CODEWITHSUNDEEP
pythonpython-2.7list
Mr_Happy
Mr_Happy

Reputation: 39

Appending list with integers

I have been trying to create a tiny script that takes scrambled text from a template and finds a location. I have even managed to make it work by trial and error. Problem is.....I don't know how it works. Maybe someone can clarify it for me ? Here's the code:

word_list = """something
Location: City
other_something"""
word_list = word_list.split()
indexes = [(index + 1) for index in range(len(word_list)) if word_list[index] == "Location:"]
location = []
location2 = []
for index in indexes:
    location2 = location.append(word_list[index])
print location

After realising that name of the city always comes after the phrase "Location:" I wanted python to find and print the next word. It even works ! Now the part I don't get is why the location2 stays empty. To my understanding it should be equal to location. Or not ? Why the answer stays withing the Location ? Please note that I am a complete beginner so an answer that won't be very simple might be beyond my comprehension.

Upvotes: 1

Views: 70

Answers (2)

sam-pyt
sam-pyt

Reputation: 1047

you can take advantage of a list's .index() attribute,

word_list = """something
Location: City
other_something""".split()

print word_list[word_list.index('Location:')+1]

this will simply print 'City' in this situation. index() returns the index of the element specified by the first argument. By adding one to the index of 'Location', you can access the next element of the word_list, which will always be the location if the format of the word_string does not change.

Upvotes: 1

enbay1
enbay1

Reputation: 104

I hope this makes sense, this code is a bit wacky.

# This line of code assigns a value to the variable word_list
word_list = """something
Location: City
other_something"""
# This line makes a list from the words, with each item in the list being one word
word_list = word_list.split()
# This line loops the variable index over the range of the word_list, and if the index's value is "Location:" it stores
# index+1 into a list called indexes
indexes = [(index + 1) for index in range(len(word_list)) if word_list[index] == "Location:"]
# This makes an empty list called location
location = []
# This makes an empty list called location2
location2 = []
# This loops over the indexes in indexes
for index in indexes:
    # This line of code never stores anything to location2, because location.append appends to the list called 
    # 'location', and since location.append does not return a value to store, location2 remains empty
    location2 = location.append(word_list[index])
# This line prints the list called location.
print location

Upvotes: 1

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