Pfthb

I want the letters the user types (granted that they're in the 'letters') to replace the blanks in their correct sequential position (I don't want 'agbdf__'), and stop when all the letters are typed in. As the code is now, it requires letters to be typed multiple times, and it stops if the letter 'g' is typed seven times. This is a part of a hangman code I'm trying to implement. If anyone could post the right way to program this (not just a tip, because I most likely won't be able to figure out how to implement it), it would be much appreciated.

letters='abcdefg' 
blanks='_'*len(letters) 
print('type letters from a to g')
print(blanks)
for i in range(len(letters)):
 if letters[i] in input(): 
 blanks = blanks[:i] + letters[i] + blanks[i+1:]
 print(blanks)

Change your loop to:

for i in range(len(letters)):
 letter = raw_input()
 index = letters.index(letter)
 blanks = blanks[:index] + letter + blanks[index + 1:]
 print blanks

You are not replacing the correct blank/underscore, you are just sequentially replacing them. Instead you need to find the correct blank to replace, and then replace that. Also don't expect this code to be running infinitely until the blanks is completely filled. If you want that, you can figure that out I guess (as your question is specific to replacing correct letters). Also you might want this program should handle inputs other than 'abcdef' too :).

letters = 'abcdefg' 

print('type letters from a to g')

all_letters = list(letters)
blanks = ['_'] * len(letters) 

while True:
 guessed_letter = input("guess > ")

 while guessed_letter in all_letters:
 index = all_letters.index(guessed_letter)
 all_letters[index] = None
 blanks[index] = guessed_letter

 output = ''.join(blanks)
 print(output)

 if letters == output:
 print("gg")
 break

Or if you prefere a more stringy version

letters = 'abcdefg' 

print('type letters from a to g')

all_letters = list(letters)
blanks = '_' * len(letters) 

while True:
 guessed_letter = input("guess > ")

 while guessed_letter in all_letters:
 index = all_letters.index(guessed_letter)
 all_letters[index] = None 
 blanks = blanks[:index] + guessed_letter + blanks[index+1:]

 print(blanks)

 if letters == blanks:
 print("gg")
 break

You could use a list comprehension for this. Here's an example:

letters = 'abcdefg'
typed = raw_input('Type the characters a through g: ')
print ''.join(s if s in typed else '_' for s in letters)

Sample Output:

Type the characters a through g: abdef
ab_def_

Here's a more complete/advanced hangman example: https://gist.github.com/dbowring/6419866