#Helina Hailu
#January 5,2021
#I learned to read a list with .readlines() and to close files with .close().
#I had no difficulty completing this activity
# [ ] Run to download file to notebook
!curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/poem1.txt -o poem1.txt
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 56 100 56 0 0 565 0 --:--:-- --:--:-- --:--:-- 565
# [ ] review and run example
# open address to file
poem1 = open('poem1.txt', 'r')
# readlines and print as a list
poem_lines = poem1.readlines()
poem_lines
# [ ] review and run example
for line in poem_lines:
print(line)
Loops I repeat
loops
loops
loops
I repeat
until I
break
# [ ] import cities
#Using !curl to import the web address and naming it cities.txt with -o
!curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/cities -o cities.txt
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 56 100 56 0 0 513 0 --:--:-- --:--:-- --:--:-- 513
# [ ] open cities.txt as cities_file and read the file as a list: cities_lines
#Opening cities.txt as cities file and read the file using .readlines() in the variable cities_lines
cities_file = open("cities.txt", "r")
cities_lines = cities_file.readlines()
# [ ] use list iteration to print each city in cities_lines list
#Using for in to print cities_lines without /n
for line in cities_lines:
print(line)
Beijing
Cairo
London
Nairobi
New York City
Sydney
Tokyo
# [ ] review and run examples
# [ ] re-open file and read file as a list of strings
poem1 = open('poem1.txt', 'r')
poem_lines = poem1.readlines()
print(poem_lines)
['Loops I repeat\n', 'loops\n', 'loops\n', 'loops\n', 'I repeat\n', 'until I\n', 'break\n']
# [ ] print each list item
for line in poem_lines:
print(line)
Loops I repeat
loops
loops
loops
I repeat
until I
break
# [ ] remove the last character of each list item, which is "\n"
count = 0
for line in poem_lines:
poem_lines[count] = line[:-1]
count += 1
print(poem_lines)
['Loops I repeat', 'loops', 'loops', 'loops', 'I repeat', 'until I', 'break']
# [ ] print each list item
for line in poem_lines:
print(line)
Loops I repeat
loops
loops
loops
I repeat
until I
break
# [ ] re-open file and read file as a list of strings
# [ ] open cities.txt as cities_file and read the file as a list: cities_lines
cities_file = open("cities.txt", "r")
cities_lines = cities_file.readlines()
# [ ] remove the last character, "\n", of each cities_lines list item
iterate = 0
for line in cities_lines:
cities_lines[iterate] = line[:-1]
iterate += 1
# [ ] print each list item in cities_lines
for line in cities_lines:
print(line)
Beijing
Cairo
London
Nairobi
New York City
Sydney
Tokyo
# [ ] review and run example: open and readlines of poem1.txt
poem1 = open('poem1.txt', 'r')
# [ ] review and run example: readlines breaks if file is no longer open
poem_lines = poem1.readlines()
print(poem_lines)
['Loops I repeat\n', 'loops\n', 'loops\n', 'loops\n', 'I repeat\n', 'until I\n', 'break\n']
# [ ] review and run example: Close poem1
poem1.close()
# [ ] open cities.txt as cities_file
cities_file = open('cities.txt','r' )
# [ ] read the lines as cities_lines
cities_lines = cities_file.readlines()
# [ ] print the cities that start with the letter "D" or greater
#Using for in and if else to print cities starting with the letter d or more
for line in cities_lines:
if line[0] >= "D":
print(line)
else:
pass
# [ ] test that file is closed
#There should be a value error since the file is closed
cities_lines =cities_file.readlines()
print(cities_lines)
Execution error
ValueError: I/O operation on closed file.
# [ ] close cities_file
cities_file.close()
# [ ] import https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/poem2.txt as poem2.txt
#Using !curl to import a web address and using -o to rename it poem2.txt
!curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/poem2.txt -o poem2.txt
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 57 100 57 0 0 600 0 --:--:-- --:--:-- --:--:-- 600
# [ ] open poem2.txt as poem2_text in read mode
poem2_text = open("poem2.txt", "r")
# [ ] create a list of strings, called poem2_lines, from each line of poem2_text
poem2_lines = poem2_text.readlines()
# [ ] remove the newline character for each list item in poem2_lines
count = 0
for line in poem2_lines:
poem2_lines[count] = line[:-1]
count += 1
poem2_lines
# [ ] print the poem2 lines in reverse order
for line in poem2_lines:
poem2_lines.reverse()
print(line)
while True
False
True
loop
True
loop
not True
I loop
end