or directory. It
returns a tuple, the 7th element of which is size, that is,
element[6]:

bs5@giraffe:~/cs200/www/lectures/newdir$ pwd
 /home/accts/sbs5/cs200/www/lectures/newdir
 sbs5@giraffe:~/cs200/www/lectures/newdir$ ls -l
 total 0
 -rwxr--r-x 1 sbs5 faculty 6 Sep 22 15:38 goodbye
 -rw-rw-r-- 1 sbs5 cs200ta 6 Nov 1 2023 hello
 -rw-r--r-- 1 sbs5 cs200ta 12 Sep 25 08:35 high
 sbs5@giraffe:~/cs200/www/lectures/newdir$ stat high
 File: high
 Size: 12 Blocks: 0 IO Block: 65536 regular file
 Device: 0,57 Inode: 3763202446 Links: 1
 Access: (0644/-rw-r--r--) Uid: (10379474/ sbs5) Gid: (63533/ cs200ta)
 Access: 2025-09-25 08:35:15.879848000 -0400
 Modify: 2025-09-25 08:35:30.394796000 -0400
 Change: 2025-09-25 08:35:30.394796000 -0400
 Birth: -
bs5@giraffe:~/cs200/www/lectures/newdir$ p                                     
Python 3.12.3 (main, Aug 14 2025, 17:47:21) [GCC 13.3.0] on linux               
Type "help", "copyright", "credits" or "license" for more information.          
>>> import os                                                                   
>>> os.listdir()                                                                
['hello', 'goodbye', 'high']                                                    
>>> os.stat('high')                                                             
os.stat_result(st_mode=33188, st_ino=3763202446, st_dev=57,
st_nlink=1, st_uid=\ 10379474, st_gid=63533, st_size=12,
st_atime=1758803715, st_mtime=1758803730, s\ t_ctime=1758803730)
>>> os.stat('high')[6]                                                          
12                      
  

def biggest_file(dir):
  tempfile = '/tmp/biggest'
  cmd = 'ls -l ' + dir + " > " + tempfile
  # print( "Command to run:", cmd )
  status = os.system(cmd)
  # print ("status: " + str(status))
  if status:
      # print ( "Error in executing command: " + cmd)
      return '*** error reading ' + dir
  size = 0
  name = ''
  for line in open(tempfile, 'r'):
      fields = line.split()
      # print (fields)
      if len(fields) == 9:
          s = fields[4]
          n = fields[-1]
          if int(s) > size:
              size = int(s)
              name = n
  os.remove(tempfile)
  return ( name ) 

Everything is bits!

Object Oriented Programming

F String Formatting

Getting to know UNIX