如何将一定长度后的字符串中的所有内容移动到列表中 python

Question

I am trying to build a function that will take everything in a string after 140 characters and move it into a new variable for a second 'tweet'.

tweetlength = 140
tweet = input("What do you want to tweet: ")
tweet_copy = []
tweet_2 = []

for i in tweet:
    if len(tweet) <= tweetlength:
        print(tweet)
        break
    if len(tweet) >= tweetlength:
        tweet_copy = tweet
        for x in tweet_copy [140, 280]:
            tweet_2.append(x)
            print(tweet_copy + tweet_2)

However I am currently getting an error saying "string indices must be integers". I need to be able to refer to everything within the list with an index value of 140-280 but it seems I can't do that while it's a string?

Answer 1

Since you are using python, you don't have to loop through a string. Your code can be as simple as (assuming your input is at most 280, as you do in your original example):

tweetlength = 140
tweet = input("What do you want to tweet: ")
tweet, tweet_2 = (tweet[:tweetlength], tweet[tweetlength:])
print(tweet)
if tweet_2:  # An empty string evaluates as False
    print('Second part')
    print(tweet_2)

Answer 2

Just make a substring starting at position 140.

In snippet below "sub_s" will have the value "fg"

s = "abcdefg"
sub_s = s[5:]

Answer 3

I would use a generator like this:

MAXTWEET = 140

def tweets(user_input):
  while user_input:
    yield user_input[:MAXTWEET]
    user_input = user_input[MAXTWEET:]

for tweet in tweets('A very long string'):
  print(tweet)

In this way the input string can be of any length and the generator will return strings of, at most, MAXTWEET length