So there’s two parts to for-loops that can trip people up, but try dropping some real snippet of code that you don’t get. It’s easier to explain a real thing. Also, try this:
import random
from urllib.request import urlopen
import sys
WORD_URL = "http://learncodethehardway.org/words.txt"
WORDS = []
PHRASES = {
"class %%%(%%%):":
"Make a class named %%% that is-a %%%.",
"class %%%(object):\n\tdef __init__(self, ***)" :
"class %%% has-a __init__ that takes self and *** parameters.",
"class %%%(object):\n\tdef ***(self, @@@)":
"class %%% has-a function named *** that takes self and @@@ parameters.",
"*** = %%%()":
"Set *** to an instance of class %%%.",
"***.***(@@@)":
"From *** get the *** function, and call it with parameters self, @@@.",
"***.*** = '***'":
"From *** get the *** attribute and set it to '***'."
}
# do they want to drill phrases first
if len(sys.argv) == 2 and sys.argv[1] == "english":
PHRASE_FIRST = True
else:
PHRASE_FIRST = False
# load up the words from the website
for word in urlopen(WORD_URL).readlines():
WORDS.append(str(word.strip(), encoding="utf-8"))
def convert(snippet, phrase):
class_names = [w.capitalize() for w in
random.sample(WORDS, snippet.count("%%%"))]
other_names = random.sample(WORDS, snippet.count("***"))
results = []
param_names = []
for i in range(0, snippet.count("@@@")):
param_count = random.randint(1,3)
param_names.append(', '.join(random.sample(WORDS, param_count)))
'''
for sentence in snippet, phrase:
'''
result = sentence[:]
# fake class names
for word in class_names:
result = result.replace("%%%", word, 1)
# fake other names
for word in other_names:
result = result.replace("***", word, 1)
# fake parameter lists
for word in param_names:
result = result.replace("@@@", word, 1)
results.append(result)
return results
# keep going until they hit CTRL-D
try:
while True:
snippets = list(PHRASES.keys())
random.shuffle(snippets)
for snippet in snippets:
phrase = PHRASES[snippet]
question, answer = convert(snippet, phrase)
if PHRASE_FIRST:
question, answer = answer, question
print(question)
input("> ")
print(f"ANSWER: {answer}\n\n")
except EOFError:
print("\nBye")
Hi Zedd, I correlated the code and it’s all working fine. But I still not sure that I understood fully how to interpret the pat I highlighted in ‘red’’ in the above snippet for sentence in snippet, phrase:
for sentence in snippet, phrase:
print(snippet)
print(phrase)
result=sentence[:]
here snippet and phrase are same values as fallowing:
class %%%(object):
def __init__(self, ***)
class %%% has-a __init__ that takes self and *** parameters.
class %%%(object):
def __init__(self, ***)
class %%% has-a __init__ that takes self and *** parameters.
class Bucket has-a __init__ that takes self and chin parameters.
code doesn’t work if I remove one parameter from for: though they both are same.
Yes, that’s right. In Python you can create tuples without enclosing parentheses, and that’s just what happens here: snippet, phrase is the same as (snippet, phrase). So you create a tuple on the fly with this confusing notation and then you iterate over it.