1. avgData.py
2. file_write.py
3. writeSumReport2.py
4. writeSumReport.py

# Computes the average high temperature from a file that contains the daily
# high temperatures for last year at one location.
# CSCI 111

DATAFILE="data/alaska.dat"

# open the file
dataFile = open(DATAFILE, "r")

# initialize the sum accumulator
sumOfTemperatures = 0

# initialize the number of lines in the file accumulator
numOfTemperatures = 0

# read each line of the file
for line in dataFile:
    # convert the line to a float to represent the temperature
    temperature = float(line)
    
    # add the temperature to the sum
    sumOfTemperatures += temperature
    
    # update the number of temperatures
    numOfTemperatures += 1
    
# close the file
dataFile.close()
    
# divide the sum by the number of temperatures in the file.
avgTemperature = sumOfTemperatures/numOfTemperatures

# display the results (twice) to show two different ways to use format.
print("The average temperature is {:.2f}".format(avgTemperature))

print("The average temperature is", "{:.2f}".format(avgTemperature))

# Writes content from a user to a file
# by Sara Sprenkle

PROMPT = "Enter the next line in the file: "

outfilename = input("What is the name of your output file? ")
numLines = eval(input("How many lines do you want to write? "))

# create a new file object, in "write" mode
dataFile = open(outfilename, "w")

for x in range(numLines):
    userinput = input(PROMPT)
    # write the user's input to the file
    dataFile.write(userinput)
    # write a newline after each input from the user
    dataFile.write("\n")

# close the file with the method "close"
dataFile.close()

# Given: a file containing students names and their years (first years,
# sophomore, junior, or senior) for this class
# Problem: create a report (in a file) that says the year 
# and how many students from that year are in this class, on the same line.
# TODO: Write comments for the functions, improve user interface
# CSCI111


FILENAME="data/years.dat"

def main():

    outFile = open("data/report.dat", "w")

    lineList = getFileLines(FILENAME)

    for year in ["First-Year","Sophomore", "Junior", "Senior"]:
        numOccurences = countNumOccurrences(year, lineList)
        writeData(outFile, year, numOccurences)

    outFile.close()


def getFileLines(filename):
    """
    """
    myFile = open(filename, "r")
    lines = myFile.readlines()
    myFile.close()
    return lines

    
def countNumOccurrences(thing, strList):
    """
    """
    count = 0
    for string in strList:
        if thing in string:
            count += 1

    return count

def writeData(outFile, label, count):
    """
    """
    outFile.write( label + " " + str(count) + "\n")
    # alternatively
    #outFile.write("{:s} {:d}\n".format(label, count))

main()

# Given: a file containing students names and their years (first years,
# sophomore, junior, or senior) for this class
# Problem: create a report (in a file) that says the year 
# and how many students from that year are in this class, on the same line.
# Shows different examples of how to write parameters.
# CSCI111

FILENAME="data/years.dat"

def main():

    outFile = open("data/report.dat", "w")

    for year in ["First-Year","Sophomore", "Junior", "Senior"]:
        numOccurences = countNumOccurrences(year, FILENAME)
        writeData(outFile, year, numOccurences)

    outFile.close()

def countNumOccurrences(thing, filename):
    """
    Takes as parameters two strings, thing and filename
    Returns the number of lines where thing appears in the file
    described by filename.
    """
    count = 0
    inFile = open(filename, "r")
    for line in inFile:
        if thing in line:
            count += 1

    inFile.close()
    return count

def writeData(outFile, label, count):
    """
    pre: outFile is a file object, label is a string, count is a number
    Write a line of information to the file outFile, in the format:
    label count
    """
    outFile.write( label + " " + str(count) + "\n")
    # alternatively
    #outFile.write("{:s} {:d}\n".format(label, count))

main()