Python Reading

• Read the chapter entitled Files from section "Working with Data Files" through section "Iterating over Lines in a File".

Key Ideas

• Opening a File
  • To read from it: open(filename, "r")
  • To write to it: open(filename, "w")
  • To close it: filevariable.close()
• Absolute File Paths vs. Relative File Paths
• The file census2023.txt captures US census data.
• The file census.py reads in and prints out the census.txt file.

Active Learning

• Modify the census.py so that it calculates and prints the total 2023 U.S. population. (If your program is correct, the number will match the Census Bureau total.)
• Work Exercise 2