CODEWITHSUNDEEP
python
Stavan Shah
Stavan Shah

Reputation: 33

How to dynamically print list values?

This Code Works Fine.....But it's like static. I don't know what to do to make it work in dynamic way? I want:- When user inputs 3 number of cities it should give

a="You would like to visit "+li[0]+" as city 1 and " +li[1]+ " as city 2 and "+li[2]+" as city 3 on your trip"

Similaraly when input is 5 cities it should go to 5 times

li = []
global a

number_of_cities = int(raw_input("Enter Number of Cities -->"))
for city in range(number_of_cities):
   li.append(raw_input("Enter City Name -->"))
print li
a="You would like to visit "+li[0]+" as city 1 and " +li[1]+ " as city 2 and "+li[2]+" as city 3 on your trip"      
print a
a = a.split(" ")
print "\nSplitted First Sentence looks like"
print a
print "\nJoined First Sentence and added 1"
index = 0
for word in a:
   if word.isdigit():
      a[index] = str(int(word)+1)
   index += 1
print " ".join(a)

Upvotes: 0

Views: 872

Answers (3)

Blackbeard
Blackbeard

Reputation: 117

create another for loop and save your cities to an array. afterwords, concat the array using "join" and put put everything inside the string:

cities = []
for i in range(0,len(li), 1):
    cities.append("%s as city %i" % (li[i], i))

cities_str = " and ".join(cities)
a = "You would like to visit %s on your trip" % (cities_str) # edited out the + sign

Upvotes: 0

Ilja Everilä
Ilja Everilä

Reputation: 52949

You can build the string with a combination of string formatting, str.join and enumerate:

a = "You would like to visit {} on your trip".format(
    " and ".join("{} as city {}".format(city, i)
                 for i, city in enumerate(li, 1)))

str.join() is given a generator expression as the iterable argument. The curly braces ({}) in the strings are replacement fields (placeholders), which will be replaced by positional arguments when formatting. For example

'{} {}'.format('a', 'b')

will produce the string "a b", as will

# explicit positional argument specifiers
'{0} {1}'.format('a', 'b')

Upvotes: 0

Alex
Alex

Reputation: 1151

You should do something like this

a = 'You would like to visit ' + ' and '.join('{0} as city {1}'.format(city, index) for index, city in enumerate(li, 1)) + ' on your trip'

Upvotes: 2

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