Question

question
The parameter name is "load_words: (file)" and the output expected is "dict of {str: list of strs}".

The description of the problem given is:

"The open file contains one lowercase word per line. Return a dictionary in which each key is a single lowercase letter and each value is a list of the words from the file that start with that letter. Only letters that one or more words from the file start with appear as keys in the dictionary. "

Answer 1

the code that I wrote is

def load_words(file1):
dict1 = {}
for line in file1:
line = line.strip()
if line[0] in dict1:
if line not in dict1[line[0]]:
dict1[line[0]].append(line)
else:
dict1[line[0]] = [line]
return dict1

Answer 2

and the teachers automated thing replied with


test_3_load_words
=================
Total tests: 4, passed: 1, failed: 3, had errors: 0

SUCCESS: h u1 quellan csc108 exercises e3 repos e3 c2bhatti e3: test_3_load_words.TestCases METHOD: test_1a_return_type
Passed

FAILURE: h u1 quellan csc108 exercises e3 repos e3 c2bhatti e3: test_3_load_words.TestCases METHOD: test_1b_single_line
Traceback (most recent call last):
File "/h/u1/quellan/csc108/exercises/e3/tests/test_3_load_words.py", line 27, in test_1b_single_line
self.assertEqual(result, expected_result, msg)
AssertionError: e3.load_words(test_file) should return {'a': ['apple']}, but returned {}. test_file contains: apple


FAILURE: h u1 quellan csc108 exercises e3 repos e3 c2bhatti e3: test_3_load_words.TestCases METHOD: test_1c_multi_line_different_letters
Traceback (most recent call last):
File "/h/u1/quellan/csc108/exercises/e3/tests/test_3_load_words.py", line 38, in test_1c_multi_line_different_letters
self.assertEqual(result, expected_result, msg)
AssertionError: e3.load_words(test_file) should return {'a': ['apple'], 'p': ['pear'], 'b': ['banana']}, but returned {}. test_file contains: apple
banana
pear


FAILURE: h u1 quellan csc108 exercises e3 repos e3 c2bhatti e3: test_3_load_words.TestCases METHOD: test_1d_multi_line_duplicate_letters
Traceback (most recent call last):
File "/h/u1/quellan/csc108/exercises/e3/tests/test_3_load_words.py", line 52, in test_1d_multi_line_duplicate_letters
self.assertEqual(result, expected_result, msg)
AssertionError: e3.load_words(test_file) should return {'a': ['apple'], 'p': ['peach', 'pear', 'pineapple'], 'b': ['banana', 'blueberry'], 'o': ['orange']}, but returned {}. test_file contains: apple
banana
pear
orange
pineapple
peach
blueberry

Answer 3

i thought i was write but i dont know (N)

Answer 4

Is the input an actual file? Because you're going to have to actually open the file and load the information contained within into a variable. Have you been taught about the open() function to open files?

Answer 5

i think we have been but i dont know how to use it and yeah the input is a file he gives some example the banana blueberry stuff in his markings but i dont know so confused about this

Answer 6

was i wrong

Answer 7

Your code doesn't look bad. The first (or second) line of your code should be something like:

f = open(file1,'r')

What this does is it creates a variable that contains the contents of the file. The 'r' tells the program that we're going to read the file...if we wanted to write to a file, we'd use 'w' instead.

Then, instead of using file1 later in the function, you should use f instead (or whatever you choose to call the variable.

At the end of the function, it is good practice to call f.close() to close the file. It's not strictly necessary, but it's a good habit.

Answer 8

is r a builtin function?

Answer 9

so basically i will have

def load_words(file1):
f = open(file1, 'r')
dict1 = {}
for line in f:
line = line.strip()
if line[0] in dict1:
if line not in dict1[line[0]]:
dict1[line[0]].append(line)
else:
dict1[line[0]] = [line]
f.close()
return dict1

?

Answer 10

Yes, but there is one more problem with your code...you're not doing anything if line[0] is not in dict1.

Easy fix...take your else clause and align it with the first if, not the second.

Answer 11

hmm im not sure what you mean by that

Answer 12

like thiss?

def load_words(file1):
dict1 = {}
for line in file1:
line = line.strip()
if line[0] in dict1:
if line not in dict1[line[0]]:
dict1[line[0]].append(line)
else:
dict1[line[0]] = [line]
return dict1

Answer 13

Yes.

Answer 14

But don't forget the file stuff.

Answer 15

but you said i should include the close function where would I include it or is it not neccerary

Answer 16

o snap i dont have it there

Answer 17

At the end, like you did last time.

Answer 18

def load_words(file1):
f = open(file1, 'r')
dict1 = {}
for line in f:
line = line.strip()
if line[0] in dict1:
if line not in dict1[line[0]]:
dict1[line[0]].append(line)
else:
dict1[line[0]] = [line]
f.close()
return dict1

theree

Answer 19

Try it.

Answer 20

For the record, the description is a bit unclear. If the file looked like this:

apple
apple
apple
apple
apple

...does the program want you to return {'a':['apple']} or {'a':['apple','apple','apple','apple','apple]}? You currently have your program doing the former, which is probably what I would do, but I don't know if your teacher wants the former or the latter...maybe this is part of a bigger program and that's made clear.

Answer 21

ooo hmm i think he wants the former thats how it looked like in his automated marking

Answer 22

Okay, then you're good.

Answer 23

hey one more question you know the last code i wrode is my FIRST line when i define it is it going to be load_words(file1) or load_words(f)

Answer 24

load_words(file1)

Then the first line of code takes file1 (which is just the name of the file), opens it, and creates a file object called f.

Answer 25

alright perfect thanks a lot man appreciate itt

Answer 26

btw want to do my assignment :P

Answer 27

Well, I *am* taking this summer to get as good at Python as I can possibly be (I'm teaching a high school class on Python for the first time in January). But...no.

Answer 28

LOL worth a try :P

Answer 29

where do you currently teachh

Answer 30

Lincoln, Nebraska (US)

Answer 31

ooo cool cool goodluck you will make an amazing teacher (Y)

Answer 32

Well, I already am a teacher, but I finally convinced them to give me a programming class. :)