Instructions
Objective
Write a program to implement vinyl-record-system in python language.
Requirements and Specifications
To complete python assignment, my class is using an excel file with a list of the inventory of music media, band names, songs,release dates, and conditions that they are in.
Source Code
"""
Chapter 12: working with files
Name: Maxwell Sabel
File: ch12_vinyl_record_v5.py
Course: CIS 156, CGCC
"""
import datetime # this module helps us get the current year
import csv # here we are bringing in a library that helps read files
YEAR_OF_FIRST_VINYL_LP = 1948
# Part 1: as in previous weeks, you'll need to edit these next lines to find and place your files
# Use a file manager to see the full path of this file, then edit the text string inside the
# single quotes to match your system.
# Leave the leading lowercase r in place (this tells Python not to react to the symbols in the text)
#
# I happen to be using a directory called CIS156 under Documents.
# What you see below is on a Windows system... on a Mac this might look like
# r'/Users/david/Documents/CIS156/ch12_spring_2021_input_inventory.csv'
# Please keep the actual filenames (ch12_spring_2021_input_inventory.csv and ch12_report.txt) unchanged.
INPUT_FILE = r'C:\Users\sabel\OneDrive\Desktop\ch12_spring_2021_input_inventory.csv'
OUTPUT_FILE =r'C:\Users\sabel\OneDrive\Desktop\ch12_report.txt'
# BONUS 5 POINTS
# Modify above... incorporate os module as described in this week's chapter and make these file names a bit easier
# to find no matter what operating system you're on.
# Note: don't get hung up here... get all the other Parts working, then come back if you have time and interest
# in adding the os module.
# Part 2 - complete the following function
def read_inventory_from_a_file(in_filename):
"""Gets our inventory, returns a list of (you decide)
Parameters:
arg1 in_filename (string): a valid filename
returns: a list (You decide what the list is... could be a list of Vinyl_Record objects(Ch9), could be a list of lists (Ch8) - your choice
csv File format: text only .csv file with the following format:
Title,Artist,Year Released,Condition (no spaces between). The first row is a header.
Title and Artist are plain text
Year released is plain text
Condition is a few word description in plain text. Examples: scratched, near-perfect, warped
Return: a list of (you decide)
"""
### your code goes next ###
### end of your code ###
#### end of load_inventory_from_a_file ####
def today_timestamp():
"""Get today's date and time, return as a string"""
currentDT = datetime.datetime.now()
return currentDT.strftime("%a, %b %d, %Y, %I:%M:%S %p")
def splashscreen():
print("Chapter 12 - working with files, v5.")
# print("Now we add exception handling and error bounds on the year of album release")
print()
def goodby():
print('\n*** End of Ch12 working with files ***')
def main():
splashscreen()
# Ok, let's load in our inventory from the file
print("Reading in our inventory")
our_inventory = read_inventory_from_a_file(INPUT_FILE)
# print_an_inventory(our_inventory)
print("Writing our report to disk")
# Part 3 - Insert code to open the output file
# We'd like a text file written to disk that tells us some useful "at a glance" information about our inventory,
# like obvious mistakes in our data, the number of albums we have in various decades, and the total size of our inventory.
# Add code below to open the OUTPUT_FILE (specified at the top of this file) for writing.
# Put some title at the top of your report describing what the report, the current date, and include your name.
# If you want a starting spot, something like x.write("*** Vintage Vinyl on Wheels ***\n"),
# followed by x.write(today_timestamp() + "\n") is a beginning, where "x" is the output file handle you've used.
# See the example ch12_report.txt supplied in the homework. You must contain all the information shown,
# but you do not have to follow the precise formatting. In other words, include the requested information,
# but make this look the way you think is pleasing and easy to read.
# Hint: you will find that a lot of "\n" newlines are needed... the .write() method does not automatically append a
# newline like print() does, so you have to supply those yourself.
# your code goes next
# end of your code
# Part 4 - Continue to write more information into the report file. For Part 4, report on any
# incorrect values in our inventory, focused on invalid values for year_released.
# For the purposes of this week's homework, let's assume that year_released is
# actually correctly stored as an integer, and if the value is 0, then clearly we have a mistake,
# so, for each album in your inventory that has a year_released of 0, put out a line in your output file and
# put their title, artist, and year_released along with a few words to show it needs to be fixed.
# your code goes next
# end of your code
# Part 5 - Now we need some stats...
# As our last part, write some information into your file that tells us about our inventory.
# The information needed:
# Golden Oldies: any album released between 1948 to 1959, inclusive. I only want to know the quantity.
# The Rock Era: any album released between 1960 to 1999, inclusive. I only want to know the quantity.
# The 2000s: any album released from 2000 onward, inclusive. I only want to know the quantity.
#
# Finally, we'd like to know the total number of albums in our current inventory
# your code goes next
# end of your code
print("Closing the report file")
out_file.close() # close the file. Modify this line to match your file handle... I happened to use "out_file"
goodby()
# end of main
# call main
if __name__ == '__main__':
main()
# Copyright 2021 David Baker