U2 M4 A4.3

#Ayden Finch #11/3/21 #U2 M4 A4.3 #I learned how to read a file one line at a time.

# [ ]Run to download file poem1.txt !curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/poem1.txt -o poem1.txt

# [ ] review and run example # open address to file poem1 = open('poem1.txt', 'r')

# [ ] review and run example # readline 1, 2, 3 poem_line1 = poem1.readline() poem_line2 = poem1.readline() poem_line3 = poem1.readline()

# [ ] review and run example: print the first 3 .readline() values print(poem_line1 + poem_line2 + poem_line3)

# [ ] review and run example printing return value & re-run several times print(poem1.readline())

# [ ] review and run example to close file in memory- then run previous cell poem1.close()

# [ ] import https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/rainbow as rainbow.txt !curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/rainbow -o rainbow.txt

# [ ] open rainbow.txt as rainbow_text rainbow_text = open("rainbow.txt" , "r")

# [ ] read the first 3 lines into variables: color1, color2, color3 color1 = rainbow_text.readline() color2 = rainbow_text.readline() color3 = rainbow_text.readline()

# [ ] close rainbow.txt print(color1 + color2 + color3)

# [ ] print the first 3 colors rainbow_text.close()

# [ ] review and run example # open address to file poem1 = open('poem1.txt', 'r')

# [ ] review and run example - use a while loop to read each line of a file # remove last character ('\n') and print as upper case poem_line = poem1.readline() while poem_line: print(poem_line[:-1].upper()) poem_line = poem1.readline()

# [ ] review and run example poem1.close()

# [ ] open rainbow.txt as rainbow_text as read-only rainbow_text = open("rainbow.txt","r")

# [ ] read the color from lines of rainbow_text in a while loop # [ ] print each color capitalized as the loop runs rainbow_line = rainbow_text.readline() while rainbow_line: print(rainbow_line[:-1].capitalize()) rainbow_line = rainbow_text.readline()

# [ ] close rainbow_text rainbow_text.close()

# [ ] review and run example # open address to file poem1 = open('poem1.txt', 'r')

# [ ] review and run example - readline while loop without removing '\n' poem_line = poem1.readline() while poem_line: print(poem_line) poem_line = poem1.readline() poem1.close()

# [ ] review and run example - readline with .strip() to remove '\n' poem1 = open('poem1.txt', 'r') poem_line = poem1.readline().strip() while poem_line: print(poem_line) poem_line = poem1.readline().strip() poem1.close()

# [ ] open rainbow.txt as rainbow_text as read-only rainbow_text = open("rainbow.txt", 'r')

# [ ] read a color from each line of rainbow_text in a while loop # use .strip to remove the whitespace '\n' character # print each color upper case rainbow_line = rainbow_text.readline().strip() while rainbow_line: print(rainbow_line.upper()) rainbow_line = rainbow_text.readline().strip()

# [ ] review and run example: import rainbow_messy.txt !curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/rainbow_messy -o rainbow_messy.txt

# [ ] review and run example: open file read only rainbow_messy = open('rainbow_messy.txt', 'r')

# [ ] review and run example: .readline() without .strip() color = rainbow_messy.readline() while color: print(color) color = rainbow_messy.readline()

# [ ] review and run example: strip "*" and newline ('\n') rainbow_messy = open('rainbow_messy.txt', 'r') color = rainbow_messy.readline().strip('*\n') while color: print(color) color = rainbow_messy.readline().strip('*\n') rainbow_messy.close()

# [ ] import the file !curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/cities_messy -o cities_messy.txt

# [ ] run to read the file into memory cities_messy = open('cities_messy.txt', 'r')

# [ ] edit the code to remove leading or trailing colon, newline and space characters line = cities_messy.readline().strip(":\n ") while line: print(line) line = cities_messy.readline().strip(":\n ")

# [ ] import https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/poem2_messy as poem2_messy.txt !curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/poem2_messy -o poem2_messy.txt

# [ ] open poem2_messy.txt as poem2_messy in read mode poem2_messy = open("poem2_messy.txt","r")

# [ ] edit while loop to strip the leading and trailing parenthesis, and newlines # [ ] print the poem line = poem2_messy.readline().strip(")\n (") while line: print(line) line = poem2_messy.readline().strip(")\n (")